Kyushu University Academic Staff Educational and Research Activities Database
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WENXUE WANG Last modified date:2018.05.22



Graduate School
Undergraduate School


E-Mail
Homepage
http://www.riam.kyushu-u.ac.jp/dansei/member/bungaku/wangh-j1.html
Phone
092-583-7757
Fax
092--583-7760
Academic Degree
Engineering Doctor
Country of degree conferring institution (Overseas)
No
Field of Specialization
Composite materials, Fracture mechanics, Computational mechanics
Total Priod of education and research career in the foreign country
00years00months
Research
Research Interests
  • Research on the wind turbine system with energy-saving passively self-adapative flanged diffuser
    keyword : Wind turbine, energy-saving, self-adapative flanged diffuser
    2013.01.
  • Research on the energy-saving automobile
    keyword : CFRP, energy-saving, automobile
    2010.04.
  • Development of high strength UACS compositts and its application to reduction of thermal residual stress in CFRP/metal hyabrid laminates
    keyword : Short fiber reinforced plastic, UACS、CFRP/metal、複合材料
    2010.04.
  • Structures and materials of wind power system
    keyword : wind power system, turbine blade of wind power, tower of wind power, strength of wind power structures, composite materials
    2009.12.
  • health mornitoring of structures using mechanoluminescence materials
    keyword : Mechanoluminescence, health mornitoring, stress distribution
    2005.04.
  • Nano-composites
    keyword : CNT, CNT/polymer composites
    2007.05.
  • The pressure hull of deep ocean submersibles.
    keyword : Pressure hull, deep ocean submersibles, CFRP, metal/CFRP hybrid materials
    2005.04.
  • Computational meshless methods
    keyword : meshless method, computational methods, isotropic, finite point method
    2002.04.
  • CFRP/metal hybrid laminates
    keyword : CFRp, CFRP/metal, hybrid laminates, galvanic corrosion, nano-composite coating
    2002.04.
  • C/C composite and metal infiltrated Cu-C/C and Si-C/C composites
    keyword : C/C composite, metal infiltrated C/C composites,
    2000.04.
  • Interfacial fracure of composite laminates
    keyword : Composites, interfacial fracture, fracture toughness, effects of temperature, test methods
    2000.04.
Current and Past Project
  • In this project, researches related with the CNT/epoxy composite materials are carried out. The research goal is the development of unidirectional CNT/epoxy composite materials with high strength, high stiffness, high electrical conductivity, and thermal conductivity.
  • In this project, researches related with the renewable energy system engineering are carried out. Its immediate targets are material and structural issues for a wind turbine with a brimmed shroud developed by RIAM, highly functionalized wind turbine structures including adaptive blades, characterization of large-sized CFRP wind turbine, and material and structural designs aiming at the offshore deployment of wind turbines.
  • In this project, a new Unidirectionally Arrayed Chopped Stands (UACS) with artificial cut with different angle is proposed. The effects of aspect and angle of the UACS on the strength, stifness and deformation of UACS laminates are investigate by numerical simulation and experiment to find optimum cuting angle and aspect of choppen stands. Furthermore, the application of the above mentioned UACS to the galvanic corrosion-resistant CFRP/Al hybrid laminates is studied by experimental and numerical simulation to develop a new CFRP/Al laminates with high corrosion-resistance and low thermal residual stress.
  • This project is a joint project of Tohoku University group and Kyushu University group. The project is concerned with the reseaches on the three interfaces, i.e. biomechanical-biological interface, biomaterial-biological interface and host-parasite interface. In our lab., the research is mainli focus on the biomaterial-biological interface and biomechanical-biological interface.
  • This project is a part of a big project (Prof. Xu) of CREST and it is a project on the research of health mornitoring using mechanoluminescence materials developend by Prof. Xu. This kind mechanoluminescence materials can emit visual light when it is subjected to external loading. The visual light is much stronger than other previously developed mechanoluminescence materials and it is visible by nake eye. The light distribution is similar to the equivalent stress distribution so that one can obtain the stress distribution from light distribution. This mechanoluminenscence material provide a new technology to us for the health mornitoring of structures in service in real time. In the project, we want clarify the relationship between visual light and variou parameters such as loading rate, load types, and other factors and find a simple way to evaluate the stress from the light intensity.
  • In this project, a new method to create a galvanic corrosion-resistant CFRP/Al-FRML based on nano-composite coating is developed. Nano-composite coating consists of a sulfuric acid anodizing and a silica nano-particle reinforced hybrid sol-gel coating and is conducted on the surface of Aluminum alloy 2024-T3 to prevent the galvanic corrosion between carbon and aluminum alloy. Electrochemistry, corrosion, and mechanical tests are studied.
  • In this project, research on the mechanical properties, frictional propereties and fatigue strength of the carbpn-carbon composite (C/C) and metal infiltrated C/C omposites: Cu-C/C and Si-C/C are conducted.
Academic Activities
Reports
1. This paper proposes a new smart sensor for the detection of damage in structures using mechanoluminescence (ML) material SrAl2O4:Eu (SAOE). SAOE is a kind of functional ceramics that can emit visual light when it is subjected to external mechanical action. The luminescence of SAOE is very high so that it enables us to view the visual light with naked eye. A smart film sensor is fabricated using SAOE powder and polymer. The effect of load frequency on the emitted visual light is investigated under cyclic loading conditions. Furthermore, detection of a crack and evaluation of the stress concentration and stress intensity factors are performed using SAOE film sensor. Experimental results demonstrate that the visual light emitted by SAOE film sensor has good correlation with the equivalent strain and stress. .
Papers
1. Hang Li, Wen-Xue Wang, Terutake Matsubara, Jia Xue, Dongmei Luo, Effects of specimen width on the tensile strength of aligned short-carbon-fiber reinforced epoxy composite laminates, Proceedings of 20th International Conference on Composite Materials (ICCM20), 1-9, 2015.07.
2. Junfeng Hu, Wen-Xue Wang, Upgrading a Shrouded Wind Turbine with a Self-Adaptive Flanged Diffuser, Energies, 2015, 8(6), 5319-5337; doi:10.3390/en8065319, 2015.06.
3. Jia Xue, Wen-Xue Wang, Junfeng Hu, Jia-Zhen Zhang, Su-Jun Wu, Influence of fiber length on the tensile behavior of fiber metal laminates with discontinuous reinforcement, Journal of Reinforced Plastics and Composites, vol. 34(20), (2015) pp. 1651-1661. , 2015.10.
4. Wen-Xue Wang, T. Matsubara, Y Takao, K. Yasuda, R. Hayashi, Effects of curing conditions on the short time co-cure of CFRP-steel hybrid laminates, Journal of Reinforced Plastics and Composites, 34 (10) (2015.5) pp. 819-829., 2015.05.
5. Jia Xue, Wen-Xue Wang, Jia-Zhen Zhang, Su-Jun Wu, Progressive failure analysis of the fiber metal laminates based on chopped carbon fiber strands, Journal of Reinforced Plastics and Composites, 34 (5) (2015.3) pp. 364-376., 2015.03, In this study, we propose a new fiber metal laminate based on unidirectionally arrayed chopped strand (UACS) reinforced aluminum sheets, referred to as UACS/Al laminate. UACS is made by introducing slits into unidirectional carbon fiber reinforced olastic (CFRP) prepreg. Due to the presence of discontinuous fibers, the microstructure of the UACS/Al laminate is much more complicated than conventional fiber metal laminate, which also results in a failure progression that is more complicated. Tensile failure of the UACS/Al laminate might occur as combination of intra-laminar damage at the slits, inter-laminar damage at the interfaces, in-ply damage of the CFRP and plastic deformation of the aluminum plies. Fabrication and tensile tests of UACS/Al laminate specimens were performed. A two-dimensional finite element model was developed with intra-laminar cohesive elements inserted into the slits of the UACS plies and with inter-laminar cohesive elements inserted into the interfaces between all laminas in the modelled UACS/Al laminates. A numerical study is conducted to investigate the influence of the shape of the cohesive laws on the FEA predictions. The combined experimental and numerical studies provide a detailed understanding of the failure progression of UACS/Al laminates under tensile load..
6. Jia Xue, Wen-Xue Wang, Jia-Zhen Zhang, Su-Jun Wu, Hang Li, Experimental and numerical study on the tensile behaviour of UACS/Al fibre metal laminate, Appl Compos Mater, DOI 10.1007/s10443-014-9419-y, 2014.12, A new fibre metal laminate fabricated with aluminium sheets and unidirectionally
arrayed chopped strand (UACS) plies is proposed. The UACS ply is made by cutting parallel
slits into a unidirectional carbon fibre prepreg. The UACS/Al laminate may be viewed as
aluminium laminate reinforced by highly aligned, discontinuous carbon fibres. The tensile
behaviour of UACS/Al laminate, including thermal residual stress and failure progression, is
investigated through experiments and numerical simulation. Finite element analysis was used
to simulate the onset and propagation of intra-laminar fractures occurring within slits of the
UACS plies and delamination along the interfaces. The finite element models feature intralaminar
cohesive elements inserted into the slits and inter-laminar cohesive elements inserted
at the interfaces. Good agreement are obtained between experimental results and finite element
analysis, and certain limitations of the finite element models are observed and discussed. The
combined experimental and numerical studies provide a detailed understanding of the tensile
behaviour of UACS/Al laminates..
7. Wen-Xue Wang, T. Matsubara, Y. Takao, K. Yasuda, R. Hayashi, Effects of adhesive conditions on the interlaminar shear strength of CFRP/stell hybrid laminate, Proceedings of The 11th China-Japan Joint Conference on Composite Materials, 1-6, 2014.10, In this paper, effects of adhesive conditions and cure pressure on the interlaminar shear strength of CFRP/steel hybrid laminate are investigated experimentally. The adhesive conditions include the surface treatment of metal layer, with or without an adhesive film, and types of adhesive films. Three cure pressures and three kinds of adhesive films are used in the fabrication of CFRP/steel hybrid laminates. Experimental results reveal significant effects of adhesive conditions and pressure on the interlaminar shear strength..
8. Hang Li, Wen-Xue Wang, Terutake Matsubara, Dongmei Luo, Jia Xue, Damage Progression Analysis of Newly Designed Unidirectionally Arrayed Chopped Strands Laminates, Proceedings of The 9th Asian-Australasian Conference on Composite Materials (ACCM-9), 1-6, 2014.10, In this study, the damage progression analysis of unidirectionally arrayed chopped strands (UACS) laminates with current continuous slit distribution and two types of newly designed discontinuous slit distributions under tension are simulated based on a multiscale analysis. The multiscale analysis includes a homogenization analysis and a damage progression analysis. The elastic constants of the UACS laminas used in the macroscopic region are obtained from the homogenization analysis. Cohesive interface element and maximum stress criterion are employed for the simulation of the progression of delamination and other failure modes in the laminates, respectively. The results of damage progression analysis reveal that the intersection areas of slits in 0° ply and adjacent plies appear initial delamination in all cases of UACS laminates. The ends of discontinuous slits inhibit the delamination development efficiently which result that comparing with continuous slit pattern, newly designed patterns UACS laminates perform large level of strength.
9. Wen-Xue Wang, Jun-Feng Hu, Terutake Matsubara, An approximate method for the fluid-structure coupling analysis of a flexible plate normal to the fluid flow, World Renewable Energy Congress 13 (WREC-XIII), 1-7, 2014.08, This paper aims to develop an approximate analysis method for the evaluation of the averaged pressure acting on a flexible plate normal to the wind flow. The average pressure is defined by the total normal force acting on the deformed plate divided by the area of the plate. The total normal force depends on the wind velocity and deformation of the plate. A theoretical formulation is proposed to describe the relationship between the normal drag coefficient of a curved rigid-plate and the configuration of the plate. Based on this relationship, an approximate method using only the iteration of structure mechanics analysis is constructed to evaluate the deformation of a flexible plate and the averaged wind pressure acting on the plate, instead of conventional complex iterations of fluid-structure coupling analysis. Computational simulations for 2-dimensional and 3-dimensional models of flexible plates are performed for various wind velocities. Numerical results of the averaged wind pressure obtained from the approximate method agree well with those obtained from the fluid dynamics analysis of rigid-plates with the same configurations which are determined from the iterative analysis of structure mechanics. .
10. Wen-Xue Wang, Terutake Matsubara, Satoru Odawara, Yuji Ohya, Takashi Karasudani, Effects of the flanged diffuser on the dynamic behavior of CFRP blade of a shrouded wind turbine, Great Renewable Energy 2014 International Conference, 1-4, 2014.08, Wind tunnel experiments are conducted to investigate the influence of the flanged diffuser on the dynamic behavior of the blade, fabricated by the skin of carbon fiber reinforced plastic and core, of a 3kW wind turbine shrouded with a flanged diffuser. Three wind velocities (6.9 m/s to 11.6 m/s) and three different yawing angles (0-degree to 30-degree) are tested to investigate the effects of the interactions of the flanged diffuser and the yawing angle on the blade. The rotation speed and the dynamic strain of the blade are measured under the conditions with and without the flanged diffuser. Two telemeter systems of transmitter and receiver are used in the measurement of the dynamic strains of the rotating blade. The mechanical tests of the blade and the skin of the blade are also performed to obtain basic data for the estimation of the strength of the blade. Experimental results reveal that the rotation speed and the dynamic strain of the blade of the wind turbine with flanged diffuser are much higher than those without flanged diffuser, as predicted by the previous aerodynamic research. On the other hand, the rotation speed and the dynamic strain of the blade decrease with the yawing angle increases. Furthermore, the influence of the flanged diffuser on the variation of the tensile strain within one rotation is relatively slight. The carbon fiber reinforced plastic is available for small wind turbine with relatively high rotation speed to reduce the centrifugal load applied to the blade..
11. 李 航, WENXUE WANG, 松原 監壮, Multiscale analysis of damage progression in newly designed UACS laminates, Composites: Part A , http://dx.doi.org/10.1016/j.compositesa.2013.11.003, 57, 108-117, 57 (2014) 108–117., 2014.02, In this paper, the damage progression in laminates fabricated by unidirectionally arrayed chopped strands (UACS) with newly designed slit distribution patterns under tension is simulated based on a multiscale analysis. The multiscale analysis includes a homogenization analysis and a hybrid modeling of partial microscopic region combined with a partial macroscopic region. The homogenization analysis is employed to calculate the elastic constants of the laminas used in the macroscopic modeling. The silt distribution patterns are exactly modeled in the microscopic region. Cohesive interface element and maximum stress criterion are employed for the simulation of the progression of delamination and other failures in the laminates, respectively. .
12. Wen-Xue Wang, Hang Li, Yoshihiro Takao, Terutake Matsubara, New unidirectionally arrayed chopped strands composites by introducing discontinuous angled slits into prepreg, Proceedings of 15th European Conference on Composite Materials, Proceedings of 15th European Conference on Composite Materials, Venice, Italy, 24-28 June, Paper ID 1467 pp. 1-8 (2012)., 2012.06.
13. Z.X. Chen, W.X. Wang, Y. Takao, T. Matsubara and L.M. Ren, Changes in surface characteristics of anodized titanium arising from water immersion, 粉体および粉末冶金, 粉体および粉末冶金,,Vol.59, No.7 pp. 415-420 (2012.7), 2012.07, Titanium surface is usually modified using a spark anodizing technique for biomedical application, and the resultant anodic TiO2 layer on the surface plays a crucial role in promoting the favorable biologic response. However, despite the fundamental importance of anodic TiO2 layer, little is known about its long-term stability or changes in vivo. In this study, as a first step to elucidate the surface changes of anodized titanium in vivo, changes in surface characteristics of anodic TiO2 layer arising from water immersion at 37 oC were investigated. It was found that after water immersion for 1 week, numerous nanoparticles emerged on the surface of anodized titanium fabricated at a voltage of 200 V, and with the further increasing of immersion time, more nanopartiles formed and interconnected with each other, resulting in a nanostructured surface layer. Transmission electron microscopy investigation of anodic TiO2 layer before and after water immersion indicated that water immersion transformed the originally amorphous TiO2 layer into crystalline anatase gradually, and the lap-shear test of oxide layers demonstrated the decreased shear strength with water immersion. In addition, it was found that the increased anodization voltage led to the anodic TiO2 layer with better stability..
14. Noriyoshi Hirano, W.X. Wang, Y. Takao, The Effect of temperature on Bearing Strength of CFRP Bolted Joint with Washer Constraining , Reports of Research Institute for Appplied Mechanics, Kyushu University, 142, 21-27, Reports of Research Institute for Appplied Mechanics, Kyushu University No.142, 21-27 (2012), 2012.03, Bolted joint bearing tests are conducted at room temperatureand at high and low temperatures for CF/epoxy quasi-isotropic
laminates cured at 180C with two stacking sequences, namely, [0/45/45/90]3S and
[90/45/45/0]3S. Then, the evolution of microscopic damage as a function of load
is examined by using an optical microscope. This article presents an original set of
experimental data on the bearing strength of CF/epoxy pinned joints at high and low
temperatures, as well as room temperature, while the previous studies did not cover
the wide range of temperatures. Moreover, a technique for dynamically monitoring
the load is developed to obtain the damage at the maximum load. The critical
damage has not been distinguished from the secondary ones in the previous
literature. .
15. Z.X. Chen, W.X. Wang, Y. Takao, T. Matsubara, L.M. Ren, Surface characteristics and indentation deformation of porous anodic TiO2 layer before and after hot water treatment, Rare Metal Materials and Engineering, Rare Metal Materials and Engineering, 41(S1), pp. 38-42 (2012)., 2012.02.
16. W.X. Wang, C. Li, Y. Sakata, R. Momoda, and C.N. Xu, Visualization of stress concentration around inclined crack-like notch using mechanoluminescence film sensor, Proceedings of International Forum on Mechanoluminescence and Novel Structural Health Diagnosis 2011, 2011.11, This paper describes the experimental visualization of stress concentration around inclined cracks using mechanoluminescence (ML) film sensor. The distribution of equivalent stress calculated by finite element analysis is compared with the distribution of intensity of visual light emitted by ML sensor when the specimen is subjected to tensile load. Both of them are in good consistence. Experimental results prove that the ML film sensor is available and convenient for the evaluation of complicated stress concentration..
17. W.X. WANG, Y. IMAI , T. Matsubara, Y.TAKAO and C.N. XU, A New Damage Detecting Method Using Smart Mechanoluminescence Sensor, Proceedings of the 6th Asian-Pacific Conference on Aerospace technology and Science, Proceedings of the 6th Asian-Pacific Conference on Aerospace technology and Science, CDROM C2-8, pp.1-8, (2009.11)., 2009.11.
18. W.X. Wang, M. Nakata, Y. Takao, T. Matsubara, Experimental Investigation on Test Methods for Mode II Interlaminar Fracture Testing of Carbon Fiber Reinforced, Composites Part A, Composites Part A 40 (2009) pp. 1447-1455., 2009.04.
19. In this research, new hybrid material composed of CFRP (carbon fiber reinforced polymer) layer and metal layer of titanium alloy or aluminum alloy is developed for the pressure hull of deep ocean submersibles. A proper stacking sequence of CFRP layer is proposed. Two pressure hulls of an aluminum alloy pressure hull and a hybrid material pressure hull with aluminum alloy inner and CFRP are manufactured on a scale of 1/3 of a practical pressure hull. Hydrostatic pressure experiment of two pressure hulls is performed. Experimental results prove that hybrid material pressure hull has a much higher specific strength than aluminum alloy pressure hull..
20. W.X. Wang, T. Matsubara, Y. Takao,Y. Imai, and C.N. Xu, Visualization of Stress Distribution Using Smart Mechanoluminescence Sensor, Materials Science Forum, Materials Science Forum Vol. 614 (2009) pp 169-174., 2009.02.
21. Xue Jia, Wang Wenxue, Xu Yuanming, Analysis of thermal residual stress in CFRP/Al laminates , Design of Aircraft , Vol.28 No.5 (2008), pp.22-26., 2008.10.
22. W.X. WANG, T. Matsubara, Y.TAKAO, Y. IMAI and C.N. XU, Smart Strain Sensor Using SrAl2O4:Eu/Polymer Composite Film, Proceedings of The 8th China-Japan Joint Conference on Composite Materials, pp 357-360 (2008)., 2008.10.
23. Xue Jia, Wang Wenxue, Xu Yuanming1, Analysis of thermal residual stress in CFRP/Al laminates (CARALL)
, Proceedings of The 8th China-Japan Joint Conference on Composite Materials, pp 311-315 (2008)., 2008.10.
24. W.X. Wang, T. Matsubara, Y. Takao,Y. Imai, and C.N. Xu, Visualization of Stress Distribution Using Smart Mechanoluminescence Sensor, Proceedings of The 6th International Forum on Advanced Material Science and Technology, Proceedings of The 6th International Forum on Advanced Material Science and Technology, CDROM (A078)1-6 (2008)., 2008.06.
25. Yuko Harita, Wen-Xue Wang, Yoshihiro Takao, Terutake Matsubara, Shunsuke Baba, Makoto Higashijima, Iwao Kashima, , Development of galvanic corrosion resistant carbon fiber aluminum laminates based on nanocomposite coating, Proceedings of The US-Japan Conference on Composite Materials 2008, Proceedings of The US-Japan Conference on Composite Materials 2008, CDROM, (HTC-4)1~10 (2008)., 2008.06.
26. Wen-Xue Wang, Yoshihiro Takao, Terutake Matsubara, Tensile strength and fracture toughness of C/C and metal infiltrated composite Si-C/C and Cu-C/C, Composites: Part A, Composites: Part A, 39, 231-242 (2008), 2008.02.
27. Wen-Xue Wang, Yoshihiro Takao, Terutake Matsubara, Fracture characteristics of C/C and metal infiltrated Composites Si-C/C and Cu-C/C
, Proceedings of the 6th Korea-Japan Joint Symposium on Composite Materials, Proceedings of the 6th Korea-Japan Joint Symposium on Composite Materials, Pohang, Korea, pp. 117-118, (2007.11)., 2007.11.
28. Yuko Harita, Yoshihiro Takao, Wen-Xue Wang, and Terutake Matsubara, Effects of silica nano-particles on properties of carbon fiber aluminum laminates, Proceedings of the 6th Korea-Japan Joint Symposium on Composite Materials, Proceedings of the 6th Korea-Japan Joint Symposium on Composite Materials, Pohang, Korea, pp. 42-43, (2007.11)., 2007.11.
29. Wen-Xue Wang, Makoto Higashijima, Yoshihiro Takao, and Terutake Matsubara, Test methods for evaluating interlaminar shear strength of CFML, Proceedings of International Conference on Advanced Technology in Experimental Mechanics’07 (ATEM’07),, CDROM ID-90286, pp. 1-6, (2007)., 2007.09.
30. Wen-Xue Wang, Yoshihiro Takao, Terutake Matsubara, Galvanic corrosion-resistant carbon fiber metal laminates, Proceedings of ICCM-16, CDROM ID-224701, pp. 1-10, (2007)., 2007.06.
31. Dong-Mei Luo, Wen-Xue Wang, Yoshihiro Takao and Koichi Kakimoto, The Application of Homogenization Method on the Evaluation and Analysis of the Effective Stiffness for Non-continuous Carbon nano-tube/polymer Composites, Polymer Composites, Vol. 26, No. 5, pp. 688-695, (2007)., 2007.06.
32. Dong-Mei Luo, Wen-Xue Wang, Yoshihiro Takao, Effects of the Distribution and Geometry of Carbon Nanotubes on the Macroscopic Stiffness and Microscopic Stresses of Nanocomposites, Composites Science and Technology, Vol. 67, No.14, pp. 2947-2958, (2007)., 2007.06.
33. W.X. Wang, Y. Takao, I. Kashima, T. Matsubara, CFRP/Al-FRML Based on Nano-composite Coating and Its Mechanical Properties, American Institute of Aeronautics and Astronautics, AIAA Paper, No. 2007-2268, 2007.04.
34. W.X. Wang, Y. Takao, T. Matsubara, Development of carbon fiber reinforced aluminum laminates, Characterizations and Applications of Composites (Edited by Y. Zhang and Q.Q. Ni) China Agricultural Science and Technology Press (2006), pp. 94-103, 2006.08.
35. Dongmei Luo, Wen-Xue Wang, Yoshihiro Takao and Koichi Kakimoto, The numerical prediction of effective properties of non-continuous carbon nano-reinforced composites by Macro-microscopic homogenization method, Computational Method in Engineering and Sicence, EPMESC X,Tsinghua University Press & Springer, pp. 823-838, 2006.08.
36. Wen-Xue Wang, Dongmei Luo, Yoshihiro Takao and Koichi Kakimoto,, New Solution Method for Homogenization Analysis and its Application to the Prediction of Macroscopic Elastic Constants of Materials with Periodic Microstructures, Computer & Structure, 84, pp. 991-1001, 2006.04.
37. D.M. Luo, W.X. Wang, Y. Takao, K. Kakimoto, Prediction of stiffness and stresses for carbon nano-tube composites based on homogenization analysis, 九州大学応用力学研究所, No. 129, pp 37-46, 2005.09.
38. W. X. Wang, D. M. Luo, Y. Takao and K. Kakimoto, Numerical prodiction of the stiffness and local stresses fornano-composites with periodic distributions of nanotubes, Proceedings of ICCM-15, Proceedings of ICCM-15, Durban, South Africa, CDROM ID-p02l, pp. 1-10, (2005)., 2005.07.
39. S. Baba, Y. Takao, W. X. Wang and T. Matsubara, Effects of anodizing on the interlaminar shear strength of carbon fiber reinforced aluminum laminates, Proceeding of the 5th Korea/Japan Joint Workshop on Aeronautics and Astronautics, Proceeding of the 5th Korea/Japan Joint Workshop on Aeronautics and Astronautics, pp. 1-6, (2004)., 2004.07.
40. W.X. Wang and Y. Takao, Isoparameteric Finite Point Method in Computational Mechanics, Computational Mechanics, 10.1007/s00466-004-0547-3, 33, 6, 481-490, Vol. 33, pp. 481-490, (2004)., 2004.01.
41. W.X. Wang, Y. Takao and M. Nakata, Effects of friction on the measurement of the mode II interlaminar fracture toughness of composite laminates, Proceedings of ICCM-14, San Diego, CDROM ID-1409, pp. 1-8,, 2003.07.
42. W. X. Wang and Y. Takao, Effects of friction on the experimental evaluation of the mode II interlaminar fracture toughness of composite laminates, Proceeding of the Third Japan-Canada Joint Conference, 2003.03.
43. H.-S. Kim, W.X. Wang, Y. Takao, and G. Ben, Effects of temperature on mode II fracture toughness of multidirectional CFRP laminates, INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 10.1142/S0217979203019563, 17, 8-9, 1717-1723, 17 (8-9): 1717-1723 Part 2,, 2003.01.
44. W. X. Wang, Y. Takao, T. Matsubara and H.S. Kim, Improvement of the interlaminar fracture toughness of composite laminates by whisker reinforced interlamination, Composites Science and Technology, 10.1016/S0266-3538(02)00052-0, 62, 6, 767-774, 62, pp. 767-774,, 2002.01.
45. H.-S. Kim, W.X. Wang and Y. Takao, , Effects of temperature and fiber orientation on mode II fracture behavior of carbon/epoxy composit, Proceedings of 5th International Conference on Durability Analysis of Composite Systems,, Tokyo, pp. 377-383,, 2001.11.
46. W. X. Wang, K. Iihoshi, T. Matsubara and Y. Takao, Tensile Properties of C/C and Metal Impregnated C/C Composites, Proceedings of ICCM-13, Beijing, CDROM ID-1432, pp. 1-8,, 2001.01.
47. T. Matsubara, Y. Takao, W. X. Wang and S. Hanzawa, Effects of Contact Pressure and Reciprocation Number on the Coefficients of Friction of Carbon/Carbon
Composites with Metal Impregnation, Proceedings of The second Asia-Australasian Conference on Composite Materials (ACCM-2000), Kyongju, Korea, Vol. 2, pp. 701-706,, 2000.08.
48. Qing-Qing Ni, N. Ohsako, T. Ohki, M. Sakaguchi, W.X. Wang, M. Iwamoto, Development of Smart Composites Based on Shape Memory Polymer, International Symposium on Smart Structures & Microsystems (IS3M), Hong Kong, C2-1, pp. 1-6,, 2000.07.
49. W.X. Wang, Y. Takao, T. Matsubara and H.-S. Kim, Interlaminar Fracture Toughness of Composite Laminates with Whisker Reinforced Interlamination, Proceeding of the 9th US-Japan Conference on Composite Materials, Mishima, pp. 323-330,, 2000.07.
50. N. Hirano, S. Matsunaga, W.X. Wang, T. Matsubara and Y. Takao, Three-Dimensional Investigation of the Bearing Failure Mode of Quasi-isotropic CF/Epoxy Laminates under Various Environmental Temperatures, Proceedings of ICCM-13, Beijing, CDROM ID-1451, pp. 1-10,, 2000.06.
51. Y. Xiao, W.X. Wang and Y. Takao, The Effective Friction Coefficient of a Laminate Composite, and Analysis of Pin-Loaded Plates, Journal of Composite Materials, 10.1106/V82B-A1BB-9PWR-MXTC, 34, 1, 69-87, Vol. 34, pp. 70-87,, 2000.06.
52. H.S. Kim, W.X. Wang and Y. Takao, Effects of Temperature and Stacking Sequence on the Mode I Interlaminar Fracture Behavior of Composite Laminates, Key Engineering Materials, 183-1, 815-820, Vols. 183-187, pp. 815-820,, 2000.01.
53. W.X. Wang、F.G.Yuan and Y. Takao, A Unified Loading Parameter for Creep Crack Growth, Proc. R. Soc. Lond. A, 10.1098/rspa.2000.0512, 456, 1993, 163-183, Vol. 456, pp. 163-183,, 2000.01.
54. H.-S. Kim, W.X. Wang and Y. Takao, Effects of Temperature and Fiber Orientation on the Mode I Interlaminar Fracture Toughness of Carbon/Epoxy Composites, Proceedings of ICCM-12, CDROM Paper No.276, pp. 1-10,, 1999.07.
55. H.-S. Kim, W.X. Wang and Y. Takao, Mode I interlaminar fracture toughness of a DCB specimen with edge delamination – effects of temperature and fiber
orientation –, Proceedings of the Sixth Japan International SAMPE Symposium, Tokyo, Vol. 1, pp. 97-100,, 1999.10.
56. W.X. Wang, Y. Takao, T. Matsubara and K.-S. Kim, Interlaminar Reinforcement to Composite Laminates by Distributing Whiskers Along the Interface, Proceedings of ICCM-12, Paris, CDROM Paper No.205, pp. 1-7,, 1999.07.
57. H.-S. Kim, W.X. Wang and Y. Takao, Evaluation by FEM of temperature-dependent damage behavior in quasi-isotropic carbon/epoxy laminates, Adv. Composite Mater., 8, 3, 247-257, Vol.. 8, No. 3, pp. 247-257,, 1999.06.
58. T. Otsu, W.X. Wang and Y. Takao, Asymmetrical Cracks Parallel to an Interface between Dissimilar Materials, International Journal of Fracture, 10.1023/A:1018769902240, 96, 1, 75-100, Vol. 96, pp. 75-100,, 1999.04.
59. H.-S. Kim, W.X. Wang and Y. Takao, Temperature-Dependent Damage Behaviors in CFRP Laminated Plates-Evaluation by FEM, Proceedings of 8-th Japan-U.S. Conference on Composite Materials, 743-752, Baltimore, Maryland, pp. 743-752,, 1998.09.
60. W.X. Wang, Y. Takao, F.G. Yuan, B.D. Potter, and R.H. Pater, The Interlaminar Mode-I Fracture of IM7/LARC-RP46 Composites at High Temperatures, Journal of Composite Materials, 32, 16, 1508-1526, Vol. 32, pp. 1508-1526,, 1998.04.
Presentations
1. WENXUE WANG, Terutake Matsubara, Jun-Feng Hu, An approximate method for the fluid-structure coupling analysis of a flexible plate normal to the fluid flow, WORLD RENEWABLE ENERGY CONGRESS 13- WREC XIII, 2014.08, This paper aims to develop an approximate analysis method for the evaluation of the averaged pressure acting on a flexible plate normal to the wind flow. The average pressure is defined by the total normal force acting on the deformed plate divided by the area of the plate. The total normal force depends on the wind velocity and deformation of the plate. A theoretical formulation is proposed to describe the relationship between the normal drag coefficient of a curved rigid-plate and the configuration of the plate. Based on this relationship, an approximate method using only the iteration of structure mechanics analysis is constructed to evaluate the deformation of a flexible plate and the averaged wind pressure acting on the plate, instead of conventional complex iterations of fluid-structure coupling analysis. Computational simulations for 2-dimensional and 3-dimensional models of flexible plates are performed for various wind velocities. Numerical results of the averaged wind pressure obtained from the approximate method agree well with those obtained from the fluid dynamics analysis of rigid-plates with the same configurations which are determined from the iterative analysis of structure mechanics. .
2. Hang Li, WANG WENXUE, 松原 監壮, Damage Progress in Newly Designed UACS Laminates, 第9回日韓複合材料ジョイントシンポジウム, 2013.09.
3. 松原 監壮, WANG WENXUE, 高雄 善裕, 安田 賢三, 林良輔, Effects of the cure pressure on the interlaminar shear strength of CFRP-steel hybrid laminate cured by hot pressing for a short time, THE 19TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS (ICCM-19), 2013.07.
4. Hang Li, WANG WENXUE, 松原 監壮, Damage Progression in Unidirectionally Arrayed Chopped Strands Laminates with Different Slit Patterns under Tension, 2013 International Conference on material Sciences and Technology (MST-S), 2013.05.
5. Smart thin film sensor of mechanoluminescence (ML) material SrAl2O4:Eu/polyme is a new strain sensor. The sensor will emit visual light when the structure is subjected to stresses. The light intensity is proportional to the strain energy density and the equivalent strain of the stressed material based on the energy viewpoint and experimental facts. The distribution of visual light intensity is recorded using CCD camera or ordinary camera. Then the stress distribution can be evaluated from the distribution of visual light intensity based on solid mechanics and the relationship between light intensity and equivalent strain. Compression test of a disk with coated SrAl2O4:Eu/epoxy film sensor is conducted to compare the visual light distribution with the stress distribution obtained from finite element analysis. tensile test of a rectangular specimen with a coated SrAl2O4:Eu/polymer film sensor is performed to demonstrate the relationship between visual light intensity and strain. Experimental and numerical results show that the smart sensor of ML material SrAl2O4:Eu/polymer is an effective stress sensor to directly visualize the stress distribution in real time..
6. Alignment control of Carbon Nanotube/Epoxy composites by AC electric field.
7. This research is about the analysis and reduction of thermal residual stress in CFRP/Al laminates (CARALL), which is fabricated by carbon fiber reinforced plastic (CFRP) combined with aluminum alloy (AL). Large thermal residual stress in the aluminum alloy is generated during the curing process of CARALL due to the large mismatch of the coefficient of thermal expansion (CTE) between CFRP and aluminum alloy. Several methods are investigated to determine the thermal residual stress in CFRP/Al laminates and different temperature profiles are investigated to reduce the actual bonding temperature between CFRP and AL layers, since the thermal residual stress is determined by the difference between actual bonding temperature and room temperature..
8. This paper describes a study on the application of smart mechanoluminescence (ML) sensor [1] to structures for the visualization of stress distribution. Smart thin film sensor of ML material SrAl2O4:Eu/polyme is coated on the surface of structure. The sensor will emit visual light when the structure is subjected to stresses. The light intensity is proportional to the strain energy density and the equivalent strain of the stressed material based on the energy viewpoint and experimental facts. The distribution of visual light intensity is recorded using CCD camera or ordinary camera. Then the stress distribution can be evaluated from the distribution of visual light intensity based on solid mechanics and the relationship between light intensity and equivalent strain. Compression test of a disk with coated SrAl2O4:Eu/epoxy film sensor is conducted to compare the visual light distribution with the stress distribution obtained from finite element analysis. Furthermore, tensile test of a rectangular specimen with a coated SrAl2O4:Eu/polymer film sensor is performed to investigate the effect of strain rate on the light intensity. Experimental and numerical results show that the smart sensor of ML material SrAl2O4:Eu/polymer is an effective stress sensor to directly visualize the stress distribution in real time..
9. This paper describes a study on the application of smart mechanoluminescence (ML) sensor to structures for the visualization of stress distribution. Smart thin film sensor of ML material SrAl2O4:Eu/polyme is coated on the surface of structure. The sensor will emit visual light when the structure is subjected to stresses. The light intensity is proportional to the strain energy density and the equivalent strain of the stressed material based on the energy viewpoint and experimental facts. The distribution of visual light intensity is recorded using CCD camera or ordinary camera. Then the stress distribution can be evaluated from the distribution of visual light intensity based on solid mechanics and the relationship between light intensity and equivalent strain. Compression test of a disk with coated SrAl2O4:Eu/epoxy film sensor is conducted to compare the visual light distribution with the stress distribution obtained from finite element analysis. Furthermore, tensile test of a rectangular specimen with a coated SrAl2O4:Eu/polymer film sensor is performed to demonstrate the relationship between visual light intensity and strain. Experimental and numerical results show that the smart sensor of ML material SrAl2O4:Eu/polymer is an effective stress sensor to directly visualize the stress distribution in real time..
10. In this paper, the main attention is focused on the galvanic corrosion problem of carbon fiber metal laminate (CARALL). A galvanic corrosion resistant CARALL is developed based on nanocomposite coating. CARALL is composed of CFRP layers and aluminum alloy layers. T300/#2580 prepreg is used as CFRP layer. Aluminum alloy sheet of 2024-T3 is selected as the metal layer. Nanocomposite coating consists of a sulfuric acid anodizing and a silica nano-particle reinforced hybrid sol-gel coating, and the composite coating is conducted on the surface of 2024-T3 to prevent the galvanic corrosion between carbon fiber and aluminum alloy. Effect of silica nano-particles on the properties of corrosion resistance is investigated by electrochemical tests. The cross-section of fabricated CARALL is investigated by scanning electron microscope (SEM) and electron probe micro analyzer (EPMA). Corrosion and mechanical tests are also conducted. Good corrosion resistance and proper interlaminar shear strength for CARALL are obtained..
11. A hand made nano-whisker reinforced glass ceramics used for the artificial crown is developed. Commercially available white nano-whiskers 9Al2O32B2O3 and dental glass-ceramic powders of porcelain AAA are used as reinforcement and matrix, respectively. A wet mixing process is conducted to ensure a homogeneous distribution of whiskers in the whisker/powder mixture by the use of a mortar. The remaining hand made procedures and the heating process of nano-whisker reinforced glass ceramics are the same as those of glass ceramics without whiskers used by ordinary dental technicians. The hand made ceramics specimens are investigated by means of SEM, EPMA, hardness tester and testing machine for various whisker weight fractions. Slight increase in flexural stiffness and strength and moderate increase in fracture toughness are observed. The reinforcement does not give serious damage if the weight fraction of whiskers is less than 7%..
12. In this paper, mode I fracture toughness of a low cost carbon-carbon composite (C/C) and liquid metal infiltrated composites Si-C/C and Cu-C/C are investigated based on compact tension test. Si-C/C and Cu-C/C are manufactured by infiltrating liquid silicon and copper into the low cost C/C [1], respectively, to make the densification of porous C/C, and to improve the oxidation resistance and the frictional and wearing properties of C/C for various potential applications under high temperature and frictional environments. Experimental results and analysis of microstructures of three composites reveal that the infiltration of liquid metal into C/C significantly influences the fracture toughness of the composite. The metal infiltration into C/C causes lower fracture toughness than original C/C. In particular, silicon infiltrated composite Si-C/C appears very low fracture toughness..
13. Fiber metal laminates (FML) are composed of alternating layers of fiber reinforced plastic (FRP) and aluminum alloy sheets. They have been developed because of their high mechanical properties compared with original materials of FRP and aluminum alloy. [1] However, stacking carbon fiber reinforced plastic (CFRP) with aluminum alloy causes a galvanic corrosion problem due to the differences of natural potentials of CFRP and aluminum alloy. In order to solve this problem, a composite coating for aluminum alloy was developed in previous researches. [2] The composite coating contains a sulfuric acid anodizing and silica nano-particles reinforced hybrid sol-gel coating. In this paper, we report effect of silica nano-particles on corrosion resistance of CFML (Carbon Fiber Metal Laminate). Electrochemical tests are employed to evaluate the corrosion resistance of the composite coatings..
14. In this paper, three-point and five-point bend tests for evaluating the interlaminar shear strength (ILSS) of carbon fiber aluminum laminates (CFML) are investigated. CFML is a kind of fiber metal laminate (FML) and consists of carbon fiber reinforced polymer layers and metal layers. Aluminum alloy sheet of 0.5 mm thickness is selected as the metal. General formulae for the evaluation of ILSS of CFML from three-point and five-point bend tests are presented. Three-point and five-point bend tests and elastoplastic finite element analysis are conducted and the results of two kinds of bend tests are compared. It is found that five-point bend test gives more accurate evaluation for the ILSS of CFML than three-point bend test in the case of that the interface is not located at the neutral plane..
15. This report describes a study on the application of mechanoluminescence material to the evaluation of stress distribution of structures. Experimental and analysis are performed to investigate the feasibility of this unique mechanoluminescence material for the stress evaluation of practical structures. Several simple example are presented to show the relationship between mechanoluminescence intensity and stress. Experimental and analytical results suggest that this unique material can be utilized as a stress sensors and is able to play a new role in the health monitoring system of structures after further researches..
16. In this paper, a galvanic corrosion-resistant carbon fiber metal laminate (CARALL) is developed. Aluminum alloy 2024-T3 is selected as the metal layer. A surface treatment technique combining a sulfuric acid anodizing with a hybrid sol-gel coating for the aluminum alloy is developed to prevent CARALL from galvanic corroding. Electrochemistry tests are conducted to evaluate the properties of electrochemistry of aluminum alloy treated by the present method. The test results prove that the combination of sulfuric acid anodizing and hybrid sol-gel coating can provide good protection against the galvanic corrosion in CARALL. Moreover, aluminum alloy sheets and carbon fiber/epoxy prepreg are stacked and cured in an autoclave to fabricate CARALL. The cross-section of fabricated CARALL is investigated by scanning electron microscope (SEM) and electron probe micro analyzer (EPMA). Well bonded thin interlayer consisting of composite layers is formed between aluminum alloy and carbon fiber-reinforced epoxy layer. Corrosion tests of CARALL and aluminum alloy are conducted, the present CARALL shown excellent corrosion resistance. Three-point and five-point bend tests are conducted to evaluate the interlaminar shear strength of the CARALL..
Membership in Academic Society
  • Japan Society of Powder and Powder Metallurgy
  • Japan Society for Composite Materials
  • The Society of Materials Science, Japan
  • The Japan Society for Aeronautical and Space Sciences
Educational
Educational Activities
Undergraduate education course: Dynamics I, Engineering English
Graduate education course: Damage of materials, Strength of materials used in aircraft and aerospace structures
Social
Professional and Outreach Activities
Our Lab. conducted many joint-researches with local companies and also international universities. .