Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
MATSUDA Kazuki Last modified date:2022.09.14

Associate Professor / Department of Marine Systems Engineering / Faculty of Engineering


Papers
1. Tsukasa Shimooka, Koji Murakami, Kazuki Matsuda and Koji Gotoh, Experimental Investigation on Stress-Strain Relationship of Steel under Cyclic Loading, Proceedings of Japan Welding Society, Kyushu-chapter,No. 19 (2022), 1-4..
2. Kazuyuki Teratsuji, Tomoya Uchimura, Kazuki Matsuda and Koji Gotoh, Basic Study on Grain Refinement by Laser Irradiation for Fatigue Strength Improvement, Proceedings of Japan Welding Society, Kyushu-chapter,No. 19 (2022), 37-40..
3. Yong-Yi Feng, Norihiro Watanabe, Kento Yamazaki, Kazuki Matsuda, Koji Gotoh, A Study on Prediction of Fillet Weld Bead Shape Using Machine Learning with Welding Conditions and Welding Noise as Input Variables, Proceedings of Japan Welding Society, Kyushu-chapter,No. 19 (2022), 41-44..
4. Kazuki Matsuda, Shinji Kodama, Effect of the strength of steel sheets and wires on residual stress of thin steel sheet lap-fillet GMA weld joint, Welding International, https://doi.org/10.1080/09507116.2022.2030536, 36, 2, 97-113, 2022.02, [URL], Weld residual stress of the lap fillet GMA welding joints which was performed using two strength grades of steel sheets and two strength grades of welding wires were measured. In addition, to consider the effects of steel sheet strength and weld metal strength on welding residual stress, thermal elastoplastic analysis using FEM was carried out for the experiments. As a result of the analysis using the temperature history of the heat-affected zone as a fitting parameter, the residual stress distributions near the toe were in agreement with the measurement in the FE analysis. Comparing the residual stress distributions in the direction perpendicular to the weld line on the weld metal surface near the toe, which is the occurring point of fatigue cracks in the FE analysis results, with the same steel sheet, the higher the weld metal strength the smaller the tensile residual stress. And comparing with the same wire, the higher the steel sheet strength the higher the tensile residual stress. The reason for the former is that when using high-strength wire, cooling transformation occurs at a lower temperature than using low-strength wire. As a result, it is considered that the tensile residual stress was effectively reduced by causing transformation expansion while the surrounding strength was high. The reason for the latter is considered to be that each stress value changes based on the yield stress of the steel sheet and weld metal because the plastic strain continues to occur in each direction until transformation occurs after welding. It was considered that the larger the ratio of the hardness of the weld metal to the base metal, the smaller the ratio of the residual stress of the weld metal near the toe to the yield stress..
5. Kazuki Matsuda, Shinji Kodama, Effect of galvannealed coating on corona bond strength of resistance spot welding, Science and Technology of Welding and Joining, https://doi.org/10.1080/13621718.2021.2023964, 27, 2, 132-140, 2022.01, [URL], The effect of galvannealed (GA) coating on the corona bond strengths of resistance spot welding joints was investigated. A cross tensile test was performed with removal of the nugget, using GA steel sheets and steel sheets whose coating had been removed via pickling. The maximum load with coating was lower than that without coating. When the nugget diameter was small (3√t, t: sheet thickness), GA coating reduced the corona bond strength (MPa). In contrast, when the nugget diameter was large (5√t), GA coating did not change the corona bond strength but reduced the corona bond area..
6. Kazuki MATSUDA, Shinji KODAMA, Effect of the strength of steel sheets and wires on residual stress of thin steel sheet lap-fillet GMA weld joint, QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 2021 Volume 39 Issue 3 Pages 218-231., [URL].
7. Kazuki MATSUDA, Shinji KODAMA, Effect of the strength of steel sheet and wire on residual stress of thin sheet arc weld, Preprints of the National Meeting of JWS, 109, Pages 230-231, September 21 - 28, 2021., [URL].
8. Kazuki Matsuda, Shinji Kodama, Observation of fatigue microcracks and estimation of fatigue strength of a thin sheet arc welded part considering micro-ripples, International Journal of Fatigue, https://doi.org/10.1016/j.ijfatigue.2020.106087, 145, 2021.04, [URL], Fatigue tests were conducted on a thin sheet arc welded part using two types of welding wires. Microscopic observations of specimens tested at the fatigue limit stress revealed that microcracks were initiated in the micro-ripples on the weld metal surface. Furthermore, a coarse ferrite structure often contains existing microcracks. A method for quantitatively evaluating the effects of microscopic irregularities on the weld metal surface and macroscopic toe shape on the fatigue strength is proposed. It was found that microscopic irregularities on weld metal have a significant impact on the fatigue limit, depending on their metallurgical structure..
9. Kazuki MATSUDA, Shinji KODAMA, Observation of Micro Fatigue Cracks at Arc Welded Joint of Thin Steel Sheet (Report 2), Preprints of the National Meeting of JWS, Pages 164-165, September 09 - 11, 2020., [URL].
10. Kazuki MATSUDA, Shinji KODAMA, Observation of Micro Fatigue Cracks at GMA Welded Joint of Thin Steel Sheet, QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 2020 Volume 38 Issue 3 Pages 157-163., [URL].
11. Kazuki MATSUDA, Shinji KODAMA, Stress analysis of lap fillet joint using thin steel sheet, Preprints of the National Meeting of JWS, Pages 226-227, 2019, [URL].
12. Kazuki Matsuda, Shinji Kodama, Evaluation of corona bond strength of resistance spot welding, Science and Technology of Welding and Joining, https://doi.org/10.1080/13621718.2019.1613010, 25, 1, 66-72, 2019.05, [URL], A simple method to evaluate the strength of corona bond of resistance spot welding is proposed and verified by removing the nugget of welded specimen before conducting a cross tension test. The strength of the corona bond is evaluated using thin steel sheets of different strengths. The result indicates that the higher the strength of the steel sheet, the higher the strength of the corona bond. A tensile test of the corona bond part is conducted using the small tensile test technique to verify the corona bond strength. A comparison of the stress value at the same strain (1%) indicates that the stress of the small tensile test is in the order of the strength of the steel sheet..
13. Kazuki MATSUDA, Shinji KODAMA, Evaluation of Corona Bond Area Strength of Resistance Spot Welding, International Symposium on Joining Technologies in Advanced Automobile Assembly 2018, 41-42, 2018.11.
14. Kazuki Matsuda, Shinji Kodama, Evaluation of Corona Bond Area Strength of Resistance Spot Welding, Preprints of the National Meeting of JWS, Pages 240-241, 2018., [URL].
15. Kazuki Matsuda, Yoshinari Ishida, Shinji Kodama, Observation of Micro Cracks at Arc Welded Steel Sheet, Preprints of the National Meeting of JWS, Pages 18-19, 2017., [URL].
16. Kazuki Matsuda, Yoshinari Ishida, Shinji Kodama, Yasunobu Miyazaki, Evaluation of Fatigue Crack Propagation Properties of Thin Steel Plate welds, Preprints of the National Meeting of JWS, Pages 368-369, 2016., [URL].
17. Kazuki Matsuda, Koji Gotoh, A Study of Replacing Method to the Single-Frequency Stress History to the Superimposed Stress History with Multiple Frequency Components, Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers, Pages 489-492, 2015., [URL].
18. Kazuki Matsuda, Koji Gotoh, Numerical simulation of fatigue crack propagation under superimposed stress histories containing different frequency components with several mean stress conditions, Marine Structures, https://doi.org/10.1016/j.marstruc.2014.12.005, 41, 77-95, 2015.04, [URL], Fatigue crack propagation behavior under superimposed stress histories containing different frequency components with several mean stress conditions was investigated. Numerical simulation of fatigue crack propagation based on an advanced fracture mechanics approach using the RPG (Re-tensile Plastic zone Generating) stress criterion for fatigue crack propagation was improved to extract the effective part from the applied stress history for fatigue crack propagation. The parameter, which is based on the plastic hysteresis energy consumed in the vicinity of a crack tip, was applied and implemented into the numerical simulation code of fatigue crack propagation. Fatigue crack propagation tests under various superimposed stress conditions with several mean stress conditions were performed and compared with the fatigue crack propagation histories obtained from the improved numerical simulations. These comparisons show the validity of the proposed procedure for extracting the effective stress history from the superimposed stress histories with different frequency components and mean stresses. Additionally, practical fatigue strength evaluations based on the linear cumulative fatigue damage parameter were conducted to investigate the tendency of the fatigue damage value under these stress conditions..
19. Kazuki Matsuda, Koji Murakami, Koji Gotoh, Numerical Simulation of Fatigue Crack Propagation under Superimposed Stress Histories with Several Constant and Variable Mean Stresses, Journal of the Japan Society of Naval Architects and Ocean Engineers, 2014 Volume 20 Pages 119-125., [URL].
20. Koji Gotoh, Kazuki Matsuda, Numerical Simulation of Fatigue Crack Propagation under Variable Amplitude Loading Containing Two Different Frequency Components, Journal of the Japan Society of Naval Architects and Ocean Engineers, 2013 Volume 17 Pages 75-81., [URL].
21. Kazuki Matsuda, Koji Gotoh, Numerical Simulation of Fatigue Crack Propagation Under Simulated Whipping Loading Arising in Hull Structures, Volume 3: Materials Technology; Ocean Space Utilization, ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering (OMAE2013),, https://doi.org/10.1115/OMAE2013-10985, 3, 2013.06, [URL], Fatigue crack propagation behavior under simulated whipping loadings which contain two different frequency components is highlighted. Numerical simulation of fatigue crack propagation based on an advanced fracture mechanics approach using the RPG (Re-tensile Plastic zone Generating) stress criterion for fatigue crack propagation is improved to enable the extraction of the effective loading history. The critical value of the plastic hysteresis for the stress versus strain relationship occurring in the vicinity of a crack tip is defined as the control parameter for extracting the effective loading history. Comparison of fatigue crack propagation curves obtained from the improved numerical simulations with the measurements which were conducted by Sumi (2010) is performed. These comparisons show the validity of the proposed procedure for extracting the effective loading history from the superposed loading history containing different frequencies. In addition, imperfection of the S-N curves approach, which corresponds to the combination of the linear cumulative damage law and the loading cycle count by the rain flow method, is conducted..
22. Koji GOTOH,Kazuki MATSUDA,O KITAMURA, Numerical simulation of fatigue crack propagation under superposed loading histories with two different frequencies, HYDROELASTICITY 2012, 287-297, 2012.09.