Reports

1.	Fatigue Strength of Welded Joints Koji GOTOH Journal of the Japan Welding Society，Vol.78，No.7，pp.639-643，2009.
2.	Development of Numerical Simulation of Fatigue Crack Growth Koji GOTOH Journal of the Japan Welding Society，Vol.77，No.4，pp.273-277，2008.

Papers

1.	Koji GOTOH, Kazuki MATSUDA and O Kitamura,NUMERICAL SIMULATION OF FATIGUE CRACK PROPAGATION UNDER SUPERPOSED LOADING HISTORIES WITH TWO DIFFERENT FREQUENCIES,Proceedings of Hydroelasticity in Marine Technology 2012,pp.287-297,2012.09. .
2.	Koji GOTOH and Keisuke HARADA,Improvement of Fatigue Crack Growth Simulation Based on the Strip Yield Model Considering the Strain Hardening Effect of Materials,31st International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2012),OMAE2012-83664,2012.07. .
3.	Improvement of the Dugdale strip yield model considering the work hardening effect of materials, Keisuke HARADA and Koji GOTOH Journal of the Japan Society of Naval Architects and Ocean Engineers, Vol.14, pp.39-46. . .
4.	Koji GOTOH, Koji MURAKAMI and Yasuo NODA,Fatigue crack growht behaviour of A5083 series aluminium alloys and their welded joints,Journal of Marine Science And Technology,Vol.16,No.3,pp.343-353,2011.09. .
5.	Koji GOTOH, Keisuke HARADA and Yosuke ANAI,Estimation of the Shape Evolution and the Growth History of an Embedded Crack by Fatigue Loading,30th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2011),OMAE2011-49457,2011.06. .
6.	Yoich Sumi, Hiroshi Yajima, Masahiro Toyosada, Takao Yoshikawa, Shuji Aihara, Toshiyuki Matsumoto, Kazuhiro Hirota, Hideyuki Hirasawa, Masanobu Toyoda and Koji Gotoh,Overview of Japanese Joint Research Project on Safety-Related Issue of Extremely Thick Steel Plate Applied to Large Container Ships,Proceedings of 11th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS 2010),Vol.Vol.2,pp.980-989,2010.09. .
7.	Koji GOTOH and Keisuke HARADA,Numerical Simulation of Fatigue Crack Growth Based on Strip Yield Model Considering Work Hardening of Materials,29th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2010),OMAE2009-20726,2010.06. .
8.	Keisuke HARADA, Hirokazu TAKAHASHI, Koji GOTOH and Masahiro TOYOSADA,Estimation of Shape Evolution and Growth History of a Fatigue Crack Emanating from an Embedded Elliptical Defect,Proceedings of The 23rd Asian-Pacific Technical Exchange and Advisory Meeting on Marine Sturctures (TEAM 2009),pp.8-12,2009.12. .
9.	Koji GOTOH and Yukinobu NAGATA,Improvement of Slice Synthesis Methodology to Estimate Stress Intensity Factor of an Embedded Crack in Finite Body,Proceedings of 12th International Conference on Fracture (ICF 12),ICF12 T02.011,2009.07. .
10.	Koji GOTOH and Keisuke HARADA,Numerical Study of Enhancement of Fatigue Crack Propagation Life by Grain Refinement,Proceedings of The Nineteenth International Offshore and Polar Engineering Conference (ISOPE 2009),Vol.4,pp.435-439,The Seventh (2009) ISOPE High-Performance Materials Symposium,2009.06. .
11.	Stress Intensity Factor and Crack Opening Displacement in Elastic Condition for Embedded Cracks by Applying Slice Synthesis Methodology, Yukinobu NAGATA and Koji GOTOH, Journal of the Japan Society of Naval Architects and Ocean Engineering, Vol.9, ,2009, pp.191-199 [URL]. .
12.	A Calculation Method of Crack Opening Displacement \\by Using Slice Synthesis Methodology And Strip Yield Model for An Embedded Elliptical Crack in Elastic-Perfect Plastic Bodies with Finite Plate Thickness, Yukinobu NAGATA and Koji GOTOH, Journal of the Japan Society of Naval Architects and Ocean Engineering, Vol.9, ,2009, pp.201-209 [URL]. .
13.	Koji GOTOH and Yukinobu NAGATA,Applicability Evaluation of the Weight Function Based Strip Yield Model for an Embedded Crack Problem,28th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2009),OMAE2009-79562,2009.06. .
14.	Yukinobu NAGATA, Koji GOTOH and Masahiro TOYOSADA,Numerical Simulations of Fatigue Crack Initiation and Propagation Based on Re-tensile Plastic Zone Generating (RPG) Load Criterion for In-plane Gusset Welded Joints,Journal of Marine Science And Technology,Vol.14，No.1，pp.104-114,2009.02. .
15.	Koji GOTOH and Yukinobu NAGATA,Stress Intensity Factors for Three Dimensional Cracks by Applying Slice Synthesis Methodology,The Proceedings of The Eighteenth (2008) International Offshore and Polar Engineering Conference,Volume 4 (The Sixth (2008) ISOPE High-Performance Materials Symposium), pp.236-240,2008.07. .
16.	Koji GOTOH, Yukinobu NAGATA and Masahiro TOYOSADA,Fatigue life estimation for a long through thickness cracks in large-scale specimen in imitation of hull skin plate,Proceedings of the Seventeenth (2007) International Offshore and Polar Engineering Conference,Vol.4, pp.3343-3347,2007.07. .
17.	Koji GOTOH, Yukinobu NAGATA and Masahiro TOYOSADA,A Simple Estimation Method of the Stress Distribution Normal to Cross Section at Weld Toe in Non-Load Carrying Welded Joints,25th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2006),OMAE2006-92094,2006.06. .
18.	Masahiro Toyosada, Koji Gotoh, Keitaro Konuma and Akira Sueda,A Comparative Study of Computational Models for Fatigue Crack Propagation,Proceedings of International Conference on Computational and Experimental Engineering and Sciences,pp.1386-1391,2005.12. .
19.	Numerical Simulation of Fatigue Crack Initiation and Propagation for In-plane Gusset Welded Joints,. .
20.	Masahiro TOYOSADA and Koji GOTOH,Physical Meaning of the Fictitious Crack Opening Displaecement in Dugdale Model,Proceedings of 10th International Conference on Fracture,ICF11 4620,2005.03. .
21.	Masahiro TOYOSADA and Koji GOTOH,The Significance of Plastic Zone Growth under Cyclic Loading and Crack Opening / Closing Model in Fatigue Crack Propagation,Materials Science Forum,Vol.482,Vol.482, pp.95-102,2005.03. .
22.	A fatigue life prolonging method for welded built-up steel structures by the grain fining around weld toe Yukinobu NAGATA，Masahiro TOYOSADA，Koji GOTOH，Koji MURAKAMI Proceedings of Welded Built-up Structures Integrity Symposium 2004, Japan Welding Society, pp.343-346. .
23.	Masahiro TOYOSADA, Koji GOTOH and Toshio NIWA,Fatigue life assessment for welded structures without initial defects: an alogrithm for predicting fatigue crack growth from a sound site,International Journal of Fatigue,Vol.26,No.9,Vol.26, No.9, pp.993-1002,2004.09. .
24.	Masahiro TOYOSADA, Koji GOTOH and Toshio NIWA,Fatigue crack propagation for a through thickness crack: a crack propagation law consdering cyclic plasticity near the crack tip,International Journal of Fatigue,Vol.26,No.9,Vol.26, No.9, pp.983-992,2004.09. .
25.	Masahiro TOYOSADA and Koji GOTOH,Investigation of Enhancement of Fatigue Strength for Welded Built-up Structures by Flame Line heating,Advances in Computational Engineering and Science, Proceedings of the 2002 International Conference on Computational Engineering and Science (ICES'2002),2002.07. .
26.	Koji GOTOH and Masahiro TOYOSADA,A Practical Estimation Method of the Skin Plate Distortion Caused by Fillet Weld,Proceedings of the 21st International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2002),OMAE2002-28181,2002.06. .
27.	Masahiro TOYOSADA, Koji GOTOH and Shin NAKAYAMA,A Study of Crack Depth Effect and Scattering of Fracture Toughness in Three Point Bend COD Specimens,Advances in Fracture Research, Proceedings of 10th International Conference on Fracture,ICF10 737,2001.12. .
28.	Masahiro TOYOSADA, Koji GOTOH, Yasunari WATANABE and Shin NAKAYAMA,Evaluation of a Brittle Fracture Accident that Occurred at the Hyogo-Ken Nanbu Earthquake,Advances in Fracture Research, Proceedings of 10th International Conference on Fracture,ICF10 148,2001.12. .
29.	Development of Evaluation Parameter for Fracture Toughness Based on Statistical Mechanics, Journal of the Society of Naval Architects of Japan, Vol.190. .
30.	Ragnar T. Igrand, Svein Saevik, Yong Bai, Stig Berge, Leif Collberg, Koji GOTOH, Philippe Mancon and Christian Thaulow,Deepwater Pipelines and Flowlines,Proceedings of Offshore Technology Conference,OTC 12187,2000.05. .
31.	Evaluation of Brittle Fracture Accidents Occurred at the Hyogo-Ken Nanbu Earthquake, Journals of the Japan Society of Civil Engineers, No.647 / I-51. .
32.	A Study on Deformation due to Thermal Cutting, Transactions of the West-Japan Society of Naval Architects, No.99. .
33.	Masahiro TOYOSADA and Koji GOTOH,Strength Evaluation Method for Brittle Fracture at Arbitrary Strain Rates,PVP Vol.380 Fitness-for-Service Evaluations in Petroleum and Fossil Power Plants, ASME,pp.111-118,1998.07. .
34.	Masahiro TOYOSADA and Koji GOTOH,Effect of Welding Sequence and Line Heating on Fatigue Strength for Welded Structures,Proceedings of 17th International Conference on OMAE,OMAE98-2152,1998.07. .

Presentations

1.	Overview of Japanese Joint Research Project on Safety-Related Issue of Extremely Thick Steel Plate Applied to Large Container Ships Yoich Sumi, Hiroshi Yajima, Masahiro Toyosada, Takao Yoshikawa, Shuji Aihara, Toshiyuki Matsumoto, Kazuhiro Hirota, Hideyuki Hirasawa, Masanobu Toyoda and Koji Gotoh 11th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS 2010).
2.	Improvement of Slice Synthesis Methodology to Estimate Stress Intensity Factor of an Embedded Crack in Finite body Koji GOTOH and Yukinobu NAGATA The 12th International Conference on Fracture (ICF 12) Session T02-S3 Analytical Models .
3.	Applicability Evaluation of the Weight Function Based Strip Yield Model for an Embedded Crack Problem Koji GOTOH and Yukinobu NAGATA The 28th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2009) Session 3-6: Advances in Fracture, Fatigue and Sealing Analysis.
4.	Stress Intensity Factors for Three Dimensional Cracks by Applying Slice Synthesis Methodology Koji GOTOH and Yukinobu NAGATA The Eighteenth (2008) International Offshore and Polar Engineering Conference (ISOPE 2008).
5.	A Simple Estimation Method of the Stress Distribution Normal to Cross Section at Weld Toe in non-load carrying welded joints.
6.	A Comparative Study of Computational Models for Fatigue Crack Propagation.
7.	Physical Meaning of the Fictitious Crack Opening Displaecement in Dugdale Model.

[Gracuate school, Master course]
Advanced Course in Welded Structures
Advanced Course in Fracture Control Design

[Undergraduate]
Materials and Production in Large welded built-up sturctures
Fracture Control Design
Naval Architecture and Marine Systems Engineering Laboratories (Round bar tensile tests)
Introduction to Earth, Civil and Energy Sciences and Engineering
Core Seminar in Earth, Civil and Energy Sciences and Engineering

ISSC 2003 (15th International Ship and Offshore Structures Congress) Observer
ISSC 2006 (16th International Ship and Offshore Structures Congress) Observer
ISSC 2009 (17th International Ship and Offshore Structures Congress) Observer