Researcher Database

（Last updated : 2025-04-07 14:10:58）　

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ITOH TAKAMOTO

Department / Course College of Science and Engineering Department of Mechanical Engineering

Title / Position Professor

Other Affiliations
1.	Research Organization of Science and Technology Research Center of Advanced Materials
2.	Graduate School of Science and Engineering

Academic background
1.	1990/04～1992/03	Doctoral Program (2nd Semester) │ Department of Mechanical Engineering │ Graduate School of Science and Engineering │ Ritsumeikan University │ Completed Dr.Engineering (Mechanics of materials and materials)
2.	1988/04～1990/03	Doctoral Program (1st Semester) │ Department of Mechanical Engineering │ Graduate School of Science and Engineering │ Ritsumeikan University │ Completed Mechanics of materials and materials
3.	～1988/03	Department of Mechanical Engineering │ Faculty of Science and Engineering │ Ritsumeikan University │ Graduated

Business career
1.	2013/04/01	Professor │ │ Ritsumeikan University
2.	1992/04/01 ～ 2013/03/31	│ │ University of Fukui

Committee and society
1.	2015/05	The Society of Materials Science, Japan Chair of The Committee on High Temperature Strength of Materials

Research activities
1.		The Japan Society of Mechanical Engineers
2.		Atomic Energy Society of Japan
3.		The Society of Materials Science, Japan

Research summary
Reliability and strength of materials under multiaxial loading This laboratory is carrying out many fatigue tests under multiaxial loadings for various materials, such as heat and corrosion registrant alloys used for high temperature component, light weight alloys and super alloys used for aircraft, low melting alloys used for electronic devices, etc. The fatigue tests were mainly performed under multiaxial loading at room and high temperatures. Based on the obtained test results, deformation and fracture behaviors are evaluated. Observations of crack and microstructure, analyses and evaluations of results and numerical analyses are also carried out, and then evaluation of strength and development of design criteria for fatigue strength are studied. For the multiaxial fatigue test, since special test equipment is needed, almost all the machines are the originally designed and fabricated testing equipment. New testing machines are also developed. Thus, the students can study not only materials and strength of material, but also programing of test controlling and hydraulic control system. In this laboratory, most important thing is to enjoy the research work.

Research summary(Photo/Image)
1. Multiaxial low cycle fatigue tests

Present specialized field
Materials/ Mechanics of materials (Keyword：Strength of Material, Fatigue of Metals)

Books
1.	2013/10	Factual Database on Tensile, Creep, Low Cycle Fatigue and Creep-fatigue of Lead and Lead-free Solders -Vol.I Tensile Test │ ,pp.総編集（編集長）
2.	2013/10	Factual Database on Tensile, Creep, Low Cycle Fatigue and Creep-fatigue of Lead and Lead-free Solders -Vol.II Creep Test │ ,pp.総編集（編集長）
3.	2013/10	Factual Database on Tensile, Creep, Low Cycle Fatigue and Creep-fatigue of Lead and Lead-free Solders -Vol.III Low Cycle Fatigue Test │ ,pp.総編集（編集長）
4.	2013/10	Factual Database on Tensile, Creep, Low Cycle Fatigue and Creep-fatigue of Lead and Lead-free Solders -Vol.IV Creep-fatigue Test │ ,pp.総編集（委員長）
5.	2004/12	“Factual Database on Creep and Creep-Fatigue Properties of Sn-37Pb and Sn-3.5Ag Solders”

Papers
1.	2025/02	Design of 20 mm-Sized Miniature Cruciform Creep Specimen │
2.	2024/06	Multiaxial creep–fatigue failure mechanism and life prediction of a turbine blade based on a unified numerical solution approach │ Fatigue Fract Eng Mater Struct │
3.	2024	Effect of Tungsten Addition on Microstructure and Creep Properties of Sintered 25Cr-20Ni-1.3Nb Austenitic Heat Resistant Steel │ J. Jpn. Soc. Powder Powder Metallurgy │
4.	2023/08/27	Novel fatigue life prediction approach combined with rain-flow cycle counting process for random multiaxial non-proportional loading │ Fatigue Fract Eng Mater Struct │ 46,pp.4392-4405
5.	2023/07	Fatigue Properties of AISI 316 and AISI 430 under Multiaxial Stress Conditions Combined Internal Pressure and Axial Load; A Study on Additional Hardening │ Proceedings ICEM20 - 20th International Conference on Experimental Mechanics │ ,pp.415-416
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Academic conference presentation
1.	2017/10/07	Notch Sensitivity and Crack Initiation Position Influence on Life Evaluation of Notched Specimens under Non-proportional Multiaxial Low Cycle Fatigue
2.	2017/08/24	Fatigue Testing and Evaluation of Fatigue Strength under Multiaxial Stress State; Why do we need fatigue testing?
3.	2017/06	Numerical Analysis of Multiaxial Low Cycle Fatigue of Notched Specimens Made by Stainless Steel 316L under Nonproportional Loading
4.	2017/04/14	Evaluation and visualization of multiaxial fatigue behavior under random non-proportional loading condition
5.	2017/04/13	Cracking directions in multiaxial low cycle fatigue at high and room temperatures
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Winning science prize
1.	2006/07	ASME ASME, Pressure Vessels ad Piping Division Certificate of Appreciation for Co-outstanding the Outstanding Codes and Standards Technical Paper

Grants-in-Aid for Scientific Research -KAKENHI-
1.	2007/04 ～ 2010/03	Fatigue Life Property and Design Procedure under Multiaxial Non-proportional Loading

Achievements of joint.Funded research
1.	2020/04/01 ～ 2022/12/31	Thermomechanical fatigue of nuclear power structure materials under multiaxial loading │ Other grants and subsidies