Developments of Damage Model and Analytical Tool for Evaluation of Fatigue Strength under Multiaxial Random Loading

• Project/Area Number: 24560092
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Ritsumeikan University (2013-2014); University of Fukui (2012)
• Principal Investigator: ITOH Takamoto 立命館大学, 理工学部, 教授 (40242581)
• Co-Investigator(Renkei-kenkyūsha): SAKANE Masao 立命館大学, 理工学部, 教授 (20111130) ; YAMAMOTO Takaei 大分大学, 工学部, 助教 (20295166) ; HIYOSHI Noritake 石川工業高等専門学校, 機械工学科, 講師 (30342489)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 疲労 / 低サイクル疲労 / 多軸応力 / 金属疲労 / 多軸負荷 / 疲労損傷 / 寿命評価 / 解析ソフト

Outline of Final Research Achievements

This study presented a simple method of determining stresses and strains and a severity of loading history under non-proportional loadings with defining the rotation angles of the maximum principal stress and strain in a three dimensional stress and strain space. Based on this method, an analytical program for visually presenting the stress/strain state, the non-proportionality of loading, and the damage evaluation was developed. It will be possible for researchers and engineers to assess the fatigue strength under non-proportional loading without requiring special knowledge and judgment about multiaxial loading.

Research Products

• [Journal Article] Effect of multiaxial stress on low cycle fatigue (2015)
  • Author(s): Masao Sakane, Takamoto Itoh, Hideyuki Kanayama
  • Journal Title: Mechanical Engineering Reviews Volume: 2 Issue: 1 Pages: 14-00214-14-00214
  • DOI: 10.1299/mer.14-00214
  • NAID: 130004709951
  • ISSN: 2187-9753
  • Peer Reviewed / Open Access
• [Journal Article] Corrosion fatigue behaviour of 304 stainless steel under proportional and non-proportional multiaxial loading condition (2014)
  • Author(s): Y-H. Huang, S-T. Tu, F-Z. Xuan and T. Itoh
  • Journal Title: Fatigue & Fracture of Engineering Materials & Structures Volume: 37 Pages: 436-445
  • Peer Reviewed / Open Access
• [Journal Article] Development of thermal fatigue evaluation methods of piping systems (2014)
  • Author(s): Naoto Kasahara, Takamoto Itoh, Masakazu Okazaki, Yukihiko Okuda, Masayuki Kamaya, Akira Nakamura, Hitoshi Nakamura, Hideo Machida and Masaaki Matsumoto
  • Journal Title: E-Journal of Advanced Maintenance, Japan Society of Maintenology Volume: 6 Pages: 14-23
  • Peer Reviewed / Open Access
• [Journal Article] High temperature nonproportional low cycle fatigue using fifteen loading paths (2014)
  • Author(s): Naomi Hamada, Masao Sakane, Takamoto Itoh, Hideyuki Kanayama
  • Journal Title: Theoretical and Applied Fracture Mechanics Volume: 73 Pages: 136-143
  • DOI: 10.1016/j.tafmec.2014.07.006
  • Peer Reviewed / Open Access
• [Journal Article] Low Cycle Fatigue Damage of Mod.9Cr-1Mo Steel under Non-proportional Multiaxial Loading (2013)
  • Author(s): Takamoto Itoh, Kenichi Fukumoto, Hideki Hagi, Akira Itoh, Daichi Saitoh
  • Journal Title: Procedia Engineerin Volume: 55 Pages: 457-462
  • DOI: 10.1016/j.proeng.2013.03.280
  • Peer Reviewed
• [Journal Article] Multiaxial Low Cycle Fatigue Life under Non-proportional Loading (2013)
  • Author(s): Takamoto Itoh, Masao Sakane, Kazuki Ohsuga
  • Journal Title: International Journal of Pressure Vessels and Piping Volume: 110 Pages: 50-56
  • DOI: 10.1016/j.ijpvp.2013.04.021
  • Peer Reviewed
• [Journal Article] Development of fatigue life evaluation method using small specimen (2013)
  • Author(s): Shuhei Nogami, Arata Nishimura, Eichi Wakai, Hiroyasu Tanigawa, Takamoto Itoh, Akira Hasegawa
  • Journal Title: Shuhei Nogami, Arata Nishimura, Eichi Wakai, Hiroyasu Tanigawa, Takamoto Itoh, Akira Hasegawa Volume: 441 Issue: 1-3 Pages: 125-132
  • DOI: 10.1016/j.jnucmat.2013.05.051
  • Peer Reviewed
• [Journal Article] Definition of Stress and Strain Ranges for Multiaxial Fatigue Life Evaluation under Non-Proportional Loading (2013)
  • Author(s): 伊藤隆基, 坂根政男, 清水祐太
  • Journal Title: 材料（高温特集号） Volume: 62 Pages: 117-124
  • NAID: 130004481090
  • Peer Reviewed
• [Journal Article] 改良9Cr-1Mo鋼の非比例多軸低サイクル疲労強度評価 (2013)
  • Author(s): 伊藤隆基, 福元謙一, 羽木秀樹, 伊藤晃, 齋藤大地
  • Journal Title: 材料（高温特集号） Volume: 62 Pages: 110-116
  • NAID: 130003367127
  • Peer Reviewed
• [Journal Article] 非比例多軸負荷における負荷経路の可視化手法および設計手法の開発 (2013)
  • Author(s): 中村寛, 高梨正祐, 伊藤隆基, 呉敏, 坂根政男
  • Journal Title: 機械学会論文集（A編） Volume: 79 Pages: 110-116
  • NAID: 130003374596
  • Peer Reviewed
• [Journal Article] Low Cycle Fatigue Life of Ti-6Al-4V alloy under Non-proportional Loading (2012)
  • Author(s): Min Wu, Takamoto Itoh, Yuuta Shimizu, Hiroshi Nakamura, Masahiro Takanashi
  • Journal Title: International Journal of Fatigue Volume: 44 Pages: 14-20
  • Peer Reviewed
• [Presentation] 非比例多軸負荷における疲労強度評価のための解析ツールの開発 (2014)
  • Author(s): 森下高弘, 伊藤隆基, 劉淑莉, 坂根政男
  • Organizer: 日本材料学会 第63期講演会
  • Place of Presentation: 福岡大学（福岡県・福岡市）
  • Year and Date: 2014-05-17 – 2014-05-18
• [Presentation] 予き裂を有するSUS316鋼およびSTPT410鋼の多軸低サイクル疲労強度 (2014)
  • Author(s): 森下高弘, 伊藤隆基
  • Organizer: 日本材料学会 第63期講演会
  • Place of Presentation: 福岡大学（福岡県・福岡市）
  • Year and Date: 2014-05-17 – 2014-05-18
• [Presentation] 炭素鋼S45Cの多軸低サイクル疲労に及ぼす水素の影響 (2014)
  • Author(s): 山本卓, 岩崎風人, 堤紀子, 山本隆栄, 伊藤隆基
  • Organizer: 日本材料学会 第63期講演会
  • Place of Presentation: 福岡大学（福岡県・福岡市）
  • Year and Date: 2014-05-17 – 2014-05-18
• [Presentation] 先進型高速炉実用化に向けた保全技術開発；2. 高温多軸疲労損傷機構の解明と損傷評価 (2013)
  • Author(s): 伊藤隆基，全立新，包振龍，藤原悠輝
  • Organizer: 日本原子力学会「2013年春の年会」
  • Place of Presentation: 近畿大学（大阪府東大阪市）
• [Presentation] 変動非比例負荷応力場でのTi-6Al-4Vの非比例損傷評価 (2012)
  • Author(s): 高梨正祐，中村寛，呉敏，伊藤隆基
  • Organizer: 日本機械学会2012年度年次大会
  • Place of Presentation: 金沢大学（石川県金沢市）
• [Presentation] Evaluation of Multiaxial Low Cycle Fatigue Life under Non-proportional Loading
  • Author(s): Takamoto Itoh, Masao Sakane
  • Organizer: 10th Int. Conf. On Multiaxial Fatigue & Fracture
  • Place of Presentation: 立命館大学（京都府）
  • Invited
• [Presentation] Effect of Pre-inelastic Multiaxial Loading on High Cycle Fatigue Strength
  • Author(s): Kazuki Ohsuga, Takamoto Itoh
  • Organizer: 7th Int. Conf. on Low Cycle Fatigue
  • Place of Presentation: Aachen, Germany
• [Presentation] Low Cycle Fatigue Lives under Multiaxial Non-proportional Loading
  • Author(s): Takamoto Itoh, Zhenlong Bao
  • Organizer: 7th Int. Conf. on Low Cycle Fatigue
  • Place of Presentation: Aachen, Germany
• [Presentation] Visualization of Multiaxial Stress/Strain State and Evaluation of Failure Life by Developed Analyzing Program under Non-proportional Loading
  • Author(s): Shuli Liu, Takamoto Itoh, Noriyuki Fuji
  • Organizer: 11th Int. Fatigue Conf.
  • Place of Presentation: Melbourn, Austraria
• [Presentation] Low Cycle Fatigue Lives under Wide Ranged Multiaxial Non-proportional Loading
  • Author(s): Takamoto Itoh
  • Organizer: International session of the 8th National Conference on Pressure Vessels Technology
  • Place of Presentation: Hefei, China
  • Invited
• [Presentation] 非比例多軸負荷における疲労強度評価のための応力・ひずみの可視化・解析ツールの開発
  • Author(s): 劉淑莉, 伊藤隆基
  • Organizer: 日本機械学会北陸信越支部第50期総会・講演会
  • Place of Presentation: 福井大学（福井県福井市）
• [Presentation] 周俊涛, 伊藤隆基
  • Author(s): F82H 鋼における非比例多軸低サイクル疲労寿命に及ぼす負荷経路およびひずみ速度の影響
  • Organizer: 日本機械学会北陸信越支部第50期総会・講演会
  • Place of Presentation: 福井大学（福井県福井市）
• [Presentation] 非比例多軸負荷におけるSS400 の低サイクル疲労強度評価
  • Author(s): 森下高弘, 伊藤隆基, 竹田憲生, 磯部展宏
  • Organizer: 日本機械学会北陸信越支部第50期総会・講演会
  • Place of Presentation: 福井大学（福井県福井市）