Development of a model for simulating brittle crack propagation and arrest behavior and clarification of the long crack problem

• Project/Area Number: 15H05561
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Naval and maritime engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Shibanuma Kazuki 東京大学, 大学院工学系研究科(工学部), 准教授 (30611826)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000); Fiscal Year 2017: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2015: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
• Keywords: 脆性破壊 / 亀裂伝播 / アレスト / 長大亀裂問題 / 脆性亀裂伝播 / アレスト靭性 / 破壊のクライテリオン / アレスト設計 / 破壊力学 / 高速亀裂伝播 / 破壊応力 / 構造力学 / 船舶海洋工学

Outline of Final Research Achievements

In this study, we obtained four achievements as follows. (1) We developed a fracture mechanics model for simulating brittle crack propagation and arrest behavior in a steel plate based on the local fracture stress criterion and the crack closure effect by side ligaments. (2) Validation of the proposed model was performed by comparing with several experiments of several large-scale fracture tests. (3) We estimated the material property necessary for the arrest design of the actual structures by systematic calculations using the proposed model. (4) The validity of the local fracture stress criterion was validated using experiments and finite element analysis.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた成果は，40年以上未解決である長大亀裂問題を解明しただけでなく，構造基盤材料の「アレスト靱性」に本質的意味を与える挑戦的な試みであった．また，本研究の成果は，海上輸送構造物の安全性確保に直接的に貢献する基盤技術でもある．したがって本研究の成果は学術的・社会的価値を両立した工学研究であるといえる．

Research Products

• [Journal Article] Brittle crack propagation/arrest behavior in steel plate - Part III: Discussions on arrest design (2018)
  • Author(s): K. Shibanuma, F. Yanagimoto, K. Suzuki, S. Aihara
  • Journal Title: Engineering Fracture Mechanics Volume: 190 Pages: 104-119
  • DOI: 10.1016/j.engfracmech.2017.12.004
  • Peer Reviewed
• [Journal Article] Local stress in the vicinity of the propagating cleavage crack tip in ferritic steel (2018)
  • Author(s): F. Yanagimoto, K. Shibanuma, K. Suzuki, T. Matsumoto, S. Aihara
  • Journal Title: Materials & Design Volume: 144 Pages: 361-373
  • DOI: 10.1016/j.matdes.2018.02.037
  • Peer Reviewed
• [Journal Article] Brittle crack propagation/arrest behavior in steel plate - Part I: Model formulation (2016)
  • Author(s): Kazuki Shibanuma, Fuminori Yanagimoto,Tetsuya Namegawa, Katsuyuki Suzuki, Shuji Aihara
  • Journal Title: Engineering Fracture Mechanics Volume: 162 Pages: 324-340
  • DOI: 10.1016/j.engfracmech.2016.02.054
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Brittle crack propagation/arrest behavior in steel plate - Part II: Experiments and model validation (2016)
  • Author(s): Kazuki Shibanuma, Fuminori Yanagimoto,Tetsuya Namegawa, Katsuyuki Suzuki, Shuji Aihara
  • Journal Title: Engineering Fracture Mechanics Volume: 162 Pages: 341-360
  • DOI: 10.1016/j.engfracmech.2016.02.053
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] FUNDAMENTAL STUDY ON THE SIMULATION OF FAST CRACK PROPAGATION BY FINITE ELEMENT METHOD (2015)
  • Author(s): 柳本史教, 柴沼一樹, 鈴木克幸
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) Volume: 71 Issue: 2 Pages: I_29-I_38
  • DOI: 10.2208/jscejam.71.I_29
  • NAID: 130005128816
  • ISSN: 2185-4661
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] フェライト・パーライト鋼の劈開亀裂伝播における局所破壊応力の実験的評価 (2018)
  • Author(s): 柳本史教, 柴沼一樹, 鈴木克幸, 粟飯原周二
  • Organizer: 日本鉄鋼協会 春季講演大会
• [Presentation] Measurement of local fracture stress for cleavage crack propagation in steel (2017)
  • Author(s): F. Yanagimoto, K. Shibanuma, K. Suzuki, S. Aihara
  • Organizer: ICF14 (14th International Conference on Fracture)
  • Int'l Joint Research
• [Presentation] 有限要素法による高速伝播亀裂の局所応力評価 (2017)
  • Author(s): 柳本史教, 柴沼一樹, 白井結哉, 西岡陽, 鈴木克幸
  • Organizer: 日本船舶海洋工学会 秋季講演会
• [Presentation] A new model to simulate crack arrest behavior in steel plates used for naval structures (2016)
  • Author(s): Fuminori Yanagimoto, Kazuki Shibanuma, Katsuyuki Suzuki, Shuji Aihara
  • Organizer: Techno-Ocean 2016
  • Place of Presentation: Kobe
  • Year and Date: 2016-10-06
  • Int'l Joint Research / Invited
• [Presentation] Node release technic to evaluate local fracture stress in fast crack propagation (2016)
  • Author(s): Y. Nishioka*, K. Shibanuma, K. Suzuki
  • Organizer: The 21st European Conference on Fracture
  • Place of Presentation: Catania, Italy
  • Year and Date: 2016-06-20
  • Int'l Joint Research
• [Presentation] Modeling of brittle crack propagation/arrest behavior in steel plate (2016)
  • Author(s): K. Shibanuma*, F. Yanagimoto, T. Namegawa, K. Suzuki, S. Aihara
  • Organizer: The 21st European Conference on Fracture
  • Place of Presentation: Catania, Italy
  • Year and Date: 2016-06-20
  • Int'l Joint Research
• [Presentation] Measurement of local brittle fracture stress for dynamic crack propagation in steel (2016)
  • Author(s): F. Yanagimoto*, K. Shibanuma, T. Kawabata, K. Suzuki, S. Aihara
  • Organizer: The 21st European Conference on Fracture
  • Place of Presentation: Catania, Italy
  • Year and Date: 2016-06-20
  • Int'l Joint Research
• [Presentation] モデル計算による極厚鋼板における脆性亀裂伝播制御の評価に関する検討 (2015)
  • Author(s): 柳本史教*, 柴沼一樹, 鈴木克幸, 粟飯原周二
  • Organizer: 日本船舶海洋工学会 秋季講演会
  • Place of Presentation: 東京
  • Year and Date: 2015-11-16
• [Presentation] Estimation formula of required arrest toughness for heavy-section steel plates by parametric model calculation (2015)
  • Author(s): F. Yanagimoto*, K. Shibanuma, K. Suzuki, S. Aihara
  • Organizer: 日本船舶海洋工学会 秋季講演会
  • Place of Presentation: 東京
  • Year and Date: 2015-11-16
• [Presentation] 有限要素法による高速亀裂伝播の再現解析に関する基礎的検討 (2015)
  • Author(s): 柳本史教*, 柴沼一樹, 鈴木克幸
  • Organizer: 土木学会 第18回応用力学シンポジウム
  • Place of Presentation: 金沢
  • Year and Date: 2015-05-16
• [Remarks] Designing for crack arrest
  • URL: http://imechanica.org/node/20605