Benchmark analysis of ductile fracture simulation for circumferentially cracked pipes subjected to bending

Naoki Miura, Tomohisa Kumagai, Masanori Kikuchi, Akiyuki Takahashi, Yun Jae Kim, Toshio Nagashima, Yoshitaka Wada

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In this study, some benchmark problems on fracture tests for circumferentially through-wall/surface cracked pipes were provided. The participants predicted the ductile crack propagation behavior by their own approaches, including nucleation, growth, and coalescence of voids simulated by Gurson model, ductile crack propagation using stress modified fracture strain (SMFS) model, J-integral based ductile crack propagation using XFEM, CTOA based ductile crack propagation using FEM, stress triaxiality and plastic strain (STPS) based ductile crack propagation using FEM, and ductile crack propagation using peridynamics. Among them, GTN, CTOA and STPS models were not applied to surface crack problems. Discrepancies between the experimental maximum loads and calculated maximum loads were within 10% in most cases and 25% in the maximum case. Element size dependency of analysis parameters were considered in SMFS and GTN models while those were determined from independent material tests. Gurson model can predict slanting crack propagation directions. XFEM which did not need analysis fitting parameters cannot analyze beyond the peaks of load-LPD curves. Crack propagation directions were given and fixed in both CTOA and STPS models. Parameters in Gurson model and peridynamics were optimized to reproduce load-LPD curve in one of the benchmark problems.

本文言語English
ホスト出版物のタイトルMaterials and Fabrication
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791857991
DOI
出版ステータスPublished - 2017
外部発表はい
イベントASME 2017 Pressure Vessels and Piping Conference, PVP 2017 - Waikoloa, United States
継続期間: 2017 7 162017 7 20

出版物シリーズ

名前American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
6A-2017
ISSN(印刷版)0277-027X

Conference

ConferenceASME 2017 Pressure Vessels and Piping Conference, PVP 2017
国/地域United States
CityWaikoloa
Period17/7/1617/7/20

ASJC Scopus subject areas

  • 機械工学

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