The Behavior of Ductile Crack Initiation from a Notch and a Crack Under Mode I Loading

• TOHGO Keiichiro

• OKAMOTO Yoshihide

• OTSUKA AKio

抄録

The behavior of ductile crack initiation from a notch and a crack under mode I loading has been investigated on a structural steel, SM 41 A. Experiments and large deformation finite element analyses based on Gurson's yield function were carried out for three-point-bending specimens with a notch or a crack. In the notched specimens, void growth behavior around the notch tip is described by the void volume fraction obtained by the finite element analysis, and the ductile crack initiation can be predicted based on the concept of critical void volume fraction. In the finite element analysis of the cracked specimen, a large strain field - process zone- around the crack tip is characterized by the void volume fraction. From the comparison of experimental results with analytical results, it is suggested that, in order to predict the ductile crack initiation from a crack based on the concept of critical void volume fraction, the correlation between the size of large strain field and the spatial distribution of inclusions should be taken into consideration.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 31 (3), 588-597, 1988

  一般社団法人 日本機械学会

キーワード

• Fracture
• Ductile Fracture
• Crack Initiation
• Void Volume Fraction
• Gurson's Yield Function
• Finite Element Method
• Large Deformation Analysis

詳細情報

• CRID: 1390282680410096256
• NII論文ID: 110002348454
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.31.3_588
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/31/3/31_3_588/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可