Proposal of Failure Criterion Applicable to Finite Element Analysis Results for Wall-Thinned Pipes under Bending Load

• Material Type: 文書・図像類
• Title: Proposal of Failure Criterion Applicable to Finite Element Analysis Results for Wall-Thinned Pipes under Bending Load
• Author/Editor: MESHII, Toshiyuki; ITO, Yoshiaki
• Author Heading: MESHII, Toshiyuki; ITO, Yoshiaki
• Publication Date: 2011-12
• Publication Date (W3CDTF): 2011-12
• Periodical title: Nuclear Engineering and Design
• No. or year of volume/issue: 241 12
• Volume: 241
• Issue: 12
• Pages: 4913-1921
• Text Language Code: eng
• Subject Heading: limit moment; bending, wall-thinned pipes; finite element analysis; fracture mode; cracking; collapse; failure criterion
• Target Audience: 一般
• Note (General): In this work, a failure criterion applicable to large strain Finite Element Analysis (FEA) results was proposed in order to predict both the fracture mode (collapse or cracking) and the limit bending load of wall-thinned straight pipes. This work was motivated from the recent experimental results of Tsuji and Meshii (2011); that is, fracture mode is not always collapse, and the fracture mode affects the limit bending load. The key finding in comparing their test results and a detailed large strain FEA results was that the Mises stress distribution at the limit bending load of a flawed cylinder was similar to that of a flawless cylinder; specifically, in case of collapse, the Mises stress exceeded the true yield stress of a material for the whole “volume" of a cylinder with a nominal wall thickness. Based on this finding, a failure criterion applicable to large strain FEA results of wall-thinned straight pipes *Title Page 2 under a bending load that can predict both fracture mode and limit bending load was proposed and was named the Domain Collapse Criterion (DCC). DCC predicts the limit bending load as the lower value of either the Mc FEA, which is the load at which the Mises stress exceeds the true yield strength of a straight pipe for the whole “volume" with a nominal wall thickness (fracture mode: collapse), or the Mc FEAb, which is the load at which the Mises stress in a section of the flaw ligament exceeds the true tensile stress (fracture mode: cracking). The results showed that the DCC could predict the fracture mode appropriately and the experimental limit bending load fundamentally on the conservative side within a maximum 20% difference regardless of the fracture mode. Another advantage of the DCC is that it uses the true yield and true tensile strength as the critical strength of the material and not the ambiguous flow strength.
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ