結合力を埋め込んだ弾性損傷モデルの構築とそのき裂進展解析への適用

• 新宅 勇一

  東北大学大学院工学研究科

• 寺田 賢二郎

  東北大学災害科学国際研究所

書誌事項

タイトル別名

• Cohesive-force embedded damage model and its application to crack propagation analyses

抄録

A cohesive-force embedded damage model is proposed in this study to realize both crack nucleation and propagation. As in the existing smeared crack model and rotating crack model, the crack opening is introduced at each material point, but is treated as an internal variable to be determined implicitly. To work with the proposed damage model in crack propagation analyses, the Nested Tangent Secant Method (NTSM) is proposed as a proper alternative to the method with approximate tangent moduli. After verifying that the proposed model provides equivalent performance to the traditional cohesive zone models for cracking behavior under uniform tensile loading, we demonstrate its superiority over them in simulating crack nucleation and propagation in a plate with hole and in a beam-like structure subjected to bending. Here, the superiority of the NTSM over the Explicit Secant Method (ESM) is also discussed. Also, we studied the characteristics of the exiting cohesive zone models that do not have the crack opening as an internal variable and pointed out their limitation in history-dependent problems by taking the mixed-mode condition crack propagation analysis as an example.

収録刊行物

• 日本計算工学会論文集

  日本計算工学会論文集 2016 (0), 20160011-20160011, 2016

  一般社団法人 日本計算工学会

キーワード

• Cohesive Zone Model
• Damage Model
• Smeared Crack Model
• Rotating Crack Model
• Crack Propagation Analysis

詳細情報

• CRID: 1390282679449859968
• NII論文ID: 130005138931
• DOI: 10.11421/jsces.2016.20160011
• ISSN: 13478826
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可