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首页> 外文会议>Asian Pacific conference for fracture and strength'99 (APCFS'99) >Two Parameter Approach for Elastic-Plastic Fracture under Mixed Mode Loading : Large Scale Yielding
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Two Parameter Approach for Elastic-Plastic Fracture under Mixed Mode Loading : Large Scale Yielding

机译：混合模式载荷下弹塑性断裂的两参数方法：大规模屈服

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摘要

The effects of mode mixity and T-stress upon stress distribution near a crack tip in smallrnscale yielding condition under in-plane loading are explored. Also the mode mixity effect forrnCTS(compact tension-shear) specimen in large scale yielding condition are explored. Thernresults of elastic-plastic finite element analyses with J2-flow theory are presented for a smallscale-rnyield model with modified boundary layer and the CTS model in plane strain condition.rnThe shear stress srq near the tip is not affected by T-stress while the normal stresses srr andrnsqq are significantly affected by the positive T-stress as well as the negative T-stress with thernincreasing mode mixity. Also the near-tip stress distribution of the CTS specimen under thernstate of large-scale-yield agree fairly well with that of the modified boundary layerrnformulation with a appropriate T-stress. The two parameters approach with J-integral and Tstressrnis expected to be a promising tool to describe the near-tip stress field under a mixedrnmode loading.
机译：探讨了面内载荷下模式混合和T应力对小屈服条件下裂纹尖端附近应力分布的影响。并探讨了在大规模屈服条件下rnCTS（紧拉剪切）试样的模式混合效应。提出了用J2流动理论进行弹塑性有限元分析的结果，提出了平面应变条件下具有改进边界层的小尺寸屈服模型和CTS模型。正T应力和负T应力会随着模态混合度的增加而显着影响正应力srr和rnsqq。而且，在大屈服状态下，CTS试样的近端应力分布与具有适当T应力的修正边界层公式的分布相当吻合。使用J积分和Tstressrnis的两个参数方法有望成为描述混合模式载荷下近尖端应力场的有前途的工具。

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  • 来源
  • 会议地点 Xian(CN);Xian(CN)
  • 作者

    Do-Hyung Kim; Ki-Ju Kang;

  • 作者单位

    Department of Mechanical Engineering, College of Engineering Chonnam NationalrnUniversity, 300 Yongbong dong, Kwangju, 500-757 KorearnTel. 82-062-530-1668, Fax. 82-062-530-1689;

    Department of Mechanical Engineering, College of Engineering Chonnam NationalrnUniversity, 300 Yongbong dong, Kwangju, 500-757 KorearnTel. 82-062-530-1668, Fax. 82-062-530-1689, E-mail kjkang@chonnam.chonnam.ac.kr;

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  • 正文语种 eng
  • 中图分类 机械制造用材料;
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