• CN:11-2187/TH
  • ISSN:0577-6686

›› 1995, Vol. 31 ›› Issue (5): 109-115.

• 论文 • 上一篇    下一篇

非均质焊接接头中J积分虚拟裂纹扩展计算方法研究

杨新岐;霍立兴;张玉凤   

  1. 天津大学
  • 发布日期:1995-09-01

INVESTIGATION ON VIRTUAL CRACK EXTENSION METHOD FOR J-INTEGRAL PARAMETER CALCULATIONS IN HETEROGENEOUS WELDED JOINT

Yang Xinqi;Huo Lixing;Zhang Yufeng   

  1. Tianjin University
  • Published:1995-09-01

摘要: 将虚拟裂纹扩展(VCE)算法推广应用于非均质焊接接头,建立了三维弹塑性状态下J积分参量的VCE算法有限元程序。基于平面数值分析,详细考察了该算法在非幸免质焊接接头中的适用性。此外,讨论了焊接接头中三维状态下J参量沿裂纹前缘的分布规律。

关键词: J积分, VCE算法, 非均质, 有限元

Abstract: The virtual crack extension (VCE) method proposed by Parks and Delorenzi was extended and applied to the heterogeneous welded joints, and the three-dimensional (3D) elastic-plastic finite element program for J-integral calculations by VCE method is established based on plane analyses, the applicability of this method in welded joints is thoroughly examined. Besides, the 3D distribution of J-integral along the crack front in welded joints is discussed.

Key words: Finite element, Heterogeneous, J-integral, VCE method