双向载荷对双共线裂纹干涉J积分的影响

J-Integral Influence of Biaxial Loads on Co-Linear Double Cracks Interference

利用二维弹塑性有限元 ,计算了双向载荷下双共线裂纹干涉不同路径J积分值并与单向载荷J积分值作了比较。结果表明 :材料进入塑性后横向载荷对J积分值的影响必须考虑 ,且材料进入塑性后J积分的路径无关性已很难保证。

Using two dimensional elastic plastic finite element program leads to estimate the J-integral different paths of co-linear double crack interference under biaxial loads and to compare with uniaxial loads. It is shown that the influence of landscape orientation load on J-integral must be taken into account and the path-independence of the J-integral is hard to ensure , when the material turns into plasticity.