【摘要】 <正> 1.前言 权函数是由Bueckner首先提出来的,用它可以灵活方便地计算应力强度因子。后来Paris等用有限单元法计算了矩形裂纹体的权函数。1976年,王自强对权函数的力学意义作了分析研究,并得到了无限体中含中心裂纹,其线裂纹及圆弧裂纹的权函数。1981年,张晓堤计算了矩形裂纹板条在不同长度的边界裂纹情况下的权函数。1981年,更多还原

【Abstract】 High-order weighting functions can be used to determine the coefficients of every term of the Williams expansions for cracked bodies of linear elasticity. In this paper, by means of the finite element method we calculated the first to the fifth order weighting functions of symmetric-strip-specimens, computed the coefficients of the first five terms of the expansions under certain given loading conditions, and discussed how to deal with the body forces and the loadings on the crack surfaces.更多还原