带裂纹板在冲击载荷作用下动态应力强度因子的数值计算

 本文使用八节点等参元和六节点畸变等参元的有限元方法,计算了中心穿透裂纹板在冲击载荷作用下的动态应力强度因子,并与Chen和Aberson的计算结果作了比较,本文的结果具有较高的精度和较少的计算量。文中还给出了动载影响系数k₁（t）和静态应力强度因子的关系式。并考虑了材料特性和板的几何尺寸对于动态应力强度因子的影响。

NUMERICAL CALCULATIONS OF DYNAMIC STRESS /NTENSITY FACTOR(DSIF) OF CENTER-CRACKED PLATE UNDER IMPACT LOADING

In this paper, the DSIF of center-cracked plate under impact loading was calculated by using 8-node isoparametric elements and 6-node distorted isoparametric elements of FEM. The results were compared with those of Chen and Aberson etc. It has been found that the results of this paper have higher accuracy and less computational time. Meanwhile, a relationship between the dynamic effective coefficient k (t) and static SIF was given. Futhermore, the effect of the material properties and geometric size of the plate was considered. The conclusions of this paper are very useful for structural fracture design under impact loading.