冲击载荷作用下圆板的动应力集中

Dynamic Stress Concentration of Circular Plate under Impulse Loads

采用沿次特征线数值积分方法求解冲击载荷作用下弹性圆板的动应力集中问题。 表明了圆板内动应力集中的发生及其发生位置与冲击载荷的形式及其作用范围，圆板 的材料性质及形状的关系，并分析了动应力集中的原因，将计算结果与 Ｋｏｌｓｋｙ的有 关脆性圆板的冲击实验结果进行了比较。

In this paper, thc method of numerical indegration along bicharacteristics is used to solve the problem of the dynamic stress concentration in the elastic circular plate, when the impulse loads are applied to the face of the plate. Occurrence of the dynamic stress concentration and its positions are found to be dependent on the shape of the impulse loads and its range loading, nature of materials, and the shape of the circular plate. The cause of the dynamic stress concentration is investigated.The numerical results are compared with the related results of impact experiment of the brittle circular plate that were obtaind by Kolsky.