动应力强度因子响应特性的理论分析

Theoretical Analysis on the Response Curve's Characteristics of Dynamic Stress Intensity Factor

利用振动理论求解三点弯曲试样的动态响应 ,得到了一个计及冲击速度影响的动应力强度因子 KI(t)表达式。在此基础上 ,对动应力强度因子的响应曲线唯一性以及与冲击速度 v0 成线性关系等响应特性 。

The vibration theory is used to investigate the dynamic responses of three-point bending specimen under the impact loads, and the formula for dynamic stress intensity factor K I(t) is obtained, which takes account of the effect of impact velocity. Based on this model, the response curve's characteristics of dynamic stress intensity factor, such as the uniqueness, the linear relationship between the dynamic stress intensity factor K I(t) and impact velocity v 0 , and so on, are analyzed.[KH2D]