YG225游车大钩钩体裂纹在静荷载作用下的断裂性能分析

The Performance Analysis of Fractures on the Hook Body of YG225 Travelling Block under Static Loads

通过对含表面裂纹的YG225游车大钩的钩体在静荷载作用下的断裂性能进行有限元模拟分析，得到了钩体副钩分别承受较小和最大工作荷载情况下的表面裂纹的应力强度因子(SIF)分布，确定裂纹SIF最大值。将模拟的SIF值与试验测试得到的钩体材料本身断裂韧度值进行比较，判断大钩中的裂纹是否发生扩展，为大钩钩体的受载断裂评估提供分析数据。

The fracture behavior of hook body with surface cracks of YG225 travelling block was simulated and analyzed under static load by finite element method.The distribution of stress intensity factor(SIF)of surface cracks on the accessory hook under small and maximum working loads was obtained,and the maximum value of crack SIF was determined.The simulated SIF value was compared with the fracture toughness value of the hook body material itself obtained from the test for judging whether crack propagation occurs on the hook for the purpose of providing the analytical data for the evaluation of the loaded fractures of hook body.