压口应力断料模型的有限元分析

Finite element analysis of stress blanking model with impressed notch

从裂纹技术的需要出发,对压口试件在三点弯曲模型下其尖端的应力状态进行了数值分析.首先利用有限元分析软件ANSYS的三维分析功能,对基于双悬臂三点弯曲模型的压口试件的应力变化情况进行了计算,然后探讨了驱动裂纹沿欲断面扩展的边界条件和控制参数,得到了比较真实的结果,为压口三点弯曲应力断料模型的应用提供了理论基础.

Proceeding from the requirement of crack technique, the numerical analysis to the stress state near the notch tip in a impressed-notch sample in three-point bending was conducted. The changes of stress near the notch in a impressed-notch sample with double cantilever support was first calculated with the 3D analysis function of FEM software ANSYS. And then the boundary conditions and control parameters, which compel the crack to propagate along the desired direction, was discussed and some actual results was obtained. The theoretical foundation of stress blanking model with impressed-notch in three points bending was provided.