硬脆材料延性域切削的断裂力学有限元分析

Analysis of Hard-Brittle Material Ductile-Regime Machining Using Fracture Mechanics FEM

在有限元分析的基础上 ,采用断裂力学中的 J积分判据 ,给出了判别硬脆材料微切削中的塑性 -破碎切削模式转变的准则 ,并对两种典型的硬脆材料 Zr O2 和 Al2 O3 进行了计算 .实验结果表明 。

Based on the finite element analysis (FEA) of microcutting of hard-brittle materials, this paper gave out the rule to judge the transformation from ductile to fracture cutting mode according to the J-integral criterion. Then it calculated two typical hard-brittle material ZrO2 and Al2O3. The experiment results prove the correctness of the theory.