曲轴电磁感应淬火残余应力模拟及对圆角应力影响的分析

过渡圆角处应力集中现象是曲轴疲劳断裂的主要原因之一,利用局部表面强化工艺产生残余应力的方法可有效提高曲轴疲劳强度。针对上述问题,本文使用有限元方法模拟了曲轴感应加热、快速冷却、产生残余应力的整个淬火过程。通过对某曲轴单拐淬火前后圆角处的应力状态进行模拟,定量比较了残余应力对过渡圆角处应力的影响,为曲轴的抗疲劳设计提供参考。

The Stress Impact On Fillet For Electromagnetic Induction Hardened Crankshaft Residual Stress Simulation

The phenomenon of stress concentration for transition fillet is the main cause of crankshaft fatigue fracture,Using portion surface hardening process produce residual stress that can effectively solve the problem.In response to these problems,Based on FEM simulation to obtain the final quench of residual stress field.By simulated a single abduction of crankshaft is whether quenching fillet stress.By quantitative comparison with the stress impact of the residual on transition fillet stress,to provide a reference on the anti-fatigue design of the crankshaft.