材料力学参量对焊后超声冲击处理应力应变影响的有限元模拟

FE simulation of effect of material mechanical parameters on welding stress and strain treated by ultrasonic impact

为了探究材料力学性能对超声冲击处理焊后应力应变的影响,采用有限元分析软件ABAQUS建立了不同力学性能参数的超声冲击模型.分别讨论了弹性模量、泊松比以及静态屈服强度对超声冲击处理后材料应力应变的影响,旨在探讨超声冲击处理对不同力学性能材料的应力应变强化程度.结果表明,材料的弹性模量、泊松比以及静态屈服强度都会影响超声冲击处理的应力应变;且冲击处x方向应力随着材料的弹性模量、泊松比以及静态屈服强度的增加而增大;而等效塑性应变会随着弹性模量和静态屈服强度的增加而变小,随着泊松比的增加而增大;泊松比对等效塑性应变影响大于x方向应力的影响.

The finite element model of different material mechanics treated by ultrasonic impact was established based on finite element software ABAQUS to explore their influences on welding stress and strain. The effects of elastic modulus,poisson's ratio and the initial yield strength of material on stress and strain were discussed,respectively. The results show that elastic modulus,poisson ratio and initial yield strength of material can affect the stress and strain. With the increase of elastic modulus,compressive stress of x direction can increases,while the equivalent plastic strain decreases. With the increase of poisson ratio,stress of x direction and equivalent plastic strain will increase,but the effect of the poisson ratio on the equivalent plastic strain is greater than that on x direction stress. With the increase of the initial yield strength,stress of x direction will increase,and the equivalent plastic strain decreases significantly.