T型航空铝合金结构件淬火残余应力数值模拟分析

Numerical Simulation and Analysis on Residual Stress Prediction in a Quenched T-Section Aluminum Component

运用ABAQUS有限元软件建立了T型航空7050铝合金构件淬火残余应力模型,得到了构件在淬火过程中的冷却曲线和不同部位的残余应力分布规律。结果表明:T型构件无论是肋部位还是腹板部位在淬火过程中均呈现出表面压应力,芯部拉应力的整体分布规律。但由于零件的复杂性,肋部位的塑性应变相对集中,导致其无论是表面还是芯部,产生的淬火残余应力均大于腹板部位的残余应力,且在整个淬火过程中分布规律相对复杂。

The quenching process of 7050 alunlinum alloy aircraft forging has been simulated by FE soft ABAQUS. The cooling curves and distribution of quenching residual stress have investigated. The results show that both the rib and web parts have same distribution： compressive stress on the surface, tensile stress in the core of the T component. The dis- tributions of both external and internal, residual stress on the rib are very complex, and bigger than web parts.