材料期刊网

基于有限元分析软件 ABAQUS 建立了2024铝合金随机多弹丸喷丸的三维有限元模型，首先模拟了不同弹丸数量下残余应力场的变化特征，然后分析了弹丸速度和直径对残余应力场的影响；最后进行了试验验证.结果表明：弹丸数量大于80颗后，残余应力基本不再变化；增加弹丸速度可显著提高残余压应力层的深度、各深度残余压应力值以及残余压应力的峰值，但对残余压应力峰值的深度影响不大；增大弹丸直径对0~0．1 mm 深度内的残余压应力值影响不大，对残余压应力层的深度、0．1 mm深度以下的残余压应力值、残余压应力峰值及残余压应力峰值的深度提高明显；有限元模拟结果与试验结果接近，说明模拟结果准确.

The 3D finite element model of 2024 aluminum alloy shot peening with a number of random proj ectiles was established using finite element analysis software ABAQUS.Firstly,the change characteristics of residual stress field under different number of proj ectiles were simulated;And then the influences of velocity and diameter of projectile on residual stress field were analyzed;At last,the simulation results were verified by experiment.The results show that the residual stress kept unchanged when the number of proj ectiles was more than 80.The depth of compressive residual stress layer,the value of compressive residual stress at every depths and the peark compressive residual stress increased remarkably with the increase of the velocity of proj ectile,but the depth of peak compressive residual stress changed little;With the increase of the diameter of proj ectile,the depth of compressive residual stress layer,compressive residual stress in depth below 0.1 mm,peak compressive resudual stress and its depth improved significantly,but compressive residual stress in the depth range of 0-0.1 mm changed little.The experimental results is closed to the simulated ones,this indicate that the simulation is correct.