TC4喷丸强化仿真与试验

针对目前喷丸有限元仿真研究中弹丸规则排列、覆盖率无法精确计算的研究现状，基于ABAQUS二次开发建立了弹丸空间位置随机分布、弹丸数量由覆盖率决定的多弹丸喷丸有限元模型，实现了不同工况、不同喷丸覆盖率条件下所需弹丸个数的精确计算；在此基础上研究了不同喷丸参数对TC4钛合金材料表面残余应力与表面粗糙度的影响规律。进行了TC4喷丸试验，将得到的残余应力分布、表面粗糙度与仿真结果进行对比，验证了该有限元模型的合理性。研究成果对喷丸工艺参数的确定具有一定的指导意义。 

TC4 shot peening simulation and experiment

In view of the current research status on the finite element simulation study of shot peening, such as the projectiles' regular arrangement and the peening coverage cannot be calculated precisely, a finite element model with multiple randomly distributed shots whose number depends on the peening coverage was secondarily developed with ABAQUS, in which accurate number of required shots under different working conditions and different peening coverage is calculated. The influence of peening parameters on the surface residual stress and the surface roughness of TC4 titanium alloy material was studied. The TC4 shot peening experiment was carried out, residual stress distribution and surface roughness obtained by experiment were compared with those by simulation, and the results verified the reasonable prediction of residual stress distribution and surface roughness by the model, which has certain guiding significance for the determination of shot peening process parameters.