【摘要】 目的分析TC4钛合金的湿喷丸强化过程。方法利用ABAQUS有限元软件中的CEL方法以及随机分布函数建立弹丸随机分布的湿喷丸冲击强化模型,研究喷丸覆盖率对残余应力场和表面粗糙度的影响规律,进行TC4钛合金板材的湿喷丸强化实验,对比验证模拟结果。结果表面粗糙度随着喷丸覆盖率的增加而变大;对于残余应力场,随着覆盖率从50%增加到100%,最大残余压应力值和其所处位置的深度均增加。当覆盖率增加至200%,最大残余压应力值不再增加。不同喷丸覆盖率下表面残余应力值基本相同。经对比验证,构建的有限元模型的仿真结果与湿喷丸实验规律相一致。结论湿喷丸模型能够较好地模拟湿喷丸强化后板材表层残余压应力场和表面粗糙度的变化规律。更多还原

【Abstract】 The paper aims to analyze wet peening process of TC4 alloy. The model of shot peening was established with the CEL method in ABAQUS software and shot random distribution established by the random distribution function. The influences of wet shot peening coverage on the surface roughness and residual stress in the modified layer were investigated. Meanwhile the wet peening experiments were carried out, and the experimental results were compared with the simulation results. The surface roughness increased with the increase of coverage; as the coverage increased from 50% to 100%, the maximum compressive residual stress and the depth of it increased; when the coverage increased to 200%, the maximum value didn’t increase anymore; the surface residual stress was approximately the same under different coverage. The simulation results were in good agreement with experimental results. The shot peening model can well simulate the variation tendency of the residual stress field and the surface roughness of the wet-peened plate.更多还原