Abstract This article reveals the formation mechanism of surface topography and the formation and coupling mechanism of residual stress field (RSF) after abrasive water jet sequential peening (AWJSP) that can sequential peening on the material surface at a certain distance interval, and proposes a mathematical model of surface dimple characteristic verified by simulation results. In addition, the influences of shot velocity v0, shot radius R and the distance between the center of adjacent shots DC on surface topography and RSF were also investigated. Results show the surface dimple forms resulting from the material plastic strain, and the residual stress (RS) is mainly induced by the unrecovered elastic strain resulting from the hindering of plastic strain. Decreasing v0, R or DC can decrease the surface roughness Rt, while increasing v0 and R is beneficial to induce a large and deep compressive RS layer. DC influences the whole distribution of compressive RS layer directly.

中文翻译：

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磨料水射流连续喷丸（AWJSP）后表面形貌和残余应力的数值研究

摘要 本文揭示了可在材料表面以一定距离间隔连续喷丸的磨料水射流连续喷丸（AWJSP）后表面形貌的形成机制和残余应力场（RSF）的形成与耦合机制，并提出了一种数学方法。由仿真结果验证的表面凹坑特性模型。此外，还研究了射击速度 v0、射击半径 R 和相邻射击中心之间的距离 DC 对表面形貌和 RSF 的影响。结果表明，材料塑性应变导致表面凹坑形式，残余应力（RS）主要由塑性应变受阻导致的未恢复弹性应变引起。降低 v0、R 或 DC 可以降低表面粗糙度 Rt，同时增加 v0 和 R 有利于诱导大而深的压缩 RS 层。DC直接影响压缩RS层的整体分布。