The residual stress field produced by shot peening on Al-7075-T651 prismatic samples carrying V-edge notches is evaluated through combined Discrete Element Modeling (DEM) and Finite Element Modeling (FEM) simulations. Special care is paid to faithfully model the interaction between peening nozzle, shots and notched target through DEM analyses and to understand the coverage level at the notch root. The simulated stream of shots with randomly distributed size, location and velocity is imported into an explicit dynamic FE model of a neighborhood of the notch tip. The resulting residual stress (RS) field is compared to the RS field computed using thermal fields in a FEM simulation, calibrated with experimental data collected through Micro-hole Drilling, Micro-slot Cutting and Micro-X-ray Diffraction techniques. The obtained results are in good agreement with experimentally reconstructed RS and suggests the hypothesis that the notch tip RS field is dictated only by impacts occurring in the very vicinity of the notch apex.

通过结合离散元建模 (DEM) 和有限元建模 (FEM) 模拟，对带有 V 形边缘缺口的 Al-7075-T651 棱柱样品进行喷丸处理产生的残余应力场进行评估。特别注意通过 DEM 分析忠实地模拟喷丸喷嘴、射击和缺口目标之间的相互作用，并了解缺口根部的覆盖水平。具有随机分布的大小、位置和速度的模拟射击流被导入到凹口尖端附近的显式动态有限元模型中。将产生的残余应力 (RS) 场与在 FEM 模拟中使用热场计算的 RS 场进行比较，并使用通过微孔钻孔、微槽切割和微 X 射线衍射技术收集的实验数据进行校准。