The high-strength steel (40CrMnsiMoVA) used in aviation industry was taken in this work. The residual stress field of the steel after shot peening was determined by x-ray stress instrument. Meanwhile, the finite element model of the shot peening was established, and the residual stress field of the steel after shot peening was numerically simulated by ANSYS software. Then, the simulated result was compared with the measured one to verify the validity of the model. Based on this model, the residual stress fields of the steel with different shot velocities and shot diameters were simulated. The results show that, with the increase in the shot velocity, maximum residual stress (σ_mrs), maximum residual stress depth (ξ₀) and strengthen depth (ξ_m) are increased gradually. When the shot velocity is 280 m/s, the σ_mrs reaches − 696 MPa, and the ξ₀ and ξ_m increase to 0.43 and 0.70 mm, respectively. With the increase in the shot diameter, the σ_mrs, ξ₀ and ξ_m are increased gradually. When the shot diameter is 1.5 mm, the σ_mrs, ξ₀ and ξ_m increase to − 800 MPa, 0.56 and 0.78 mm, respectively.

中文翻译：

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高强度钢喷丸后残余应力场的数值模拟

这项工作采用了航空工业中使用的高强度钢（40CrMnsiMoVA）。用X射线应力仪测定喷丸处理后钢的残余应力场。同时建立了喷丸强化的有限元模型，并通过ANSYS软件对喷丸强化后的残余应力场进行了数值模拟。然后，将模拟结果与实测结果进行比较，以验证模型的有效性。基于该模型，模拟了不同抛丸速度和抛丸直径的钢的残余应力场。结果表明，随着增加射击速度，最大残余应力（σ_夫人），最大残余应力深度（ξ ₀），并增强深度（ξ_m）逐渐增加。当拍摄速度为280米/秒，该σ_太太到达- 696兆帕，并且ξ ₀和ξ_米分别增加到0.43和0.70毫米。随着镜头直径的增加，σ_太太，ξ ₀和ξ_米逐渐增加。当镜头直径为1.5毫米，σ_太太，ξ ₀和ξ_米提高到- 800兆帕，0.56和0.78毫米。