Study for Equivalent Simulation of Prestress Peen Forming Based on the Laser Forming Method

doi:10.3901/JME.2025.20.143

Abstract

Abstract: Prestress shot peen forming is an essential method for forming large-size thin-walled structural parts. However, the complex elastic-plastic deformation involved in the forming process presents a challenge in calculating directly the deformation response under the specified peening parameters. The energy of the shot beam in the shot peen forming process is equivalently converted to that of the laser beam in the laser forming process, enabling the equivalent simulation of macroscopic deformation of the shot-peened workpiece using the laser-induced temperature field. It is proven that the essential factors affecting the laser forming process are the laser power, scanning speed, the width and thickness of the plate. When other parameters remain constant, the equivalent laser energy can be determined by the impact energy of the shot beam and the equivalence factor. The average error of the proposed model is 5.108 %, with a maximum error of less than 10 %, demonstrating a well agreement between the simulation and test results. An equivalent numerical model of prestressed shot peening has been developed on the basis of energy equivalence, which can be further used to guide the prediction of shot peening deformation and the design of process parameters.

Key words: shot peen forming, pre-stress, energy equivalence, thin plate bending

CLC Number:

V261

WANG Tong, XU Xiaojie, WANG Wanli, YANG Qian, ZHANG Ting, YANG Yi. Study for Equivalent Simulation of Prestress Peen Forming Based on the Laser Forming Method[J]. Journal of Mechanical Engineering, 2025, 61(20): 143-153.

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