Parameter optimization analysis of laser shock processing based on ANSYS/LS-DYNA. Issue 1 (6th December 2016)

• Record Type: Journal Article
• Authors: Liu, Guijie; Yang, Shengrui; Wang, Yuqian; Yu, Jinjiang; Zhang, Liandi; Yang, Shengrui
• Is Part Of: Emerging materials research. Volume 5:Issue 1(2016)
• Page Start: 1
• Page End: 25
• Publication Date: 2016-12-06
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1680/jemmr.15.00077
• Languages: English
• ISSNs: 2046-0147

Abstract

Abstract : Laser shock processing (LSP) treatment of Q345 steel, under various parameters (peak pressure, spot diameter, number of shocks, and laser pulse width) was simulated with ANSYS/LS-DYNA using variable-controlling approach for optimization. It can be concluded that the influence of LSP on surface roughness is proved to be quite weak according to the simulation results of surface morphology. The influence of different parameters on LSP was discussed based on the residual stress field distribution of the model. The optical effect can be achieved with a single LSP impact at the peak pressure of 3-4 GPa. By increasing the spot diameter, the residual stress field is improved mainly on the top surface, but feebly in depth. Given the hardening phenomenon of the target material, residual stress field tends to be saturated after three impacts. Thus, three LSP impacts is the most reasonable number, and the best effect can be achieved at a laser pulse of 30 ns.