Numerical simulation of effects of laser shock parameters on residual stress field induced by laser shock processing

被引：0
|
作者：
Chen, Ruifang [1 ]
Guo, Naiguo [2 ]
Hua, Yinqun [2 ]
机构：
[1] School of Mechanical Engineering, Jiangsu University
[2] School of Material Science and Engineering, Jiangsu University
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2008年 / 35卷 / 06期
关键词：
ANSYS/LS-DYNA; Finite element; Laser shock processing; Laser technique; Residual stress;
D O I：
10.3788/CJL20083506.0931
中图分类号：
学科分类号：
摘要：
Numerical simulation is an effective way to predict the residual stress field induced by laser shock processing (LSP) and study the effects of laser shock parameters on the residual stress field . The finite element sorftware ANSYS/LS-DYNA was applied to simulate the three-dimensional (3D) residual stress field of 40Cr steel surface layer induced by LSP. The 3D finite element model of laser shock processing 40Cr steel was built. The numerical simulation of residual stress field of 40Cr steel surface layer induced by LSP was realized. The effects of laser shock parameters, intensity, pulse width and beam spot, on the residual stress field of 40Cr steel surface layer were studied by simulation. The result of numerical simulation indicates that the value of residual stress from simulation has a good consistent with that from measurment. There is an optimum laser power density for inducing a maximum surface residual compressive stress when the duration of laser pulse was fixed. The surface residual compressive stress decreases as the duration of laser pulse prolongs while the laser power density is fixed and the pulse duration is over 45 ns; The surface residual compressive stress also increases as the size of laser beam spot increases when laser power density and duration of laser pulse are fixed.
引用
收藏
页码：931 / 936
页数：5
相关论文
共 10 条
  • [1] Montross C.S., Wei T., Ye L., Et al., Laser shock processing and its effects on microstructure and properties of metal alloy: a review, International Journal of Fatigue, 24, 10, pp. 1021-1036, (2002)
  • [2] Rubio-Gonzdlez C., Ocana J.L., Gomez-Rosas G., Et al., Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061-T6 aluminum alloy, Material Science and Engineering A, 386, pp. 291-295, (2004)
  • [3] Hua Y., Chen R., Yang J., Et al., Study experiments and mechanism of 40Cr steel surface by laser compound processing, Chinese J. Lasers, 32, 10, pp. 1445-1448, (2005)
  • [4] Chen R., Hua Y., Cai L., Estimate of residual stress of steel materials induced by laser shock wave, Chinese J. Lasers, 33, 2, pp. 278-282, (2006)
  • [5] Peyre P., Fabbro R., Merrien P., Et al., Laser shock processing of aluminium alloys, application to high cycle fatigue behaviour, Materials Science and Engineering A, 210, 1, pp. 102-113, (1996)
  • [6] Duan Z., Study on laser shock wave and laser shock processing technology, pp. 20-22, (2002)
  • [7] Zhou N., Qiao D., Materials Dynamics under Pulses Beam Radiation, pp. 75-85, (2002)
  • [8] Yang G., Dynamic Theory of Plasticity, pp. 442-448, (2000)
  • [9] Ding K., Ye L., Three-dimensional dynamic finite element analysis of multiple laser shock processes, Surface Engineering, 19, 5, pp. 351-358, (2003)
  • [10] Hu Y., Yao Z., Hu J., Numerical simulation of residual stress field for laser shock processing, Chinese J. Lasers, 33, 6, pp. 846-851, (2006)
1