双面激光喷丸强化ZK60镁合金的残余应力数值研究

周建忠; 杨小东; 黄舒; 胡玲玲; 黄娟; 戴亚春

doi:doi:10.3788/cjl20103707.1850

中国激光, 2010, 37 (7): 1850, 网络出版: 2010-07-13

双面激光喷丸强化ZK60镁合金的残余应力数值研究

Residual Stress Field of ZK60 Specimen with Central Hole Induced by Both-Side Laser Shot Peening

论文大纲

周建忠 ^*杨小东黄舒胡玲玲黄娟戴亚春

作者单位

江苏大学机械工程学院,江苏镇江 212013

激光技术双面激光喷丸有限元法残余应力镁合金 laser technique both-side laser shot peening finite element analysis residual stress magnesium alloy

摘要

以有限元分析软件ABAQUS为平台,利用用户子程序编制了单面和双面激光喷丸时冲击波压力的加载程序,建立了小孔试样双面激光喷丸过程诱导残余应力的有限元分析模型。分析了小孔对激光喷丸强化效果的影响,研究了单面和双面激光喷丸下ZK60镁合金小孔试样的三维残余应力场分布。结果表明,采用双面激光喷丸工艺时,在试样上下表面均产生有益的残余压应力分布,下表面残余压应力的幅值是单面激光喷丸时的2倍左右。将典型实验与模拟结果进行对比,其一致性较好。

Abstract

The finite element analysis (FEA) softeware ABAQUS is applied to establish the finite element model (FEM) for one-side and both-side laser shot peening (LSP) of specimen with a central hole. User subroutine VDLOAD is used to program the loading model of shock wave pressure for both-side LSP. The influence of the hole on the peening effect is investigated,and the three-dimensional (3D) residual stress distribution of ZK60 magnesium alloy after one-side and both-side LSP is analyzed. The beneficial residual stress distribution was obtained after both-side LSP,with a stress value as two times high as that after one-side LSP on the bottom surface. The experimental results are compared with numerical simulation results and good consistency is observed.

参考文献

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周建忠, 杨小东, 黄舒, 胡玲玲, 黄娟, 戴亚春. 双面激光喷丸强化ZK60镁合金的残余应力数值研究[J]. 中国激光, 2010, 37(7): 1850. Zhou Jianzhong, Yang Xiaodong, Huang Shu, Hu Lingling, Huang Juan, Dai Yachun. Residual Stress Field of ZK60 Specimen with Central Hole Induced by Both-Side Laser Shot Peening[J]. Chinese Journal of Lasers, 2010, 37(7): 1850.

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