FEM simulation of residual stresses induced by laser Peening
FEM simulation of residual stresses induced by laser Peening
复制标题
DOI：
10.1051/epjap:2003037
复制
发表时间：
2003-08
影响因子：
1
通讯作者：
P. Peyre;A. Sollier;I. Chaieb;L. Berthe;E. Bartnicki;C. Braham;R. Fabbro
中科院分区：
文献类型：
--
作者：
P. Peyre;A. Sollier;I. Chaieb;L. Berthe;E. Bartnicki;C. Braham;R. Fabbro
激光强化的好处已经在疲劳、磨损或应力腐蚀开裂等领域得到了多次证明。然而，尽管最近在残余应力计算方面做了一些工作，但很少有人考虑用有限元方法来预测激光诱导的力学效应。这主要是由于LP过程中涉及的高应变率（10 6 s -1），这需要精确测定动态特性，并且在没有保护涂层的LP情况下，也可能是热载荷和机械载荷的组合。在本文中，我们的目的是提出一个全局的方法来解决这个问题，从确定加载条件和动态屈服强度开始，最后用有限元方法计算12% Cr马氏体不锈钢和7075铝合金的残余应力场。
Benefits from laser Peening have been demonstrated several times in fields like fatigue, wear or stress corrosion cracking. However, in spite of recent work on the calculation of residual stresses, very few authors have considered a finite element method (FEM) approach to predict laser-induced mechanical effect. This comes mainly from the high strain rates involved during LP (10 6 s -1 ), that necessitate the precise determination of dynamic properties, and also from the possible combination of thermal and mechanical loadings in the case of LP without protective coatings. In this paper, we aim at presenting a global approach of the problem, starting from the determination of loading conditions and dynamic yield strengths, to finish with FEM calculation of residual stress fields induced on a 12% Cr martensitic stainless steel and a 7075 aluminium alloy.