Eur. Phys. J. AP
Volume 23, Number 2, August 2003
|Page(s)||83 - 88|
|Section||Surfaces, Interfaces and Films|
|Published online||12 June 2003|
FEM simulation of residual stresses induced by laser Peening
Coopération Laser Franco-Allemande, Laboratoire pour l'Application des Lasers de
Puissance (CLFA-LALP), UPR 1578 CNRS, 94114 Arcueil, France
2 Laboratoire Mécanique et Microstructure des Matériaux (LM3), ESA CNRS 8006 – École Nationale Supérieure d'Arts et Métiers, 75013 Paris, France
Corresponding author: firstname.lastname@example.org
Accepted: 8 April 2003
Published online: 12 June 2003
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 (106 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.
PACS: 62.50.+p – High-pressure and shock wave effects in solids and liquids / 68.35.Gy – Mechanical properties; surface strains
© EDP Sciences, 2003
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