パルスレーザ照射による残留応力形成メカニズムの検討(1) : FEMによる衝撃波伝播シミュレーション(S06-3 放射光応力評価の実用化,S06 放射光による応力測定と残留応力評価)

概要

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Laser peening is a surface treatment process to introduce a compressive residual stress on material utilizing the impulsive effect of underwater laser irradiation. In order to clarify the laser peening mechanism, the shock wave propagation in austenitic stainless steel (SUS304) and the dynamic response of the material were studied by time-dependent elasto-plastic analysis with a finite element program, using laser-induced plasma pressure as an external load. The results showed that the shock wave propagated with a speed nearly equal to the velocity of longitudinal wave in SUS304. A compressive residual stress was imparted in-surface direction after the shock wave. The difference between the results with 1D and 3D like analyses will be discussed.
社団法人日本機械学会の論文
2004-09-04