Effect of compressive residual stress generated by plastic preload on fatigue initiation of 6061 Al-alloy

In this paper the effect of compressive residuals stresses generated by plastic preload on fatigue crack initiation and performed on 6061 Al-alloy finite plate with central hole was studied. Finite element analysis (FEA) was used to generate residual stress field. The effect of residual stress on the fatigue crack initiation was investigated for cyclic tension. Based on elasto-plastic analysis at notch, fatigue initiation lives were predicted using fatigue code. Results shown that the fatigue initiation lives were affected by the presence of compressive residual stress at notch and total residual field. Intuitionally, stress ratio effect in presence of residual stress was highlight. Copyright (C) 2016 The Authors. Published by Elsevier B.V.