A Micro–macro Damage Mechanics-based Model for Fatigue Damage and Life Prediction of Fiber-reinforced Composite Laminates

Abstract A multidirectional damage model was proposed to predict fatigue evolution and final failure of composite laminates in this paper. characterization for established characterize the influence three main modes on damaged mechanical behavior at micro–macro level. The also based mechanics stiffness degradation by means model. Then, a relationship between residual strength introduced, from which could be obtained according predicted stiffness. When is calculated decrease maximum applied stress loading after several cycles, laminate assumed fail, accordingly life obtained. In order verify model, two cross-ply under loadings with different levels were compared experimental results. standard derivation average errors prediction results less than 0.1 8.26%, respectively, indicating effectiveness reliability