Reliability Prediction for Fatigue Damage and Residual Life in Composites

摘要: The static and fatigue properties the failure mechanisms of unnotched notched CFR composite laminates with different lay-ups to optimize stacking sequence effect are experimentally investigated, it is seen that process composites damage under compression cycles loading appears two stages. results this study provide an insight into development in constitute a fundamental basis for residual strength model. Two new practical fatigue-driven models based on controlling stress strain four parameters derived evaluate easily expediently from small sample test data using formulae. A dual cumulative rule predict formation propagation presented according traditional phenomenological methodology modern continuum mechanics theory. Then three-dimensional constitutive equation anisotropic established. evolution σ − m N * surface energy release rate criterion.