Matrix cracking development in CFRP laminates induced by cyclic loadings: Experiments and analyses

摘要

This paper reviews the experimental results obtained in our laboratory during the last decade as well as a related two dimensional shear lag analysis. The studies essentially involve brittle matrix composites under various experimental conditions. The physical and geometrical parameters governing the initiation, multiplication, growth and saturation of matrix cracks under cyclic mechanical loading have been identified. The analysis, associated with an energy release rate criterion, is used to predict cracking development in each cross-ply laminate subjected to any fatigue loading. More recently, an experimental program has been achieved to characterize the damage development due to thermal cyclic loading. This investigation brought out the limitations of a purely mechanical approach for the prediction of matrix cracking due to cyclic thermal exposure.