A Micromechanics based model for the prediction of compression fatigue failure of fiber reinforced composites

摘要

An approach to predict fatigue life of fiber reinforced polymer matrix composites (FRPC) in compression using a micromechanics based model is presented. The micromechanics based approach utilizes constituent, fiber and matrix, material properties. An experimental procedure to obtain the matrix properties is described. The material model is implemented and the FEM simulations are able to predict the kink band failure see in unidirectional composites when subjected to fatigue loading. An envelope fatigue loading approach is utilized to model fatigue cycles. Using the combination of matrix fatigue degradation and fatigue loading method it is possible to (numerically) predict the S-N curve.