Simulation of Interfacial Sliding Problem of Fiber Reinforced Composites Using Constraint Conditional Finite Element Method

摘要

The toughness of the fiber reinforced composite are improved by various mechanisms such as fiber bridging, fiber breakage, pullout, interfacial debonding, sliding and crack deflection etc. This interfacial sliding behavior has been treated as a contact problem, and analyzes using a penalty method etc. have been done conventionally, but this method requires repetitive calculation. Therefore, in this study, the interfacial sliding simulations were performed by using constraint condition-al finite element method (CC-FEM) which Coulomb's law of friction is taken into account and doesn't require repetitive calculation. As a results, in CC-FEM, the stresses of the fiber and matrix along axial, radius and circumferential direction show nonlinear distributions in the interfacial sliding region, and these distributions agreed well with general purpose analysis and theoretical model. Furthermore, the simulation of the single fiber push-out test were performed, and it is shown that the load-displacement curves are changed with interfacial shear strength and frictional coefficient.