Multiscale traction-separation relations for fiber-reinforced composites

Abstract eng:
An effective traction—separation relation (cohesive law) for fiber—reinforced composites is developed with the aim of incorporating microscopic fracture mechanisms under various mode mixity loading conditions in a unified, simple expression that is useful for analysis and design purposes. The relation is based on an extensive parametric study carried out to correlate the constituents” fracture properties, their adhesion strength and microstructural characteristics to the macroscopic fracture properties. It is shown that this procedure provides a viable alternative to the fully—coupled multiscale framework.

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