Stress Distribution of CFEP Laminated Composites under Supercritical Conditions

Abstract EN

Enormous amounts of wastes have been produced due to extensive use of carbon fiber/epoxy resin (CF/EP) composites.

The fact that the supercritical fluid can be used to recycle these composites efficiently has attracted widespread concerns.

A three-dimensional model of CF/EP laminates considering the interfacial layers was established.

The internal stress distribution of laminates was simulated based on a heat transfer model; and the change of shear stress with supercritical temperature and pressure was investigated.

The results show that the shear stress concentration was located in the interfacial layers; the maximum shear stress can be expressed by a curve of convex parabola to the temperature; and the most serious damage occurred in interfacial layers when temperature approached the glass-transition temperature of resin.