Finite Element Analysis of Thermal Residual Stresses near Fiber/Matrix Interface

摘要

Thermal residual stresses are important in composite materials, Herein, the finite element method is used to compute and analyze the residual stresses particularly near the fiber/epoxy interface, and these stresses need to be taken into account. An axisymmetric model has been used for stress computation and analysis; in this work two cases are considered using an epoxy matrix with respectively glass and carbon fibers with a different volume fiber. Numerical calculation results it is shown that the stresses are important. The interface is affected by thermal stresses particularly in the free edge. The normal and shear stresses value have an influence on the behavior of the composite material during service.