Finite element modelling of the residual stresses in the ceramic-elastomer composites

Ceramic-elastomer composites are obtained by the infiltration of porous ceramics by an elastomer prior to the curing reaction at elevated temperatures. Because the elastomer and the ceramic have different expansion coefficients thermal stresses are generated during cooling to ambient temperature. In addition the elastomer contracts as it transforms from a mixture of the substrates in the liquid state to the solid state polymer with a covalently bonded network structure. These two phenomena result in the develop-ment of residual stresses in the composite. Residual stresses are of significant concern because they can cause damage in the form of cracks in the ceramic and delamination between the ceramic and the elas-tomer. They can also have an effect on the mechanical properties of the composite. The aim was to model in 3D space the residual stresses in the composites with two different interpenetrating phases. The Finite Element Method (FEM) was used to calculate the stresses Key words: ceramic-elastomer composites; residual stresses; Finite Element Method; infiltration 1