Linear and non linear creep modeling of talc filled peek composite

Abstract

The creep compliance of a viscoelastic material is a crucial material parameter that controls the time dependent creep. Viscoelastic materials and their composites are being widely used in electronic and structural components where strain response of such a material is of great concern. Linear viscoelastic models such as the generalized kelvin Voigt model is widely used to model the linear creep behavior. Poly ether-ether ketone is a semi crystalline polymer and in this study a PEEK composite filled with talcum is being used which also consists of a semi crystalline polymer matrix. Such semi crystalline matrixes are known to bring forth nonlinear viscoelastic properties. In this study we model the linear creep behavior and the stress dependent nonlinearity of the above-mentioned composite.