Linearisation and homogenisation for viscoelastic materials

Constitutive equations for non-linear viscoelastic materials are cz;express ed first using a caused operator which relates a response function to any l oading history The corresponding tangent linear equations are then defined through the Frechet derivative of this operator This definition is used to propose a step-by-step treatment in view of the derivation of the overall b ehaviour of non-linear non-ageing viscoelastic heterogeneous materials. (C) Academie des sciences/Elsevier Paris.