An asymptotic characterisation of the moisture diffusion in polymer matrixcomposites with cyclic environmental conditions

This paper presents and illustrates a straightforward method to determinate the concentration of the humidity in non steady and transient states in th e core of the resin matrix composite panel exposed to cyclic temperature an d moisture environmental conditions during a long time. In order to complet e the previous studies, an analytical solution in transient state is propos ed. Several examples are presented to demonstrate the assessment and perfor mance in this method compared to the classical step-by-step integration. (C ) 2000 Elsevier Science Ltd. All rights reserved.