A Finite Element Model for Moisture Ab-/Desorption in Polymeric Matrix Based on Composite Materials

The paper presents a finite element formulation of the problem of moisture ab-/desorption in composite materials structural elements (e.g. laminated structures), and in which the materials show deviations from classical Fickian behaviour, principally through the characteristics of the matrix. The phenomena are considered as time-dependent and - through the previous consideration - nonlinear. The finite element formulation is analysed, a time integration scheme described and the selection of the time-step for time integration discussed. Some experimental data are verified.