Author(s)

S.P. Marques & G.J. Creus

Abstract

Nonlinear analysis of viscoelastic composites under mechanical and hygrothermal loads S.P. Marques, G.J. Creus CEM^COM/(7F^G^ f orfo A/egre, RS, Brazil ABSTRACT The paper studies the time-dependent response of laminated composites of polymeric matrix subject to mechanical and hygrothermal loads. The analysis is based on an incremental Lagrangean formulation which allows the treatment of finite displacements with small strains. The material is considered as linear viscoelastic and hygrothermal-rheologically simple. Computational details and numerical examples are presented. INTRODUCTION Fiber reinforced polymeric composites are increasingly used, particularly in the aerospace industry, due to their high mechanical performance, light weight and great flexibility in design. On the other hand, they show some mechanical characteristics that must be taken into account; among

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