Computation of transient hygroscopic stresses in unidirectional laminated composite plates with cyclic and asymmetrical environmental conditions

  • A. Tounsi
  • M. Bouazza
  • E. Adda-Bedia


External variations in temperature and moisture are of primary importance for the long term behaviour of structures made of polymer matrix composites, because they induce residual stresses within laminated composite plates. It was shown (Hahn et al., 1978; Benkeddad et al., 1995, 1996; Tounsi et al., 2000, 2002, 2004; Adda-Bedia et al., 2001; Tounsi and Adda-Bedia, 2003a, b) that the heterogeneity and the anisotropy of such plates, have an influence on the distribution of transient hygroscopic stresses through the thickness of composite plates. The aim of the present paper is to present a simplified approach for the calculation of transient hygroscopic stresses within unidirectional laminates in the case where these latter are exposed to the cyclic and unsymmetric environmental conditions. Several examples are presented to assess such stresses and to demonstrate the efficiency of the used method. These stresses have to be taken into consideration for the design of composite structures submitted to a moist environment.

Key words:

unidirectional laminated composite plates cyclic and unsymmetric environmental conditions transient hygroscopic stresses 


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Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Laboratoire des Matèriaux et HydrologieUniversité de Sidi Bel AbbesSidi Bel AbbesAlgérie

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