Abstract
This paper deals with the computation of the transient hygroscopic stresses in unidirectional laminated plates due to asymmetrical constant environmental conditions taking into account the change of mechanical characteristics induced by the variation of temperature and moisture. The developed method permits us to determine directly the values of such stresses without the calculation of the moisture concentration through laminated plates. It observed through this study that the variation of elasticity modulus due to the temperature causes a stress relaxation. Through this theoretical study presented here, we hope to contribute to the understanding of hygrothermal behaviour of composite laminated plates.
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