The effect of residual stress on the non-linear behaviour of composite laminates Part II. Layer, laminate non-linear models and the effect of residual stress on the model parameters

This paper reports an analysis of the effect of residual stress resulting f rom the manufacturing process on the non-linear behaviour of a laminate. To investigate non-linear behaviour, Part I of this study addressed the manuf actured specimen, assessment of residual stress within the laminate, and me chanical testing. This second part is devoted to the modelling of the non-l inear behaviour of the laminate. including damage and plastic behaviour. Th e set of layer parameters is identified for each laminate and compared to t he residual stresses. This comparison shows that damage and plastic failure criteria depend on residual stresses. (C) 2001 Elsevier Science Ltd. All r ights reserved.