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A creep model is established for a cross-ply laminate in which the transverse crack density is increasing. Viscoelasticity theory and shear lag analysis are employed for this creep model and the transverse crack density is expressed as a function of both time and stress, based on a probabilistic failure model. The creep compliance of the cross-ply laminate is determined from creep tests of [90°8] specimens. The creep strain and transverse crack density of [0/90°3]s cross-ply laminates are measured during the creep tests and predicted creep strains using the present model agree well with the experimental ones.
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Ogi et al. (1999) studied this question.
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