Assumed stress finite element analysis of through-cracks in angle-ply laminates

T. Nishioka, S. N. Atluri

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13 Scopus citations


In the present paper a new assumed stress finite element method, based on a complementary energy method, is developed for the analysis of cracks in angle-ply laminates. In this procedure, the fully three-dimensional stress state (including transverse normal and shear stresses) is accounted for; the mixed-mode stress and strain singularities, whose intensities vary within each layer near the crack front, are built into the formulation a priori; the interlayer traction reciprocity conditions are satisfied a priori; and the individual cross-sectional rotations of each layer are allowed; thus resulting in a highly efficient and cost-effective computational scheme for practical application to fracture studies of laminates. Results obtained from the present procedure, for the case of an uncracked laminate under bending and for the case of a laminate with a through-thickness crack under far-field tension, their comparison with other available data, and pertinent discussion, are presented.

Original languageEnglish
Pages (from-to)1125-1132
Number of pages8
JournalAIAA Journal
Issue number9
StatePublished - Sep 1980


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