An analysis of interlaminar and in plane shear failures for [±θ]s composite laminates loaded in uniaxial compression is described. A laminate model is presented that idealizes each ply as a plate supported by an elastic foundation. A nonlinear analysis for plies with short-wavelength initial imperfections is used to determine laminate stresses and in terlaminar strains. A failure criterion that uses the results of the nonlinear analysis is intro duced.
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