Abstract
In this paper, it is demonstrated that the compressive response of unidirectionally reinforced composites may initiate in a micro-buckling mode and subsequently switch to a micro-kinked configuration. The foregoing possibility derives from a mechanics model that considers initial fiber misalignments, a non-linear shear response of the matrix, shear deformable fibers, and stochastic fiber spacings. The last-mentioned non-uniformity in fiber spacings plays a major role in the generation of fiber kinks.Various features of the compressive deformation and failure process are exhibited by computational examples.
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