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A unit-cell approach to prediction of the microbuckling strength of composites with non-uniform fiber imperfections under combined axial compression and in-plane shear

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A new micromechanical model for predicting the failure locus of long fiber composites under combined axial compression and in-plane shear is proposed. The model is based on a periodic unit… Click to show full abstract

A new micromechanical model for predicting the failure locus of long fiber composites under combined axial compression and in-plane shear is proposed. The model is based on a periodic unit cell with centrally located imperfections. Predictions of the compressive behavior for various biaxial loading ratios are made. The role of distribution of fiber imperfections in predicting the biaxial strength was discussed. The failure locus calculated from the new model was found to be in good agreement with experimental data available in the literature and less conservative than that from the periodic model with uniform imperfections.

Keywords: axial compression; unit cell; plane shear; combined axial; compression plane; fiber imperfections

Journal Title: Journal of Theoretical and Applied Mechanics
Year Published: 2019

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