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ARTICLE
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
1
Bialystok University of Technology, Department of Mechanical Engineering, Białystok, Poland
Submission date: 2017-08-18
Acceptance date: 2018-09-20
Publication date: 2019-04-15
Journal of Theoretical and Applied Mechanics 2019;57(2):303-316
KEYWORDS
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 is discussed. The failure locus calculated from the new model
is 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.
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