A micromechanical model of tension-softening and bridging toughening of short random fiber reinforced brittle matrix composites

A micromechanical model has been formulated for the post-cracking behavior of a brittle matrix composite reinforced with randomly distributed short fibers. This model incorporates the mechanics of pull-out of fibers which are inclined at an angle to the matrix crack plane and which undergo slip-weak...

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Published in:Journal of the mechanics and physics of solids 1991, Vol.39 (5), p.607-625
Main Authors: Li, Victor C., Wang, Youjiang, Backer, Stanley
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Language:English
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creator Li, Victor C.
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description A micromechanical model has been formulated for the post-cracking behavior of a brittle matrix composite reinforced with randomly distributed short fibers. This model incorporates the mechanics of pull-out of fibers which are inclined at an angle to the matrix crack plane and which undergo slip-weakening or slip-hardening during the pull-out process. In addition, the random location and orientation of fibers are accounted for. Comparisons of model predictions of post-cracking tension-softening behavior with experimental data appear to support the validity of the model. The model is used to examine the effects of fiber length, snubbing friction coefficient and interfacial bond behavior on composite post-cracking tensile properties. The scaling of the bridging fracture toughening with material parameters is discussed.
doi_str_mv 10.1016/0022-5096(91)90043-N
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title A micromechanical model of tension-softening and bridging toughening of short random fiber reinforced brittle matrix composites
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