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Numerical simulation of strain-rate dependent transition of transverse tensile failure mode in fiber-reinforced composites
Affiliation:1. Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-0051, Japan;2. Department of Aerospace Engineering, Tohoku University, 6-6-01 Aoba-yama, Aoba-ku, Sendai, Miyagi 980-8579, Japan;3. Department of Mechanical Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan;1. Department of Aerospace Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan;2. Toray Composites (America), Inc., 19002 50th Avenue East, Tacoma, WA 98446, USA;1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, Belgium;2. Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106, USA;3. Materials Department, University of California, Santa Barbara, CA 93106, USA;4. School of Engineering, University of Aberdeen, King’s College, Aberdeen AB24 3UE, Scotland, UK;1. Center for Composite Materials (UD-CCM), University of Delaware, Newark, DE 19716, USA;2. Department of Materials Science & Engineering, University of Delaware, Newark, DE 19716, USA;3. Department of Civil & Environmental Engineering, University of Delaware, Newark, DE 19716, USA;4. Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA;1. Department of Aerospace Engineering, Tohoku University, 6-6-01, Aoba-yama, Aoba-ku, Sendai, Miyagi 980-8579, Japan;2. Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, 7-1, Kioicho, Chiyoda-ku, Tokyo 102-8554, Japan;1. Graduate School of Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan;2. Department of Material Science and Technology, Tokyo University of Science, Tokyo, Japan;3. Department of Mechanical Engineering, National University of Singapore, Singapore;4. Department of Mechanical Engineering, Aoyama Gakuin University, Tokyo, Japan
Abstract:This study numerically simulates strain-rate dependent transverse tensile failure of unidirectional composites. The authors’ previous study reported that the failure mode depends on the strain rate, with an interface-failure-dominant mode at a relatively high strain rate and a matrix-failure-dominant mode at relatively low strain rate. The present study aims to demonstrate this failure-mode transition by a periodic unit-cell simulation containing 20 fibers located randomly in the matrix. An elasto-viscoplastic constitutive equation that involves continuum damage mechanics regarding yielding and cavitation-induced brittle failure is used for the matrix. A cohesive zone model is employed for the fiber–matrix interface, considering mixed-mode interfacial failure. For the results, the relationship between failure modes and the strain rate is consistent with the authors’ previous studies.
Keywords:A  Polymer–matrix composites (PMCs)  B  Debonding  C  Damage mechanics  C  Finite element analysis (FEA)
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