Constitutive equations for elastoplastic composites with imperfect bonding |
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| Institution: | 1. History and Philosophy of Science, University of Sydney, Australia;2. ESA Topical Team Arts & Science/RMIT University, Australia;1. Department of Energy Engineering. Universidad de Sevilla. Escuela Técnica Superior de Ingenieros. Avenida de los Descubrimientos, s/n, 41092 Seville, Spain;2. Department of Applied Science and Technology. Politecnico di Torino. Corso Duca degli Abruzzi, 24, 10129 Turin, Italy;3. Department of Condensed Matter Physics. Universidad de Sevilla. Facultad de Física. Avenida Reina Mercedes, s/n, 41012 Seville, Spain;1. Fuel Cell Research Center, Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea;2. Research Institute of Industrial Science and Technology (RIST), Pohang 790-330, Republic of Korea;3. Functional Ceramics Group, Korea Institute of Materials Science (KIMS), Changwon 642-831, Republic of Korea |
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| Abstract: | Closed-form constitutive relations are given for the prediction of the overall response of unidirectional fiber-reinforced composites having constituents that are elastoplastic materials. In these equations the damage mode of imperfect bonding between the fiber and matrix phases is incorporated. The interface decohesion is represented by two parameters that completely determine the degree of adhession at the interfaces in thenormal and tangential directions. Perfect contact, perfectly lubricated contact, and complete debonding are obtained as special cases. In the elastic region, the average stress-strain relations are given in terms of the effective elastic moduli of the damaged composite, all of which are given by closed-form expressions. The derived constitutive equations can be readily implemented for the analysis of metal matrix composites. |
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