A cyclic anisotropic-plasticity model for metal matrix composites |
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| Affiliation: | 1. Department of Industrial and Manufacturing Engineering, Pennsylvania State University, State College, PA 16802, USA;2. General Motors Global Research and Development Center, Warren, MI 48092, USA;1. Graduate Research on Earthquake and Active Tectonics, Faculty of Earth Science and Technology, Bandung Institute of Technology, Indonesia;2. Geospatial Information Agency, Indonesia;3. Geodesy and Geomatics Engineering, Faculty of Earth Science and Technology, Bandung Institute of Technology, Indonesia;1. College of Engineering, Electrical Engineering Department, University of Babylon, Iraq;2. Electrical Engineering Department, University of Technology, Iraq;3. Computer Center, University of Babylon, Iraq;1. Federal University of Alagoas, Maceio, Brazil;2. University of Viginia, Charlottesville, VA 22904-4742, USA |
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| Abstract: | Based on a six parameter general anisotropic yield surface proposed earlier by Voyiadjis and Thiagarajan (An Anisotropic Yield Surface Model for Directionally Reinforced Metal Matrix Composites, Int. J. Plasticity [1995]), a cyclic plasticity model to model the behavior of directionally reinforced metal matrix composite, has been proposed here. Apart from being able to model different initial yielding behavior along different stress directions, a number of features have been incorporated into the plasticity model. They include the usage of a proposed non-associative flow rule, kinematic hardening rule of Phillips type, a modified form of the bounding surface model for modelling the cyclic behavior, and the usage of a proposed form for evaluating the plastic modulus for anisotropic materials. Previous experimental data have been used for the evaluation of the yield surface parameters as well as those for the determination of the plastic modulus. The stress-strain results generated from the model have then been compared with those from the experiments. The behavior of the model under certain simulated cyclic loading situations has also been presented. |
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