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Thermodynamically consistent coupled viscoplastic damage model for perforation and penetration in metal matrix composite materials |
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| Authors: | George Z Voyiadjis Babur Deliktas Anthony N Palazotto |
| Affiliation: | aDepartment of Civil and Environmental Engineering, Louisiana State University, 3508B CEBA, Baton Rouge, LA 70803, USA;bDepartment of Civil Engineering, Mustafa Kemal University, Hatay, Antakya 31034, Turkey;cDepartment of Aeronautics and Astronautics, Air Force Institute of Technology, WPAFB, OH 45433-7765, USA |
| Abstract: | Accurate modeling and efficient analysis of the metal matrix composite materials failure mechanism during high velocity impact conditions is still the ultimate goal for many researchers. The objective is to develop a micromechanical constitutive model that can effectively simulate the high impact damage problem of the metal matrix composite materials. Therefore in this paper, a multiscale micromechanical constitutive model that couples the anisotropic damage mechanism with the viscoplastic deformation is presented here as a solution to this situation. This coupled viscoplastic damage model is formulated based on thermodynamic laws. Nonlinear continuum mechanics is used for this heterogeneous media that assesses a strong coupling between viscoplasticity and anisotropic damage. It includes the strong directional effect of the fiber on the evolution of the back stress and the development of the viscoplastic strain in the material behavior for high velocity impact damage related problems. |
| Keywords: | A Metal-matrix composites (MMCs) B Anisotropy B Impact behaviour C Damage mechanics Perforation and penetration |
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