Computational model for predicting nonlinear viscoelastic damage evolution in materials subjected to dynamic loading |
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| Authors: | Flavio V Souza Yong-Rak Kim George A Gazonas David H Allen |
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| Affiliation: | aDepartment of Engineering Mechanics, University of Nebraska-Lincoln, 114 Othmer Hall, Lincoln, NE 68588, USA;bDepartment of Civil Engineering, University of Nebraska-Lincoln, W351 Nebraska Hall, Lincoln, NE 68588, USA;cU.S. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, MD 21005, USA |
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| Abstract: | Many inelastic solids accumulate numerous cracks before failure due to impact loading, thus rendering any exact solution of the IBVP untenable. It is therefore useful to construct computational models that can accurately predict the evolution of damage during actual impact/dynamic events in order to develop design tools for assessing performance characteristics. This paper presents a computational model for predicting the evolution of cracking in structures subjected to dynamic loading. Fracture is modeled via a nonlinear viscoelastic cohesive zone model. Two example problems are shown: one for model validation through comparison with a one-dimensional analytical solution for dynamic viscoelastic debonding, and the other demonstrates the applicability of the approach to model dynamic fracture propagation in the double cantilever beam test with a viscoelastic cohesive zone. |
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| Keywords: | B Debonding B Fracture C Computational modelling C Cohesive zone model |
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