Volume 73, Number 1, January 2006
|Page(s)||62 - 68|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||23 November 2005|
Impact dynamics and failure of brittle solid states by means of nonequilibrium molecular dynamics simulations
Fraunhofer Ernst-Mach-Institut für Kurzzeitdynamik - D-79194 Freiburg, Germany
2 Abteilung Theoretische Polymerphysik, Universität Freiburg D-79106 Freiburg, Germany
Corresponding author: Martin.Steinhauser@emi.fraunhofer.de
Accepted: 31 October 2005
We report on high-speed impact nonequilibrium molecular dynamics simulations (NEMD) of brittle cohesive materials. A two-dimensional mesoscopic network of particles with a failure threshold is used for capturing the main mesostructural features. We find a good agreement between the initiation and propagation of cracks in our model and the experimental findings in impact experiments with different brittle materials. The failure dynamics in the material as a function of impact speed is discussed for standard load experiments and compared with experimental results.
PACS: 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 46.50.+a – Fracture mechanics, fatigue and cracks / 81.70.Bt – Mechanical testing, impact tests, static and dynamic loads
© EDP Sciences, 2005
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