Impact dynamics and failure of brittle solid states by means of nonequilibrium molecular dynamics simulationsM. O. Steinhauser1, K. Grass1, 2, K. Thoma1 and A. Blumen2
1 Fraunhofer Ernst-Mach-Institut für Kurzzeitdynamik - D-79194 Freiburg, Germany
2 Abteilung Theoretische Polymerphysik, Universität Freiburg D-79106 Freiburg, Germany
received 6 May 2005; accepted in final form 31 October 2005
published online 23 November 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.
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