Finite Temperature Coupled Atomistic/Continuum Discrete Dislocation Dynamics Simulation of Nanoindentation
Simulations of nanoindentation in a hexagonal aluminum single crystal are performed using a finite temperature coupled atomistic/continuum discrete dislocation (CADD) method. The method captures, at the same time, the atomistic mechanisms and the long-range effects without the computational cost of full atomistic simulations. The effects of several process variables are investigated, including system temperature. We discuss the results and the deformation mechanisms that occur during a series of indentation simulations.
Key wordsMultiscale modeling discrete dislocations nanoindentation finite temperature
Unable to display preview. Download preview PDF.
- 4.Fang TH, Weng CI, Chang JG. “Molecular dynamics analysis of temperature effects on nanoindentation measurement”, Mater. Sci. Eng., A357, pp. 7–12, 2003.Google Scholar
- 5.Van der Giessen E, Needleman A. “Discrete dislocation plasticity: a simple planar model”, Simul. Mater. Sci. Eng., 3, pp. 688–691, 1995.Google Scholar
- 7.Kohlhoff S, Gumbsch P, Fischmeister HF. “Crack propagation in bcc crystals studied with a combined finite-element and atomistic model”, Philos. Mag. A, 64, pp. 851–878, 1991.Google Scholar
- 19.Dupuy L, Miller RE, Phillips R. “A finite temperature quasicontinuum”, Bulletin of APS March Meeting, Montreal, Quebec, Canada, March. 22–26, 2004, pp. 1420.Google Scholar