Three-dimensional bridging scale analysis of dynamic fracture.
- Northwestern University, Evanston, IL
- Sandia National Laboratories, Livermore, CA
This paper presents a three-dimensional generalization of the bridging scale concurrent method, a finite temperature multiple scale method that couples molecular dynamics (MD) to finite elements (FE). The generalizations include the numerical calculation of the boundary condition acting upon the reduced MD region, as such boundary conditions are analytically intractable for realistic three-dimensional crystal structures. The formulation retains key advantages emphasized in previous papers, particularly the compact size of the resulting time history kernel matrix. The coupled FE and reduced MD equations of motion are used to analyze dynamic fracture in a three-dimensional FCC lattice, where interesting physical phenomena such as crack branching are seen. The multiple scale results are further compared to benchmark MD simulations for verification purposes.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 952131
- Report Number(s):
- SAND2004-6557J
- Journal Information:
- Proposed for publication in Journal of Computational Physics., Journal Name: Proposed for publication in Journal of Computational Physics.
- Country of Publication:
- United States
- Language:
- English
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