期刊
GRANULAR MATTER
卷 14, 期 1, 页码 51-61出版社
SPRINGER
DOI: 10.1007/s10035-011-0298-8
关键词
Granular element method; Contact forces; Discrete mechanics; Multiscale modeling
资金
- NSF [1060087]
- AFOSR [FA9550-11-1-0052]
- DOE [DE-FG02-08ER15980]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1060087] Funding Source: National Science Foundation
We present a new method capable of inferring, for the first time, inter-particle contact forces in irregularly-shaped natural granular materials (e.g., sands), using basic Newtonian mechanics and balance of linear momentum at the particle level. The method furnishes a relationship between inter-particle forces and corresponding average particle stresses, which can be inferred, for instance, from measurements of average particle strains emanating from advanced experimental techniques (e.g., 3D X-ray diffraction). Inter-particle forces are the missing link in understanding how forces are transmitted in complex granular structures and the key to developing physics-based constitutive models. We present two numerical examples to verify the method and showcase its promise.
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