Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 265, Issue -, Pages 136-147Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2013.06.008
Keywords
DEM; Silica; Brittle; Crack; Indentation; Hertzian cone
Funding
- Conseil Regional d'Aquitaine
- Etude et Formation en Surfacage Optique (EFESO 2) project
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The mechanical behavior of materials is usually simulated by a continuous mechanics approach. However, non-continuous phenomena such as multi-fracturing cannot be accurately simulated using a continuous description. The discrete element method (DEM) naturally accounts for discontinuities and is therefore a good alternative to the continuum approach. This work uses a discrete element model based on interaction given by 3D beam model. This model has proved to correctly simulate the elastic properties at the macroscopic scale. The simulation of brittle cracks is now tackled. This goal is attained by computing a failure criterion based on an equivalent hydrostatic stress. This microscopic criterion is then calibrated to fit experimental values of the macroscopic failure stress. Then, the simulation results are compared to experimental results of indentation tests in which a spherical indenter is used to load a silica glass, which is considered to be a perfectly brittle elastic material. (C) 2013 Elsevier B.V. All rights reserved.
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