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A comparison of discrete element and micromechanical methods for determining the effective elastic properties of geomaterials |
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| Institution: | 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;2. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720-1462, United States;3. Department of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China;4. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China |
| Abstract: | Data generated from scanning electron microscopy images of oil-shale geomaterials are used to generate configurations and to acquire parameters required for use in homogenization schemes for the determination of the effective elastic properties of the samples. Two alternative homogenization methods are employed: numerical simulation using the Discrete Element Method and the Polycrystalline Self-Consistent Method from micromechanics. The schemes give rise to predictions of the effective elastic properties that are in very good agreement. |
| Keywords: | Homogenization Discrete element method Micromechanics Geomaterials Polycrystalline self-consistent method Anisotropy Stiffness tensor Hill tensor Concentration tensor |
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