Elastically-homogeneous lattice models of damage in geomaterials
| Autor: | Daisuke Asahina, Kunhwi Kim, Jens Birkholzer, John E. Bolander, Kazuhei Aoyagi |
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| Rok vydání: | 2017 |
| Předmět: |
Particle model
3D irregular lattice 0211 other engineering and technologies Resources Engineering and Extractive Metallurgy Modulus Brittle damage pattern 02 engineering and technology Poisson distribution Geological & Geomatics Engineering Civil Engineering symbols.namesake Poisson effect 0203 mechanical engineering Lattice (order) 021101 geological & geomatics engineering Physical quantity Mathematics Horonobe URL Discrete methods business.industry Mechanics Structural engineering Geotechnical Engineering and Engineering Geology Finite element method Poisson's ratio Computer Science Applications 020303 mechanical engineering & transports Homogeneous symbols Interdisciplinary Engineering business |
| Zdroj: | Asahina, D; Aoyagi, K; Kim, K; Birkholzer, JT; & Bolander, JE. (2017). Elastically-homogeneous lattice models of damage in geomaterials. Computers and Geotechnics, 81, 195-206. doi: 10.1016/j.compgeo.2016.08.015. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/4bz0v5j4 |
| Popis: | © 2016 Elsevier Ltd This study involves the development of the auxiliary stress approach for producing elastically-homogeneous lattice models of damage in geomaterials. The lattice models are based on random, three-dimensional assemblages of rigid-body-spring elements. Unlike conventional lattice or particle models, the elastic constants of a material (e.g., Young's modulus and Poisson's ratio) are represented properly in both global and local senses, without any need for calibration. The proposed approach is demonstrated and validated through analyses of homogeneous and heterogeneous systems under uni- and tri-axial loading conditions. Comparisons are made with analytical solutions and finite element results. Thereafter, the model is used to simulate a series of standard laboratory tests: (a) split-cylinder tests, and (b) uniaxial compressive tests of sedimentary rocks at the Horonobe Underground Research Laboratory in Hokkaido, Japan. Model inputs are based on physical quantities measured in the experiments. The simulation results agree well with the experimental results in terms of pre-peak stress-strain/displacement responses, strength measurements, and failure patterns. |
| Databáze: | OpenAIRE |
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