Elastically-homogeneous lattice models of damage in geomaterials
朝比奈 大輔*; 青柳 和平; Kim, K.*; Birkholzer, J.*; Birkholzer, J. T.*; Bolander, J. E.*
Asahina, Daisuke*; Aoyagi, Kazuhei; Kim, K.*; Birkholzer, J.*; Birkholzer, J. T.*; Bolander, J. E.*
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.
使用言語 : English
掲載資料名 : Computers and Geotechnics
: 81
ページ数 : p.195 - 206
発行年月 : 2017/01
出版社名 : Elsevier
特許データ :
論文URL :
キーワード : Discrete models; 3D irregular lattice; Poisson effect; Horonobe URL; Brittle damage pattern
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 : 産業技術総合研究所
登録番号 : AA20150571
抄録集掲載番号 : 45000119
論文投稿番号 : 18446
Accesses  (From Jun. 2, 2014)
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