DEM SIMULATIONS FOR EVALUATING EFFECTS OF SAMPLE PREPARATION METHOD ON THE SHEAR BEHAVIOR OF GRANULAR MATERIALS

• 片桐 淳

  (独)産業技術総合研究所 メタンハイドレート研究センター 生産モデル開発チーム

• 松島 亘志

  筑波大学 システム情報系

• 山田 恭央

  筑波大学 システム情報系

Bibliographic Information

Other Title

• DEMによる試料作製方法が粒状体のせん断挙動に及ぼす影響の定量的評価

Abstract

 In order to evaluate the effects of sample preparation method on the shear behavior of granular assemblies, three types of specimens were prepared: FC-specimens compacted by controlling inter-particle friction angle, TC-specimens compacted by controlling compaction time, and CC-specimens compacted by cyclic simple shear loading, respectively. A series of simple shear simulations by DEM on these specimens showed that the relationship between the void ratio and friction angle obtained in simple shear computed for the peak strength was unique irrespectively of the sample preparation methods. However, the shear moduli in small strain range were different for FC-, TC- and CC-specimens. To identify the reason for this difference, the micro-mechanical information such as coordination number, distribution of inter-particle forces were quantitatively evaluated. As a result, the granular packing structures were found to be different between three types of specimens, which might affects the deformation behavior in small strain range.

Journal

• Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))

  Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 68 (1), 67-77, 2012

  Japan Society of Civil Engineers

Keywords

• DEM
• simple shear
• sample preparation method
• coordination number
• contact force distribution

Details

• CRID: 1390001205349719296
• NII Article ID: 130004961304
• DOI: 10.2208/jscejam.68.67
• ISSN: 21854661
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed