Micro–macro analysis of granular material behavior along proportional strain paths

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• 作者：Fran?ois Nicot ; Luc Sibille ; Pierre-Yves Hicher
• 关键词：Granular materials ; Loading path ; Directional analysis ; Liquefaction ; Void ratio ; Kinematical approach
• 刊名：Continuum Mechanics and Thermodynamics
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：27
• 期：1-2
• 页码：173-193
• 全文大小：2,422 KB
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• 刊物类别：Engineering
• 刊物主题：Theoretical and Applied Mechanics
  Engineering Thermodynamics and Transport Phenomena
  Mechanics, Fluids and Thermodynamics
  Structural Materials
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0959

文摘

When granular materials are subjected to proportional strain loading paths, they manifest a variety of behaviors depending on the initial void ratio of the specimen as well as the imposed dilatancy/contractancy rate. In some cases, the stress components may vanish over the duration of the test, and the specimen may progressively liquefy. To investigate this behavior, the authors have developed a kinematic approach to be deployed in two parts. First, numerical simulations are performed by means of a discrete element method. Secondly, two micromechanical models have corroborated the DEM results. The performance of these models may explain a number of microstructural mechanisms responsible for the macroscopic constitutive behavior.