4.4 Article

Macro-Micro Mechanical Behavior of Crushable Granular Materials under Generalized Stress Conditions

期刊

KSCE JOURNAL OF CIVIL ENGINEERING
卷 25, 期 5, 页码 1634-1644

出版社

KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
DOI: 10.1007/s12205-021-1035-4

关键词

Particle breakage; Discrete element method; Intermediate principal stress; Fabric anisotropy

资金

  1. National Natural Science Foundation of China [51808204, 11702304]
  2. CAS Pioneer Hundred Talents Program [2018-040]
  3. National Key R&D Program of China [2016YFC0502208]
  4. PhD research startup foundation of Hubei University of Technology [BSQD2019040]

向作者/读者索取更多资源

This study investigated the joint influence of particle crushing and intermediate principal stress coefficient on the macro and micro performances of granular assembles using 3D discrete element method. The results showed that particle breakage significantly affects the behaviors of granular soils and does not influence the unique relationship between the intermediate principal stress coefficient and the deviatoric fabric of strong contacts.
This paper investigated the joint influence of particle crushing and intermediate principal stress coefficient on the macro and micro performances of granular assembles by using 3D discrete element method. The soil particle was modeled by crushable agglomerate. Numerical true triaxial tests with crushable agglomerates were performed. The mechanical behaviors of specimens with unbreakable agglomerates were also tested in this study. The results demonstrated that grain breakage can significantly affect the behaviors of granular soils in both macro and micro scales. Moreover, the present paper also showed that particle breakage did not influence the unique relationship between the intermediate principal stress coefficient b and the deviatoric fabric of strong contacts. This can provide a good basis for developing micro-parameter-based constitutive model considering particle breakage for granular soils.

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