ANISOTROPIC STRENGTH OF GRANULAR MATERIAL CONSIDERING FABRIC EVOLUTION

YANG LIU; DUO ZHANG; XIAOXIAO WANG; PENGQIANG YU; WEI HU

ANISOTROPIC STRENGTH OF GRANULAR MATERIAL CONSIDERING FABRIC EVOLUTION

Authors

YANG LIU DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY, BEIJING, 100083, CHINA HTTP://ORCID.ORG/0000-0002-0333-6621
DUO ZHANG WUHAN INSTITUTE OF COMPREHENSIVE TRANSPORTATION CO. LTD, WUHAN, CHINA HTTP://ORCID.ORG/0000-0002-6956-5494
XIAOXIAO WANG DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY, BEIJING, 100083, CHINA HTTP://ORCID.ORG/0000-0001-5173-6497
PENGQIANG YU DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY, BEIJING, 100083, CHINA HTTP://ORCID.ORG/0000-0002-0317-4749
WEI HU DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITY OF SCIENCE AND TECHNOLOGY, BEIJING, 100083, CHINA HTTP://ORCID.ORG/0000-0002-4759-7129

Abstract

THE EFFECT OF FABRIC ANISOTROPY ON STRENGTH HAS NOT BEEN CONSIDERED IN MOST STRENGTH CRITERIONS FOR GRANULAR MATERIAL. SOME CRITERIONS CAN DESCRIBE THE VARIATION OF MATERIAL STRENGTH WITH STRESS-INDUCED ANISOTROPY, BUT MICRO-MECHANISM AND PHYSICAL MEANINGS ARE UNDEFINED. SOME CRITERIONS CONSIDER THE EFFECT OF FABRIC ANISOTROPY, BUT THE EVOLUTION OF FABRIC IS IGNORED DURING LOADING BY ASSUMING A CONSTANT FABRIC TENSOR. BASED ON STRENGTH MECHANICAL CHARACTERISTICS OF GRANULAR MATERIAL, IN THIS PAPER, THE RELATIONSHIP BETWEEN MACRO STRESS AND MICRO CONTACT FORCE OF GRANULAR MATERIAL IS DERIVED BY MICROMECHANICS. THEN, THE CONCEPT OF TRUE STRESS TENSOR IS PROPOSED. AN ANISOTROPIC STRENGTH CRITERION OF GRANULAR MATERIAL CONSIDERING FABRIC EVOLUTION IS ESTABLISHED AND ITS APPLICABILITY IS VALIDATED BY COMPARING WITH TEST RESULTS FOR DIFFERENT GRANULAR MATERIALS. THE ANALYSIS RESULTS INDICATE THAT THE PROPOSED ANISOTROPIC CRITERION CAN BE UTILIZED TO DESCRIBE THE STRENGTH FEATURE OF ANISOTROPIC GRANULAR MATERIALS, WHICH GIVES A WAY FOR THE CAUSE ANALYSIS OF THE STRENGTH OF GRANULAR MATERIALS FROM THE PERSPECTIVE OF MICROSCOPIC MECHANISM.

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Published

2019-02-25

Issue

Vol. 16 No. 3 (2019)

Section

Articles

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