ANALYSIS OF PARAMETERS IN GRANULAR SOLID HYDRODYNAMICS FOR TRIAXIAL COMPRESSION TESTS

• Published in: Acta mechanica solida Sinica Vol. 27; no. 1; pp. 15 - 27
• Main Authors: Song, Shixiong, Sun, Qicheng, Jin, Feng, Zhang, Chuhan
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.02.2014; Springer Singapore
• Subjects: Classical Mechanics; Compressing; Engineering; Fluid dynamics; Fluid flow; Granular materials; granular solid hydrodynamics; GSH; Hydrodynamics; Mathematical analysis; non-equilibrium state; Stress-strain relationships; Stresses; Surfaces and Interfaces; Theoretical and Applied Mechanics; Thin Films; triaxial compressions; 三轴压缩; 固体状; 塑性本构关系; 流体动力学; 物理意义; 试验参数; 颗粒状物料; triaxial compressions; granular materials; granular solid hydrodynamics; non-equilibrium state
• ISSN: 0894-9166; 1860-2134
• DOI: 10.1016/S0894-9166(14)60013-6

Granular materials are omnipresent in industries and in nature. For small strains, elastic-plastic and hypoplastic constitutive relations are widely used in engineering practice, but they are not a significant reflection of the underlying physics. Under a unified thermodynamics framework explaining the physics of materials, granular solid hydrodynamics （GSH） was an ex- tension towards describing granular materials, not only solid-like, but also fluid-like behaviors. In this paper, the fundamentals of GSH are briefly treated and then simplified to analyze quasi- static deformations in triaxial compressions. The calculated stress-strain relations and volumetric strain are compared with experimental results. The influences of the major parameters in GSH, especially their cross coupling influences, are analyzed and their physical meanings are further clarified. After parameters were calibrated, the calculated stress values in the characteristic stress state are found to be within 22% of tested values. Meanwhile, the energy dissipation during triaxial compression is analyzed. The above results support and partially quantify GSH.