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Influence of the intermediate principal stress and principal stress direction on the mechanical behavior of cohesionless soils using the discrete element method
Institution:1. Department of Civil Engineering, Oujiang College, Wenzhou University, Zhejiang, China;2. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Reclamation, Wenzhou University, Zhejiang, China;3. College of Architecture and Civil Engineering, Wenzhou University, Zhejiang, China;4. Department of Civil and Environmental Engineering, Colorado School of Mines, CO 80401, USA;1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China;2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Xiaohongshan, Wuhan, Hubei 430071, China;1. Center for Balance Architecture, Zhejiang Univ., Hangzhou 310058, China;2. Engineering Research Center of Urban Underground Space Development of Zhejiang Province, China;3. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China;4. Computing Center for Geotechnical Engineering (COMEGE), Zhejiang University, Hangzhou 310058, China;1. School of Civil Engineering and Architecture, GuangXi University, Nanning, 530004, China;2. Department of Civil Engineering, Tsinghua University, Beijing, 100084, China;1. Department of Civil Engineering, The Catholic University of America, Washington, DC 20064, USA;2. Schnabel Services, Inc., Glen Allen, VA 23059, USA;3. Department of the Navy, Naval Sea Systems Command 05C, Washington Navy Yard, Washington, DC 20376, USA
Abstract:In this paper, the Discrete Element Method (DEM) is employed to numerically explore the response of hollow cylinder specimens of granular soils under complex stress paths. Two series of numerical tests are conducted to clarify the effects of the principal stress direction α and the intermediate principal stress through the b-value on the mechanical response of granular materials. The effects of α and b-value on the non-coaxiality of the principal stress and the principal plastic strain increment directions are investigated. It is observed that b-value and α significantly affect the non-coaxial behavior of granular materials. Finally, the results are discussed and compared with those obtained from physical laboratory tests.
Keywords:Anisotropy  b-value  Non-coaxial behavior  Principal stress rotation  Hollow cylinder test  Strain localization
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