DEM study on the effect of particle breakage on the macro- and micro-behavior of rockfill sheared along different stress paths |
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| Institution: | 1. College of Civil Engineering and Transportation, Hohai University, Nanjing 210098, China;2. School of Civil Engineering, Nanjing Institute of Technology, Nanjing 211167, China;3. School of Civil & Environmental Engineering, Nanyang Technological University, Nanyang Avenue, 639798 Singapore, Singapore;1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;2. Guizhou Zhengye Engineering and Investment Incorporation Limited, Guiyang, Guizhou 550012, China;1. School of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China;2. School of Engineering and Information Technology, Federation University Australia, Churchill 3842, VIC, Australia;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. Faculty of Engineering, China University of Geosciences, Wuhan, China;2. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China |
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| Abstract: | The behavior of crushable rockfill sheared along different stress paths is studied using the discrete element method. Rockfill particles are modeled as breakable agglomerates, and reasonable consistency is found between the predicted and experimental results. The simulation highlights the influence of agglomerate breakage on both the macro- and micro-behavior of the assembly. The evolution of both the number and mode of agglomerate breakage during shearing is significantly influenced by the confining pressure, deviator stress ratio, and loading direction. The relationship between the deviator stress ratio on the macro-scale and the deviator fabric on the micro-scale along different stress paths is explored. |
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| Keywords: | Discrete element method Rockfill Stress path Particle breakage Anisotropy |
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