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Kinematics of Shear Banding in 3D Plane Strain DEM

机译:3D平面应变DEM中的剪切带运动学

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Shear banding is generally viewed as a form of instability that occurs when the observed states of a system permit a bifurcation in the solution path to two (or more) solutions. The mechanics of shear bands have been studied extensively both experimentally and analytically, yet mostly in a qualitative manner and in two-dimensions. The evolution of the micro-deformation mechanism leading to the development of shear bands is still not well understood and has important implications in three-dimensional analysis. Presented herein is a promising method of modeling the micromechanics of the shear band phenomenon in plane strain using parallelized discrete element method (DEM). The preliminary results show the DEM's capability of responding correctly to different loading conditions giving an accurate depiction of the behavior of real soil. The preliminary results from the DEM simulations are presented and discussed.
机译:剪切带通常被视为一种不稳定形式,这种不稳定形式是在系统的观察状态允许溶液路径中分叉成两个(或多个)溶液时发生的。剪切带的力学已经在实验和分析上进行了广泛的研究,但大多是定性的,而且是二维的。导致剪切带发展的微形变机理的演变仍未得到很好的理解,并且在三维分析中具有重要意义。本文提出了一种使用并行化离散元方法(DEM)对平面应变中的剪切带现象的微力学进行建模的有前途的方法。初步结果表明DEM能够正确响应不同的加载条件,从而准确描述了真实土壤的行为。提出和讨论了来自DEM仿真的初步结果。

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