Simulation of shear bands with Soft PARticle Code (SPARC) and FE

Simulation of shear bands with Soft PARticle Code (SPARC) and FE
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使用 Soft PARticle Code (SPARC) 和 FE 模拟剪切带

DOI:
10.1007/s13137-016-0091-2
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发表时间:
2017
期刊:
GEM - International Journal on Geomathematics
影响因子:
--
通讯作者:
S.M.I. Bathaeian
S.M.I. Bathaeian
中科院分区:
--
文献类型:
--
作者:
B. Schneider-Muntau;C.-H. Chen;S.M.I. Bathaeian

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本文的目的是数值研究的发展,剪切带的厚度和方向,在双轴试验中解决连续介质力学问题的两种方法,即无网格的“软粒子”方法和基于网格的有限元方法。软PArticle码(SoftPArticle Code)是一种基于强公式的直接配置数值方法,它采用一阶多项式基计算偏微分方程的空间导数。本文采用一种新的非线性本构模型--压应力模型.双轴试验,其中包括均匀的,后来不均匀的局部变形模拟使用软PArticle代码和有限元方法。剪切带的倾角和厚度的评估和分析与早期的实验,理论和数值研究。此外,模拟结果进行了比较,并提出了证明的优势和局限性相比,有限元方法。
The aim of this paper is to numerically investigate the development, thickness and orientation of shear bands, in biaxial test with two approaches towards solving problems of continuum mechanics, namely the meshless “Soft PARticle” method and the mesh based Finite Element method. Soft PArticle Code (SPARC) is a straightforward collocation numerical method based on strong formulation, in which a first order polynomial basis is adopted for the evaluation of spatial derivatives in partial differential equations. A novel nonlinear constitutive model— barodesy for clay, is adopted in this study. The biaxial test, which involves homogeneous, and later inhomogeneous localized deformation is simulated using the Soft PArticle Code and the Finite Element method. The inclination and thickness of the shear bands are evaluated and analysed with the earlier experimental, theoretical and numerical investigations. Furthermore, simulation results are compared and presented to demonstrate the advantages and limitations of SPARC in comparison to FE method.
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