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Particle finite element analysis of the granular column collapse problem

机译：颗粒柱坍塌问题的颗粒有限元分析

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摘要

The problem of granular column collapse is investigated by means of an axisymmetric version of the particle finite element method (PFEM). The granular medium is represented by a simple rate-independent plasticity model and the frictional contact between the granular flow and its rigid basal surface is accounted for. In the version of the PFEM developed for this study, the governing equations of the boundary value problem are cast in terms of an optimization problem and solved using mathematical programming tools. The agreement between model and experiment is generally satisfactory, quantitatively as well as qualitatively. However, the friction angle of the granular material, as well as the exact interface conditions between the base and granular material, are shown to have a relatively significant influence on the results.
机译：通过轴对称形式的颗粒有限元方法（PFEM）研究了颗粒状柱塌陷的问题。粒状介质由简单的速率无关的可塑性模型表示，并考虑了粒状流与其刚性基面之间的摩擦接触。在为该研究开发的PFEM版本中，边界值问题的控制方程根据优化问题进行浇铸，并使用数学编程工具进行求解。模型和实验之间的一致性通常在数量和质量上都令人满意。但是，粒状材料的摩擦角以及基础材料和粒状材料之间的确切界面条件显示出对结果有相对重要的影响。

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