摩擦、膨胀、密度和应力状态耦合的砂土塑性流动规律

M. Wojciechowski
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引用次数: 0

摘要

基于Drucker-Prager公式,结合材料内部的摩擦、膨胀、密度和应力状态,提出了平面应变条件下砂土的流动规律和破坏准则。所得到的弹塑性、非关联、剪切硬化材料模型在有限元框架下以数值方式实现,并给出了一个简单的压缩算例。由于Houlsby公式的经验性质,相信数值模拟的结果在砂土的变形和抗剪强度估算中更为真实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plastic flow rule for sands with friction, dilation, density and stress state coupling
Abstract In this paper we propose a flow rule and failure criterion for sands in plane strain conditions based on Drucker-Prager formulation and enhanced with empirical Houlsby formula, which couples friction, dilation, density and stress state in the material. The resulting elasto-plastic, non-associated, shear hardening material model is implemented as a numerical procedure in the frame of finite element method and a simple compression example is presented. Because of the empirical nature of Houlsby formula, it is believed that results of numerical simulations will be more realistic both in deformation and shear strength estimation of sands.
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