Elasto-plastic analysis of block structures through a homogenization method
Elasto-plastic analysis of block structures through a homogenization method
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DOI：
10.1002/nag.799
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发表时间：
2010-02-25
影响因子：
4
通讯作者：
Malena, M.
中科院分区：
文献类型：
--
作者：
de Felice, G.;Amorosi, A.;Malena, M.
本文描述了一种本构关系的发展和数值实现，用于模拟具有周期性织构的块体结构的弹塑性行为，在宏观尺度上将其视为均质各向异性介质。宏观模型显示保留了关节的力学特性和块体形状的记忆。由于块体结构的离散性和单元的几何排列，在屈服面上整体显示出各向异性和奇异性。该模型是在多面塑性框架下建立的。在有限元程序中采用了两种不同的算法——隐式返回映射方案和直接由哈尔-卡门原理导出的最小化算法来实现。通过分析和实验结果对模型进行了验证，均质连续体与原始砌块组合体的极限非弹性行为比较表明，当砌块尺寸较小时与整个组合体的极限非弹性行为比较一致。Copyright (C) 2009 John Wiley & Sons, Ltd
The paper describes the development and numerical implementation of a constitutive relationship for modeling the elasto-plastic behavior of block structures with periodic texture regarded at a macroscopic scale as homogenized anisotropic media. The macroscopic model is shown to retain memory of the mechanical characteristics of the joints and of the shape of the blocks. The overall display anisotropy and singularities in the yield surface arising from the discrete nature of the block structure and the geometrical arrangement of the units. The model is formulated in the framework of multi-surface plasticity. It is implemented in an finite element (FE) code by means of two different algorithms an implicit return mapping scheme and a minimization algorithm directly derived from the Haar-Karman principle. The model is validated against analytical and experimental results the comparison between the homogenized continuum and the original block assemble shows a good agreement in terms of ultimate inelastic behavior, when the size of the block is small as compared with that of the whole assembly Copyright (C) 2009 John Wiley & Sons, Ltd