Implementation of the finite element method in the three-dimensional discontinuous deformation analysis (3D-DDA)
Implementation of the finite element method in the three-dimensional discontinuous deformation analysis (3D-DDA)
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DOI：
10.1002/nag.704
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发表时间：
2008-10-25
影响因子：
4
通讯作者：
Hatami, Kianoosh
中科院分区：
文献类型：
--
作者：
Grayeli, Roozbeh;Hatami, Kianoosh
针对目前三维非连续变形分析（3D-DDA）算法在实际应用中的精度问题，提出了一种基于四面体四节点单元的改进3D-DDA算法。在C++环境下开发了改进的3D-DDA方法的分析程序，并通过与几种可用于选定问题的解析解的比较来说明其精度。用改进的3D-DDA方法对这些问题的预测解与相应的分析结果都显示出令人满意的一致性。本文提出的结果表明，修改后的3D-DDA方法与不连续建模能力提供了一个有用的计算工具，以确定应力和变形的实际问题，涉及裂隙弹性介质具有合理的精度。版权所有（C）2008年约翰威利父子。公司
A modified three-dimensional discontinuous deformation analysis (3D-DDA) method is derived using four-noded tetrahedral elements to improve the accuracy of current 3D-DDA algorithm in practical applications. The analysis prograrn for the modified 3D-DDA method is developed in a C + + environment and its accuracy is illustrated through comparisons with several analytical Solutions that are available for selected problems. The predicted Solutions for these problems using the modified 3D-DDA approach all show satisfactory agreement with the corresponding analytical results. Results presented in this paper demonstrate that the modified 3D-DDA method with discontinuous modeling capabilities offers a useful computational tool to determine stresses and deformations in practical problems involving fissured elastic media with reasonable accuracy. Copyright (C) 2008 John Wiley & Sons. Ltd.