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arXiv 1402.5186math.NAcs.NA
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基于扩展边界有限元方法与四叉树网格的应力分析自动化技术

Towards Automatic Stress Analysis using Scaled Boundary Finite Element Method with Quadtree Mesh of High-order Elements

The University of New South Wales(新南威尔士大学)

Hou Man, Chongmin Song, Sundararajan Natarajan, Ean Tat Ooi, Carolin Birk

AI总结:

本文提出利用扩展边界有限元方法与四叉树网格高阶元素进行应力和断裂分析,通过简单自动网格生成算法实现无需特殊处理的应力奇异分析,展示其在五个数值例子中的有效性。

摘要:

本文提出一种利用扩展边界有限元方法(SBFEM)与四叉树网格高阶元素进行应力和断裂分析的技术。四叉树网格的单元被建模为具有任意边数的扩展边界多边形,可具有任意高阶并准确表示裂纹尖端的应力奇异,而无需渐近富集或其他特殊技术。由于这些特性,设计了一种简单的自动网格生成算法。无需对悬挑节点进行特殊处理,且不存在位移不兼容问题。曲面边界和裂纹可通过无需过度局部细化的方式建模。五个数值例子展示了所提出技术的简便性和适用性。

英文摘要:

This paper presents a technique for stress and fracture analysis by using the scaled boundary finite element method (SBFEM) with quadtree mesh of high-order elements. The cells of the quadtree mesh are modelled as scaled boundary polygons that can have any number of edges, be of any high orders and represent the stress singularity around a crack tip accurately without asymptotic enrichment or other special techniques. Owing to these features, a simple and automatic meshing algorithm is devised. No special treatment is required for the hanging nodes and no displacement incompatibility occurs. Curved boundaries and cracks are modelled without excessive local refinement. Five numerical examples are presented to demonstrate the simplicity and applicability of the proposed technique.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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