平行有限元自适应密集网格下位移推算技术的KI评价

M. Hadi, A. Ariffin
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引用次数: 1

摘要

本文对几内亚等人(Guinea et al.[1])关于单元尺寸、单元形状和单元网格排列对位移外推法(DET)确定的I型应力强度因子I K数值的影响的研究进行了回顾和进一步推广。本文对三种不同的DET结构进行了测试,并生成了非常精细的自适应三角形有限元网格。由于得到的结构刚度方程矩阵较大,采用并行处理方法求解。处理过程遵循使用预共轭梯度解算器逐个单元的方法。此外,还对更多的试件进行了评价,以对其构型行为进行深入的研究。这些行为基本上证实了之前研究得出的结论;然而,一些不熟悉的观察导致不同的策略,以获得准确的KI。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
KI evaluation using displacement etrapolation technique under adaptive dense mesh with parallel finite element
The work of Guinea et al. [1] on the influence of element size, element shape, and element mesh arrangement on numerical values of mode I stress intensity factor, I K determined by the displacement extrapolation technique (DET) is revisited and extended to some further. In this paper the three different DET configurations are tested along with the generation of very fine adaptive triangular finite element mesh. Since the resulted structural stiffness equation matrix is considerably large, it is solved using parallel processing. The processing procedure follows element-by-element approach using a pre-conjugate gradient solver. In addition, the evaluation is performed to a few more specimens to acquire thorough study on the configurations behaviors. Basically, the behaviors confirm the conclusions obtained by the previous study; nevertheless some unfamiliarities are observed which lead to a different strategy of obtaining the accurate KI.
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