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首页> 外文期刊>Journal of Mechanical Science and Technology >Locking-free robust finite element approximation of thin shell-like structures
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Locking-free robust finite element approximation of thin shell-like structures

机译:无锁稳健的有限元近似薄壳状结构

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摘要

In the structural analysis of thin elastic structures using standard FEMs within the poor approximation space, the numerical results may suffer from the quality deterioration called the locking phenomenon. This situation becomes more crucial for the structures with non-vanishing curvatures, such as arch- and shell-like bodies, owing to the additional membrane constraints. In addition, the choice of unsuitable shear correction factor (SCF), in dimen-sionally-reduced first-order analysis models, may become an additional source for the quality deterioration. In this context, we here propose a locking-free robust finite element approximation for the robust structural analysis of shell-like structures, by improving the degenerated 8-node shell element. In order to completely overcome the quality deterioration according to the thickness reduction, we combine the reduced integration (RI) and the modified shear correction factor.
机译:在使用标准有限元在近似空间内的标准有限元的薄弹性结构的结构分析中,数值结果可能遭受称为锁定现象的质量劣化。 由于额外的膜限制,这种情况对于具有非消失曲率的结构,例如拱形和壳状体的结构变得更为重要。 此外,在DIMEN-Sionally降低的一阶分析模型中,选择不合适的剪切校正因子(SCF)可能成为质量劣化的额外源。 在这种情况下,我们通过改进退化的8节点壳元件,提出了一种无锁定的鲁棒有限元近似,用于壳状结构的稳健结构分析。 为了完全克服根据厚度减少的质量劣化,我们结合了减少的集成(RI)和改进的剪切校正因子。

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