An isogeometric framework for the modeling of curvilinear anisotropic media
An isogeometric framework for the modeling of curvilinear anisotropic media
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用于曲线各向异性介质建模的等几何框架
DOI：
10.1016/j.compstruct.2021.113771
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发表时间：
2021
影响因子：
6.3
通讯作者：
M. Salviato
中科院分区：
文献类型：
--
作者：
Kenta Suzuki;Sean E. Phenisee;M. Salviato
多材料增材制造和自动化复合材料制造的出现，使具有复杂曲线各向异性的结构设计成为可能。为了利用新的设计空间，高效的计算方法是必不可少的。在这项研究中，我们探索了一种新的基于nurbs的曲线纤维复合材料等几何分析（IGA）框架，并将其与标准有限元分析（FEA）进行了比较。我们发现，由于精确的几何表示和元素之间丰富的连续性，基于nurbs的IGA在计算效率、运行时间和相同自由度的场变量估计质量方面优于经典有限元分析。为了进一步证明IGA框架的使用，我们进行了优化研究，旨在确定最小化应力集中和Tsai-Wu破坏指数的光纤路径。该模型表明，与单向复合材料相比，曲线各向异性可以有效地降低应力集中高达82%，而不会显著影响整体板刚度。
The advent of multi-material additive manufacturing and automated composite manufacturing has enabled the design of structures featuring complex curvilinear anisotropy. To take advantage of the new design space, efficient computational approaches are quintessential. In this study, we explored a new NURBS-based Isogeometric Analysis (IGA) framework for the simulation of curvilinear fiber composites and we compared it to standard Finite Element Analysis (FEA).We showed that, thanks to the exact geometric representation and the enriched continuity between elements, NURBS-based IGA outperforms classical FEA in terms of computational efficiency, run-time, and estimation quality of field variables for the same number of degrees-of-freedom. To further demonstrate the use of the IGA framework, we performed optimization studies aimed at identifying the fiber paths minimizing stress concentration and Tsai-Wu failure index. The model showed that curvilinear anisotropy can be effectively harnessed to reduce the stress concentration of up to 82% compared to unidirectional composites without affecting the overall plate stiffness significantly.
用于模拟电机的等几何分析和谐波定子转子耦合
影响因子：
7.2
作者：
Bontinck;Jacopo;Schöps;Sebastian;De Gersem;Herbert
通讯作者：
Herbert