Variationally consistent isogeometric analysis of trimmed thin shells at finite deformations, based on the STEP exchange format
Variationally consistent isogeometric analysis of trimmed thin shells at finite deformations, based on the STEP exchange format
复制标题
基于 STEP 交换格式的有限变形下修剪薄壳的变分一致等几何分析
DOI：
10.1016/j.cma.2018.02.027
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发表时间：
2018-07-01
影响因子：
7.2
通讯作者：
Schillinger, Dominik
中科院分区：
文献类型：
--
作者：
Guo, Yujie;Heller, Jason;Schillinger, Dominik
基于裁剪CAD曲面的等几何壳分析方法经过一系列的创新，目前正发展成为一种精确、高效、成熟的分析设计方法。这项工作有助于这一新兴技术在以下方面。在分析方面，我们提出了一个强大的变分一致的Nitsch型制定薄壳在大变形，弱耦合约束在修剪曲线。在几何方面，我们提出了一套算法，使修剪壳分析与CAD数据结构的STEP交换格式的基础上的自动交互。我们整合这些方法在一个全面的框架等几何修剪壳分析。我们证明，我们的框架是能够无缝地执行大变形应力分析的行业规模的76补丁表面模型的道奇RAM引擎盖，同时提供可比的准确性方面的Simulia的商业软件包Abaqus。(C)2018爱思唯尔B.V.保留所有权利。
Following a series of recent innovations, isogeometric shell analysis based on trimmed CAD surfaces is currently being developed into an accurate, efficient and mature design-through-analysis methodology. This work contributes to this emerging technology with respect to the following aspects. On the analysis side, we present a robust variationally consistent Nitsche-type formulation for thin shells at large deformations that weakly enforces coupling constraints at trimming curves. On the geometry side, we present a set of algorithms that enable automatic interaction of trimmed shell analysis with CAD data structures based on the STEP exchange format. We integrate these methodologies in a comprehensive framework for isogeometric trimmed shell analysis. We demonstrate that our framework is able to seamlessly perform large-deformation stress analysis of an industry-scale 76-patch surface model of a Dodge RAM hood, while delivering comparable accuracy with respect to Simulia's commercial software package Abaqus. (C) 2018 Elsevier B.V. All rights reserved.