...
首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >A reconstructed local B formulation for isogeometric Kirchhoff-Love shells
【24h】

A reconstructed local B formulation for isogeometric Kirchhoff-Love shells

机译:等距Kirchhoff-Love壳的重建局部B公式

获取原文
获取原文并翻译 | 示例
           

摘要

An efficient assumed strain formulation for avoiding the membrane locking of non polar shells is developed in the context of B-spline interpolation. Assumed membrane strains are introduced locally in each element with a local L-2-projection, and then a spline reconstruction algorithm, developed by Thomas et al. (2015), is employed for reconstructing the membrane strain at the global patch level. In this way, a banded stiffness matrix is obtained that strongly reduces the computational cost with respect to the standard (B) over bar formulation for isogeometric analysis. The main advantages of the proposed method are: the reproduction of regular membrane strain fields, an accurate membrane locking-free solution and an high computational efficiency with respect to standard (B) over bar formulation. The method can be applied for any polynomial degree of the B-spline interpolation. The effectiveness of the proposed method is demonstrated analyzing some bending and membrane dominated problem, commonly employed as benchmark in the shell literature. (C) 2018 Elsevier B.V. All rights reserved.
机译:在B样条插值的背景下,开发了一种有效的假定应变公式,可避免非极性壳膜的锁定。假定膜应变是通过局部L-2-投影局部引入每个单元中,然后由Thomas等人开发的样条重构算法。 (2015年),被用来重建在全球补丁水平的膜应变。以这种方式,获得了带状刚度矩阵,该带状刚度矩阵相对于等几何分析的条形公式,大大降低了相对于标准(B)的计算成本。所提出的方法的主要优点是:再现规则的膜应变场,精确的无膜锁定解决方案以及相对于标准配方(B)的棒配方具有较高的计算效率。该方法可以应用于B样条插值的任何多项式。通过分析一些弯曲和膜支配问题,证明了该方法的有效性,该问题通常在壳文献中用作基准。 (C)2018 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号