A dual interpolation boundary face method with Hermite-type approximation for elasticity problems

A dual interpolation boundary face method with Hermite-type approximation for elasticity problems
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弹性问题的Hermite型近似对偶插值边界面法

DOI:
10.1016/j.euromechsol.2020.104005
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发表时间:
2020-07
期刊:
European Journal of Mechanics - A: Solids
影响因子:
--
通讯作者:
Suliman
Suliman
中科院分区:
其他
文献类型:
--
作者:
Zhang Jianming;He Rui;Lin Weicheng;Yang Le;Chi Baotao;Ju Chuanming;Suliman

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本文提出了弹性力学问题的Hermite型逼近的对偶插值边界面法。考虑到位移和牵引力之间的物理关系,我们还首次提出了弹性力学问题的Hermite型近似。与标准的移动最小二乘(MLS)近似相比,Hermite型近似的形函数直接由笛卡尔坐标而不是参数坐标构造。该方法与原有的对偶插值边界面法(DiBFM)一样,具有较高的精度和效率。此外,在Hermite型近似的影响域可以覆盖多个边缘。因此,与原有的DiBFM相比,这种新的方案更适合于处理薄壁和小特征的结构。工程实例表明了该方法的准确性、有效性和实用性。
This paper proposed the dual interpolation boundary face method with Hermite-type approximation for elasticity problems. Considering the physical relationship between displacement and traction, we also firstly present the Hermite-type approximation for elasticity problems. Compared with the standard moving least-squares (MLS) approximation, shape functions in Hermite-type approximation are directly constructed with Cartesian coordinates rather than parameter coordinates. This new approach can attain high accuracy and efficiency, the same as original dual interpolation boundary face method (DiBFM). Furthermore, the influence domain in the Hermite-type approximation can cover multiple edges. Thus, compared with the original DiBFM, this new scheme is more suitable for handling structures with thin walls and small features. Numerical examples with engineering background have illustrated the accuracy, efficiency and practicality of the method.
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