Asymptotic expansions of stress tensor for linearly elastic shell

作者：Shen Xiaoqin^*; Li Kaitai; Ming Yang

来源：Applied Mathematical Modelling, 2013, 37(16-17): 7964-7972.

DOI：10.1016/j.apm.2013.03.032

• Linearly elastic shell
• Asymptotic analysis
• Stress tensor

In this paper, the asymptotic expansions of stress tensor for linearly elastic shell have been proposed by new asymptotic analysis method, which is different from the classical asymptotic analysis. The new asymptotic analysis method has two distinguishing features: one is that the displacement is expanded with respect to the thickness variable of the middle surface not to the thickness; another is that the first order term and the second order term of the displacement variable can be algebraically expressed by the leading term. To decompose stress tensor totally into 2-D variable and thickness variable, we have three steps: operator splitting, variables separation and dimension splitting. In the end, a numerical experiment of special hemispherical shell by FEM (finite element method) is provided. We derive the distribution of displacements and stress fields in the middle surface.

• 出版日期2013-9-1
• 单位西安理工大学; 长安大学; 西安交通大学