首页    期刊浏览 2025年12月18日 星期四
登录注册

文章基本信息

  • 标题:Exact geometry solid-shell element based on a sampling surfaces technique for 3D stress analysis of doubly-curved composite shells
  • 作者:G. M. Kulikov ; A. A. Mamontov ; S. V. Plotnikova
  • 期刊名称:Curved and Layered Structures
  • 电子版ISSN:2353-7396
  • 出版年度:2016
  • 卷号:3
  • 期号:1
  • DOI:10.1515/cls-2016-0001
  • 出版社:Walter de Gruyter GmbH
  • 摘要:

    A hybrid-mixed ANS four-node shell element by using the sampling surfaces (SaS) technique is developed. The SaS formulation is based on choosing inside the nth layer In not equally spaced SaS parallel to the middle surface of the shell in order to introduce the displacements of these surfaces as basic shell variables. Such choice of unknowns with the consequent use of Lagrange polynomials of degree In − 1 in the thickness direction for each layer permits the presentation of the layered shell formulation in a very compact form. The SaS are located inside each layer at Chebyshev polynomial nodes that allows one to minimize uniformly the error due to the Lagrange interpolation. To implement the efficient analytical integration throughout the element, the enhanced ANS method is employed. The proposed hybrid-mixed four-node shell element is based on the Hu-Washizu variational equation and exhibits a superior performance in the case of coarse meshes. It could be useful for the 3D stress analysis of thick and thin doubly-curved shells since the SaS formulation gives the possibility to obtain numerical solutions with a prescribed accuracy, which asymptotically approach the exact solutions of elasticity as the number of SaS tends to infinity.

  • 关键词:Sampling surfaces method ; Doubly-curved composite shell ; Hybrid-mixed four-node solid-shell element ; 3D stress analysis
Loading...
联系我们|关于我们|网站声明
国家哲学社会科学文献中心版权所有