Communications on Applied Mathematics and Computation ›› 2025, Vol. 7 ›› Issue (2): 470-484.doi: 10.1007/s42967-023-00343-0

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A Locking-Free and Reduction-Free Conforming Finite Element Method for the Reissner-Mindlin Plate on Rectangular Meshes

Shangyou Zhang1, Zhimin Zhang2   

  1. 1 Department of Mathematical Sciences, University of Delaware, Newark, DE 19716, USA;
    2 Department of Mathematics, Wayne State University, Detroit, MI 48202, USA
  • Received:2023-05-25 Revised:2023-10-03 Accepted:2023-10-07 Online:2025-06-20 Published:2025-04-21

Abstract: A family of conforming finite elements are designed on rectangular grids for solving the Reissner-Mindlin plate equation. The rotation is approximated by C1 - Qk+1 in one direction and C0 - Qk in the other direction finite elements. The displacement is approximated by C1 - Qk+1,k+1. The method is locking-free without using any projection/reduction operator. Theoretical proof and numerical confirmation are presented.

Key words: Locking-free, Reissner-Mindlin equation, Finite element, Rectangular mesh

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