Communications on Applied Mathematics and Computation ›› 2025, Vol. 7 ›› Issue (3): 1098-1121.doi: 10.1007/s42967-024-00453-3

Previous Articles     Next Articles

Two Classes of Mixed Finite Element Methods for the Reissner-Mindlin Plate Problem

Jun Hu1, Xueqin Yang2   

  1. 1 LMAM and School of Mathematical Sciences, Peking University, Beijing 100871, China;
    2 School of Mathematical Sciences, Peking University, Beijing 100871, China
  • Received:2023-12-06 Revised:2024-08-12 Accepted:2024-08-16 Online:2025-09-20 Published:2025-05-23

Abstract: In this paper, we propose mixed finite element methods for the Reissner-Mindlin Plate Problem by introducing the bending moment as an independent variable. We apply the finite element approximations of the stress field and the displacement field constructed for the elasticity problem by Hu (J Comp Math 33: 283–296, 2015), Hu and Zhang (arXiv:1406.7457, 2014) to solve the bending moment and the rotation for the Reissner-Mindlin Plate Problem. We propose two triples of finite element spaces to approximate the bending moment, the rotation, and the displacement. The feature of these methods is that they need neither reduction terms nor penalty terms. Then, we prove the well-posedness of the discrete problem and obtain the optimal estimates independent of the plate thickness. Finally, we present some numerical examples to demonstrate the theoretical results.

Key words: Reissner-Mindlin plate, Mixed finite element method, Linear elasticity

CLC Number: