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RESEARCH PAPERS: Aerospace: Limitations of FEM in Analysis of Composite Structures

Mixed Finite Element Models for Laminated Composite Plates

[+] Author and Article Information
J. N. Reddy

Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

D. Sandidge

Structures Directorate, Research, Development and Engineering Center, U.S. Army Missile Command, Redstone Arsenal, Ala. 35898

J. Eng. Ind 109(1), 39-45 (Feb 01, 1987) (7 pages) doi:10.1115/1.3187092 History: Received April 01, 1986; Online July 30, 2009

Abstract

Mixed finite element models of the classical and shear deformation plate theories are described, and their relative advantages, disadvantages and limitations are discussed. Numerical results showing the accuracy of the mixed finite elements are presented. Two main advantages of mixed models are the relaxation of continuity requirements on the interpolation functions and the accurate determination of the stress resultants. The disadvantages of mixed formulations are the difficulty in establishing convergence, accuracy and stability of finite element approximations and the computational expense.

Copyright © 1987 by ASME
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