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On the numerical performance of three-dimensional thick shell elements using a hybrid/mixed formulationThree-dimensional thick shell elements with 8, 16, and 18 nodes are formulated by using the hybrid/mixed method. In bending applications, these elements are free from locking effect and give improved stress predictions. Finite element equations are derived from the Hellinger-Reissner variational principle in which both the displacement and stress fields are approximated by independent interpolation functions. For the assumption of stress parameters, three guidelines are followed: (1) suppression of kinematic deformation modes, (2) invariant element property, and (3) the constraint index exhibited by the element, when applied to constrained-media problems, must be greater than or equal to one. Numerical results are presented to show the element's behavior characteristics regarding sensitivity to locking, distortion effect (patch tests), mesh convergence and the accuracy of stress evaluation.
Document ID
19870038650
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Graf, W.
(Akron Univ. Akron, OH, United States)
Chang, T. Y.
(Akron Univ. Akron, OH, United States)
Saleeb, A. F.
(Akron, University OH, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1986
Publication Information
Publication: Finite Elements in Analysis and Design
Volume: 2
ISSN: 0168-874X
Subject Category
Structural Mechanics
Accession Number
87A25924
Funding Number(s)
CONTRACT_GRANT: NAG3-307
Distribution Limits
Public
Copyright
Other

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