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Modelling of thick composites using a layerwise laminate theoryThe layerwise laminate theory of Reddy (1987) is used to develop a layerwise, two-dimensional, displacement-based, finite element model of laminated composite plates that assumes a piecewise continuous distribution of the tranverse strains through the laminate thickness. The resulting layerwise finite element model is capable of computing interlaminar stresses and other localized effects with the same level of accuracy as a conventional 3D finite element model. Although the total number of degrees of freedom are comparable in both models, the layerwise model maintains a 2D-type data structure that provides several advantages over a conventional 3D finite element model, e.g. simplified input data, ease of mesh alteration, and faster element stiffness matrix formulation. Two sample problems are provided to illustrate the accuracy of the present model in computing interlaminar stresses for laminates in bending and extension.
Document ID
19930045650
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Robbins, D. H., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Reddy, J. N.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, United States)
Date Acquired
August 16, 2013
Publication Date
February 28, 1993
Publication Information
Publication: International Journal for Numerical Methods in Engineering
Volume: 36
Issue: 4
ISSN: 0029-5981
Subject Category
Structural Mechanics
Accession Number
93A29647
Funding Number(s)
CONTRACT_GRANT: NAG1-1030
CONTRACT_GRANT: NSF INT-89-08307
Distribution Limits
Public
Copyright
Other

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