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An Assessment of Five Modeling Approaches for Thermo-Mechanical Stress Analysis of Laminated Composite PanelsA study is made of the effects of variation in the lamination and geometric parameters, and boundary conditions of multi-layered composite panels on the accuracy of the detailed response characteristics obtained by five different modeling approaches. The modeling approaches considered include four two-dimensional models, each with five parameters to characterize the deformation in the thickness direction, and a predictor-corrector approach with twelve displacement parameters. The two-dimensional models are first-order shear deformation theory, third-order theory; a theory based on trigonometric variation of the transverse shear stresses through the thickness, and a discrete layer theory. The combination of the following four key elements distinguishes the present study from previous studies reported in the literature: (1) the standard of comparison is taken to be the solutions obtained by using three-dimensional continuum models for each of the individual layers; (2) both mechanical and thermal loadings are considered; (3) boundary conditions other than simply supported edges are considered; and (4) quantities compared include detailed through-the-thickness distributions of transverse shear and transverse normal stresses. Based on the numerical studies conducted, the predictor-corrector approach appears to be the most effective technique for obtaining accurate transverse stresses, and for thermal loading, none of the two-dimensional models is adequate for calculating transverse normal stresses, even when used in conjunction with three-dimensional equilibrium equations.
Document ID
20010003447
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Noor, A. K.
(Virginia Univ. Hampton, VA United States)
Malik, M.
(Virginia Univ. Hampton, VA United States)
Date Acquired
August 20, 2013
Publication Date
February 1, 2000
Publication Information
Publication: Computational Mechanics
Publisher: Springer-Verlag
Volume: 25
ISSN: 0178-7675
Subject Category
Composite Materials
Funding Number(s)
CONTRACT_GRANT: NAG1-2016
CONTRACT_GRANT: F49620-96-I-0462
Distribution Limits
Public
Copyright
Other

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