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Higher-order theories for thermal stresses in layered plates

Rohwer, K. and Rolfes, R. and Sparr, H. (2001) Higher-order theories for thermal stresses in layered plates. International Journal of Solids and Structures, 38 (21), pp. 3673-3687.

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Abstract

First order shear deformation theory renders quite accurate in-plane stresses even for rather thick plates. By means of equilibrium conditions derivatives of the in-plane stresses can be integrated to determine transverse shear and normal stresses. The need to use in-plane derivatives requires at least cubic shape functions. Simplifying assumptions relieve these requirements leading to the extended 2D method. While under mechanical load this method yields excellent results poor transverse normal stresses have been obtained for plates under a sinusoidal temperature distribution. This paper traces back these deficiencies to lentil-like deformations of each separate layer. It is proved that third or fifth order displacement approximations through the plate thickness avoid these deficiencies.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2001,
Title:Higher-order theories for thermal stresses in layered plates
Authors:
AuthorsInstitution or Email of Authors
Rohwer, K.UNSPECIFIED
Rolfes, R.UNSPECIFIED
Sparr, H.UNSPECIFIED
Date:2001
Journal or Publication Title:International Journal of Solids and Structures
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:38
Page Range:pp. 3673-3687
Status:Published
Keywords:Laminated composites; Transverse stresses; Thermal loads; Lentil-like deformations
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Institut für Strukturmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 16:06

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