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The room-temperature shapes of four-layer unsymmetric cross-ply laminatesA geometrically nonlinear extension of classical lamination theory developed by Hyer (1981) for predicting the room-temperature shapes of unsymmetric laminates is reformulated using relaxed restrictions regarding the inplane strains. The inplane residual strains of unsymmetric laminates which have cooled from curing into a cylindrical room-temperature shape are examined numerically. Results show that the residual strains are compressive and practically independent of spatial location on the laminate. In addition, the room temperature shapes of the four-layer unsymmetric cross-ply laminates are predicted, and it is shown that the temperature shapes are a strong function of their size and their stacking arrangement. It is demonstrated that, depending on the parameters selected, the room-temperature shape of a four-layer cross-ply unsymmetric laminate can be a unique saddle shape, a unique cylindrical shape, or a cylindrical shape that can be snapped through to another cylindrical shape.
Document ID
19820061947
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hyer, M. W.
(Virginia Polytechnic Institute and State University Blacksburg, VA, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1982
Publication Information
Publication: Journal of Composite Materials
Volume: 16
Subject Category
Structural Mechanics
Accession Number
82A45482
Funding Number(s)
CONTRACT_GRANT: NCC1-15
CONTRACT_GRANT: AF-AFOSR-81-0195
Distribution Limits
Public
Copyright
Other

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