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Thermally induced twist in graphite-epoxy tubesThis paper discusses an analytical and experimental study to investigate the thermally induced twist in laminated angle-ply graphite-epoxy tubes. Attention is focused on balanced laminates which, contrary to intuition, exhibit twist when the temperature is changed. The twisting is due to the fact that a lamina with ( a + phi) orientation and a lamina with (a - phi) orientation must be at slightly different radial positions in the twist. The lamina with the greater radial position determines the sense of the twist. Classical lamination theory does not predict this phenomenon, and so as more sophisticated theory must be employed. This paper outlines such as theory, which is based on an generalized plane-deformation elasticity analysis, and presents experimental data to confirm the predictions of the theory. A brief description of the experimental apparatus and procedure used to measure twist is presented.
Document ID
19880049527
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hyer, M. W.
(Maryland, University College Park, United States)
Rousseau, C. Q.
(General Electric Co., Aircraft Engine Business Group, Cincinnati OH, United States)
Tompkins, S. S.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1988
Publication Information
Publication: ASME, Transactions, Journal of Engineering Materials and Technology
Volume: 110
ISSN: 0094-4289
Subject Category
Composite Materials
Accession Number
88A36754
Distribution Limits
Public
Copyright
Other

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