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Extension of the hole-drilling method to birefringent compositesA complete stress analysis and reliable failure criteria are essential for important structural applications of composites in order to fully utilize their unique properties. The inhomogeneity, anisotropy and inelasticity of many composites make the use of experimental methods indispensable. Among the experimental techniques, transmission photoelasticity has been extended to birefringent composites in recent years. The extension is not straight-forward, in view of the complex nature of the photoelastic response of such model materials. This paper very briefly reviews the important developments in the subject and then describes the theoretical basis for a new method of determining the individual values of principal stresses in composite models. The method consists in drilling very small holes at points where the state of stress has to be determined. Experiments are then described which verify the theoretical predictions. The limitations of the method are pointed out and it is concluded that valuable information concerning the state of stress in a composite model can be obtained through the suggested method.
Document ID
19820057260
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Prabhakaran, R.
(Old Dominion University Norfolk, VA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Composite Materials
Accession Number
82A40795
Funding Number(s)
CONTRACT_GRANT: NCC1-26
CONTRACT_GRANT: NSF CME-80-12956
Distribution Limits
Public
Copyright
Other

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