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Analysis of edge impact stresses in composite platesThe in-plane edge impact of composite plates, with or without a protection strip, is investigated. A computational analysis based on the Fast Fourier Transform technique is presented. The particular application of the present method is in the understanding of the foreign object damage problem of composite fan blades. The method is completely general and may be applied to the study of other stress wave propagation problems in a half space. Results indicate that for the protective strip to be effective in reducing impact stresses in the composite the thickness must be equal or greater than the impact contact dimension. Large interface shear stresses at the strip - composite boundary can be induced under impact.
Document ID
19750009638
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Moon, F. C. (Princeton Univ. NJ, United States)
Kang, C. K. (Princeton Univ. NJ, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
NASA-CR-134720
AMS-1141
Accession Number
75N17710
Funding Number(s)
CONTRACT_GRANT: NGR-31-001-267
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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