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Debond propagation in composite reinforced metalsStrain energy release rates were used to correlate cyclic debonding between metal sheets and composite reinforcement. An expression for the strain energy release rate was derived and applied to fatigue test results for three material systems: graphite bonded to aluminum with both a room temperature and an elevated temperature curing adhesive, and S-glass bonded to aluminum with an elevated temperature curing adhesive. For each material system, several thicknesses were tested with a range of fatigue loads. Cyclic debonding was monitored using a photoelastic technique. A close correlation was found between the observed debond rates and the calculated strain energy release rates for each material system.
Document ID
19740013433
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roderick, G. L. (Army Air Mobility R and D Lab. Hampton, VA, United States)
Everett, R. A. (NASA Langley Research Center Hampton, VA, United States)
Crews, J. H., Jr. (NASA Langley Research Center)
Date Acquired
September 3, 2013
Publication Date
February 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
NASA-TM-X-71948
Meeting Information
Meeting: ASTM Symp. on Fatigue of Composite Mater.
Location: Bal Harbour, FL
Country: United States
Start Date: December 2, 1973
End Date: December 7, 1973
Accession Number
74N21546
Funding Number(s)
PROJECT: RTOP 501-22-02-01-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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