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matrix resin effects in composite delamination - mode i fracture aspectsA number of thermoset, toughened thermoset, and thermoplastic resin matrix systems were characterized for Mode I critical strain energy release rates, and their composites were tested for interlaminar critical strain energy release rates using the double cantilever beam method. A clear correlation is found between the two sets of data. With brittle resins, the interlaminar critical strain energy release rates are somewhat larger than the neat resin values due to a full transfer of the neat resin toughness to the composite and toughening mechanisms associated with crack growth. With tougher matrices, the higher critical strain energy release rates are only partially transferred to the composites, presumably because the fibers restrict the crack-tip deformation zones.
Document ID
19870061261
Document Type
Conference Paper
Authors
Hunston, Donald L.
(NBS, Polymer Science Div., Gaithersburg, MD, United States)
Moulton, Richard J.
(Hexcel Corp. Dublin, CA, United States)
Johnston, Norman J.
(NASA Langley Research Center Hampton, VA, United States)
Bascom, Willard D.
(Utah, University Salt Lake City, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
COMPOSITE MATERIALS
Distribution Limits
Public
Copyright
Other