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Compression-after-impact testing of thin composite materialsA new method has been devised to test composite specimens as thin as 8 plies and up to 7.6 cm in width for compression strength. This method utilizes a fixture incorporating the best features of the Celanese and IITRI fixtures combined with an antibuckling jig developed at the University of Dayton Research Institute. This new method uses up to 83 percent less material than the most commonly used compression-after-impact technique (which calls for a 48 ply test specimen) and can also be performed on smaller loading frames since a much smaller force is needed to fail the specimen. The thickness of the test specimen can be fabricated to exactly match production part thickness, thus yielding more meaningful results. CAI tests were performed on IM6/3501 carbon/epoxy utilizing this new method. To verify the design, a series of tests were performed in which undamaged specimens were tested using the new fixture and ASTM D 3410-87 (Celanese compression test) and the results compared. The new fixture works well and will be a valuable asset to MSFC's damage tolerance program.
Document ID
19920068890
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nettles, Alan T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Hodge, Andrew J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Composite Materials
Meeting Information
Meeting: International SAMPE Technical Conference
Location: Kiamesha Lake, NY
Country: United States
Start Date: October 21, 1991
End Date: October 24, 1991
Accession Number
92A51514
Distribution Limits
Public
Copyright
Other

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