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Influence of specimen features on the strength of boron/epoxy-reinforced metalExperimental results are presented which indicate that the ultimate tensile strength of aluminum reinforced with boron/epoxy composite may be significantly affected by the configuration of the specimen, and whether it was individually laid-up or cut from a larger piece of material. Coupon specimens which were individually laid-up exhibited strengths close to that predicted by theory. However, specimens cut from large plates had strengths about 38 percent of predicted values. All specimens had a one-half inch (12.7 mm) wide gage section. For individually laid-up specimens, it was found that specimens which were loaded through fiberglass tabs yielded higher ultimate tensile strengths than modified dogbone specimens with load introduction through stepped load-transfer regions. Machining along the edges was found to have little influence on the strength of the specimens used in this study.
Document ID
19750054661
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Herakovich, C. T.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Davis, J. G., Jr.
(NASA Langley Research Center Hampton, Va., United States)
Renieri, M. P.
Date Acquired
August 8, 2013
Publication Date
July 1, 1975
Subject Category
Composite Materials
Report/Patent Number
ASME PAPER 75-MAT-C
Accession Number
75A38733
Funding Number(s)
CONTRACT_GRANT: NGR-47-004-101
Distribution Limits
Public
Copyright
Other

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