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The effects of compressive preloads on the compression-after-impact strength of carbon/epoxyA preloading device was used to examine the effects of compressive prestress on the compression-after-impact (CAI) strength of 16-ply, quasi-isotropic carbon epoxy test coupons. T300/934 material was evaluated at preloads from 200 to 4000 lb at impact energies from 1 to 9 joules. IM7/8551-7 material was evaluated at preloads from 4000 to 10,000 lb at impact energies from 4 to 16 joules. Advanced design of experiments methodology was used to design and evaluate the test matrices. The results showed that no statistically significant change in CAI strength could be contributed to the amount of compressive preload applied to the specimen.
Document ID
19930003490
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Nettles, A. T. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Lance, D. G. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1992
Subject Category
Composite Materials
Report/Patent Number
M-701
NAS 1.60:3303
NASA-TP-3303
Accession Number
93N12678
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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