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The impact of experimental measurement errors on long-term viscoelastic predictionsThe impact of flight error in measured viscoelastic parameters on subsequent long-term viscoelastic predictions is numerically evaluated using the Schapery nonlinear viscoelastic model. Of the seven Schapery parameters, the results indicated that long-term predictions were most sensitive to errors in the power law parameter n. Although errors in the other parameters were significant as well, errors in n dominated all other factors at long times. The process of selecting an appropriate short-term test cycle so as to insure an accurate long-term prediction was considered, and a short-term test cycle was selected using material properties typical for T300/5208 graphite-epoxy at 149 C. The process of selection is described, and its individual steps are itemized.
Document ID
19860063944
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tuttle, M. E.
(Washington, University Seattle, United States)
Brinson, H. F.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Composite Materials
Accession Number
86A48682
Funding Number(s)
CONTRACT_GRANT: NCC2-71
Distribution Limits
Public
Copyright
Other

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