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Nonlinear viscoelastic characterization of thin polyethylene filmIn order to understand the state of stress and strain in a typical balloon fabricated from thin polyethylene film, experiment data in the literature reviewed. It was determined that the film behaves as a nonlinear viscoelasticity material and should be characterized accordingly. A simple uniaxial, nonlinear viscoelastic model was developed for predicting stress given a certain strain history. The simple model showed good qualitative agreement with results of constant rate, uniaxial accurately predicting stresses for cyclic strain histories typical of balloon flights. A program was outlined which will result in the development of a more complex nonlinear viscoelastic model.
Document ID
19810021731
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Wilbeck, J. S. (Southwest Research Inst. San Antonio, TX, United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1981
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-CR-156876
Accession Number
81N30270
Funding Number(s)
CONTRACT_GRANT: NAS6-3077
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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