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Prediction of composite hygral behavior made simpleA convenient procedure is described to determine the hygral behavior (moisture expansion coefficients and moisture stresses) of angleplied fiber composites using a pocket calculator. The procedure consists of equations and appropriate graphs for various (+ or - theta) ply combinations. These graphs present reduced stiffness and moisture expansion coefficients as functions of (+ or - theta) in order to simplify and expedite the use of the equations. The procedure is applicable to all types of balanced, symmetric fiber composites including interply and intraply hybrids. The versatility and generality of the procedure is illustrated using several step-by-step numerical examples.
Document ID
19820008308
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chamis, C. C. (NASA Lewis Research Center Cleveland, OH, United States)
Sinclair, J. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1982
Subject Category
Composite Materials
Report/Patent Number
E-1022
NASA-TM-82780
Report Number: E-1022
Report Number: NASA-TM-82780
Meeting Information
Meeting: Ann. Conf. of the Soc. of the Plastics Ind. (SPI)
Location: Washington, DC
Country: United States
Start Date: January 12, 1982
End Date: January 15, 1982
Accession Number
82N16181
Funding Number(s)
PROJECT: RTOP 505-33-62
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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