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Inelastic micromechanics of curing stresses in compositesThe combined finite element/laminate analysis method is used to study the thermal curing stresses in composite materials with a nonlinearly elastic matrix subject to creep. The application of this analysis to boron/epoxy composites shows that curing stress levels in the laminate are of sufficient magnitude to cause widespread yielding in the matrix. The stress levels, based on the creep analysis of a typical laminate cure cycle, indicate that the residual stresses can vary from 80 to 100% of the residual stress estimates based on linear thermoelastic analysis. It is shown that there is virtually no change in the static longitudinal or shear response of unidirectional and cross-ply boron/epoxy laminates as a result of curing stresses. Results of a series of constant-stress, high temperature creep tests are presented.
Document ID
19760039501
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Foye, R. L.
(U.S. Army, Air Mobility Research and Development Laboratory, Hampton Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Composite Materials
Meeting Information
Meeting: Inelastic behavior of composite materials
Location: Houston, TX
Start Date: November 30, 1975
End Date: December 5, 1975
Accession Number
76A22467
Funding Number(s)
CONTRACT_GRANT: NAS1-12252
Distribution Limits
Public
Copyright
Other

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