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Record 1 of 3163
Inelastic micromechanics of curing stresses in composites
Author and Affiliation:
Foye, R. L.(U.S. Army, Air Mobility Research and Development Laboratory, Hampton, Va., United States)
Abstract: The 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.
Publication Date: Jan 01, 1975
Document ID:
19760039501
(Acquired Dec 01, 1995)
Accession Number: 76A22467
Subject Category: COMPOSITE MATERIALS
Document Type: Conference Proceedings
Publication Information: (SEE A76-22460 09-24)
Publisher Information: United States
Meeting Information: Inelastic behavior of composite materials; November 30-December 5, 1975; Houston, TX
Contract/Grant/Task Num: NAS1-12252
Financial Sponsor: NASA; United States
Organization Source: Army Air Mobility Research and Development Lab.; Hampton, VA, United States
Description: 35p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ANELASTICITY; BORON-EPOXY COMPOSITES; COMPOSITE MATERIALS; CURING; STRESS DISTRIBUTION; THERMOELASTICITY; CREEP TESTS; FINITE ELEMENT METHOD; LAMINATES; MICROSTRUCTURE; RESIDUAL STRESS
Imprint And Other Notes: In: Inelastic behavior of composite materials; Proceedings of the Winter Annual Meeting, Houston, Tex., November 30-December 5, 1975. (A76-22460 09-24) New York, American Society of Mechanical Engineers, 1975, p. 177-211.
Availability Source: Other Sources
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