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A creep model for metallic composites based on matrix testing: Application to Kanthal compositesAn anisotropic creep model is formulated for metallic composites with strong fibers and low to moderate fiber volume percent (less than 40 percent). The idealization admits no creep in the local fiber direction and assumes equal creep strength in longitudinal and transverse shear. Identification of the matrix behavior with that of the isotropic limit of the theory permits characterization of the composite through uniaxial creep tests on the matrix material. Constant and step-wise creep tests are required as a data base. The model provides an upper bound on the transverse creep strength of a composite having strong fibers embedded in a particular matrix material. Comparison of the measured transverse strength with the upper bound gives an assessment of the integrity of the composite. Application is made to a Kanthal composite, a model high-temperature composite system. Predictions are made of the creep response of fiber reinforced Kanthal tubes under interior pressure.
Document ID
19900015877
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Binienda, W. K. (Akron Univ. OH., United States)
Robinson, D. N. (Akron Univ. OH., United States)
Arnold, S. M. (NASA Lewis Research Center Cleveland, OH., United States)
Bartolotta, Paul A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1990
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-103172
E-5550
NAS 1.15:103172
Accession Number
90N25193
Funding Number(s)
CONTRACT_GRANT: NAG3-379
PROJECT: RTOP 510-01-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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