Thermal expansion of morphologically textured short-fiber composites
- Univ. of Colorado, Boulder, CO (United States). Dept. of Mechanical Engineering
- National Inst. of Standards and Technology, Boulder, CO (United States). Materials Science and Engineering Lab.
- Argonne National Lab., IL (United States). Materials Science Div.
The authors studied, both experimentally and theoretically, the thermoelastic response of short-fiber composites with a preferred orientation of the short fibers, i.e., a morphological texture. Their theoretical efforts are general, being applicable to any composite system with constituents that exhibit linear thermoelastic response. They propose a relatively simple micromechanics model to predict the thermal expansion coefficient (CTE), and give simple, easily used, results for orientation distributions of practical significance. They also present a convenient approach to represent the effects of texture on thermal expansion of short fiber composites, namely, a texture map. Their experimental efforts focus on a series of extruded SiC/Al short-fiber composites that they have fully characterized. This includes measurement of the complete set of elastic constants, the volume fraction, and the fiber orientation distribution function (ODF) using neutron diffraction. The authors measured the axial and transverse components of the overall CTEs of these composites using a quartz-rod dilatometer. Predictions are in good agreement with measurements.
- OSTI ID:
- 316077
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 30, Issue 1; Other Information: PBD: Jan 1999
- Country of Publication:
- United States
- Language:
- English
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