Abstract
A local-field theory is developed to calculate the development of the overall creep strain of a fiber-reinforced metal-matrix composite, where the creep rate of the constituents may depend nonlinearly on the stress and both phases may undergo the primary as well as the secondary creep. The theory is constructed with the combination of Eshelby’s equivalent inclusion principle, Kroner’s elastic constraint, Mori and Tanaka’s mean-field concept, and Luo and Weng’s local solution of a three-phase cylindrically concentric solid; it is intended for the low to moderate fiber concentration within the small creep-strain range. The theory thus developed also serves to evaluate the accuracy of the simpler mean-field theory, which is found to be reliable enough for both the axial and the plane-strain, biaxial tensile creep, but generally less so for the transverse tensile creep, and the transverse and axial shear creep. As compared to the longitudinal tensile creep data of a Borsic/aluminum composite, the theoretical prediction, though slightly lower, appears to lie within an acceptable range of accuracy.
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Wang, Y.M., Weng, G.J. (1991). A Local-Field Theory for the Overall Creep of Fiber-Reinforced Metal-Matrix Composites. In: Dvorak, G.J. (eds) Inelastic Deformation of Composite Materials. International Union of Theoretical and Applied Mechanics. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9109-8_24
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DOI: https://doi.org/10.1007/978-1-4613-9109-8_24
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