Abstract
When a composite material is subjected to a homogeneous or inhomogeneous stress field, different phases undergo different temperature fluctuations due to the well-known thermoelastic effect. As a result, irreversible heat conduction occurs and entropy is produced. This entropy production is the genesis of elastothermodynamic damping. Recently, taking the second law of thermodynamics as a starting point, a general methodology for calculating the elasto-thermodynamic damping was presented by Kinra and Milligan. Using this method, we calculate the elastothermodynamic damping for two canonical problems concerning particle-reinforced metal-matrix composites: (1) a single spherical inclusion in an unbounded matrix and (2) anN layer finite concentric composite sphere. In both cases, a uniform radial time-harmonic loading is considered.
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This article is based on a presentation given in the Mechanics and Mechanisms of Material Damping Symposium, October 1993, in Pittsburgh, Pennsylvania, under the auspices of the SMD Physical Metallurgy Committee.
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Bishop, J.E., Kinra, V.K. Analysis of elastothermodynamic damping in particle-reinforced metal-matrix composites. Metall Mater Trans A 26, 2773–2783 (1995). https://doi.org/10.1007/BF02669635
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DOI: https://doi.org/10.1007/BF02669635