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Axial damping in metal-matrix composites. II: A theoretical model and its experimental verification

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Abstract

In the companion paper we describe a new experimental technique for resolving the phase difference between two electrical sinusoidal signals to an accuracy of 2π/216 or 9.587×10−7 radians. In this paper we demonstrate the use of that technique in measuring the intrinsic material damping of metal-matrix composites in axial tension using strain gages. In particular, the influence of ply, angle, θ, on the axial damping of a Pitch 55 graphite/6061 aluminum [±θ]s laminate is studied at a fixed frequency, a fixed strain level, and at room temperature. Recently, Ni and Adams proposed a model for predicting theflexural damping of a liminate from the flexural damping properties of a lamina. A close agreement between the model and the experiment was observed. As far as we know these are the first measurements of intrinsic material damping of metal-matrix composites.

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Authors and Affiliations

  1. Officers' Mess RAAF Base, Royal Australian Air Force, 2600, Fairbairn, ACT, Australia

    G. G. Wren (Squadron Leader)

  2. Department of Aerospace Engineering, Texas A&M University, 77843, College Station, TX

    V. K. Kinra (Professor)

  3. Center for Mechanics of Composites, Texas A&M University, 77843, College Station, TX

    V. K. Kinra (Professor)

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  1. G. G. Wren
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  2. V. K. Kinra
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Wren, G.G., Kinra, V.K. Axial damping in metal-matrix composites. II: A theoretical model and its experimental verification. Experimental Mechanics 32, 172–178 (1992). https://doi.org/10.1007/BF02324729

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  • DOI: https://doi.org/10.1007/BF02324729

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