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

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 the flexural 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. © 1992 Society for Experimental Mechanics, Inc.

author list (cited authors)

  • Wren, G. G., & Kinra, V. K.

complete list of authors

  • Wren, GG||Kinra, VK

publication date

  • January 1, 1992 11:11 AM