Measurement of nonlinear damping in a Gr/Al metal-matrix composite
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This paper is concerned with the measurement of nonlinear (i.e., strain amplitude dependent) intrinsic material damping in continuous-fiber-reinforced metal-matrix composites (MMC). The particular MMC studied is a four-ply [±θ]S P55Gr/6061 Al composite with θ = 0, 15, 30, 45, 60, 75 deg. A popular method for measuring damping is the free-decay of flexural vibrations of a cantilevered beam. However, the strain field in a cantilevered beam is inhomogeneous. Therefore, for materials whose damping is nonlinear, the measured specimen damping is not equal to the intrinsic material damping. Using an elementary algorithm developed by Lazan, the authors extract nonlinear intrinsic material damping from the nonlinear specimen damping.
author list (cited authors)
Kinra, V. K., Ray, S., Zhu, C., Friend, R. D., & Rawal, S. P.
complete list of authors
Kinra, VK||Ray, S||Zhu, C||Friend, RD||Rawal, SP