Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0266-3538(02)00231-2
Title: Damping characterization of magnesium based composites using an innovative circle-fit approach
Authors: Srikanth, N.
Gupta, M.Manoj 
Keywords: A. Particle-reinforced composites
B. Interface
C. Anelasticity
C. Residual stress
D. Non-destructive testing
Issue Date: Feb-2003
Source: Srikanth, N., Gupta, M.Manoj (2003-02). Damping characterization of magnesium based composites using an innovative circle-fit approach. Composites Science and Technology 63 (3-4) : 559-568. ScholarBank@NUS Repository. https://doi.org/10.1016/S0266-3538(02)00231-2
Abstract: In the present study, a new methodology of using free-free method coupled with circle-fit approach is used to determine damping of ceramic reinforced magnesium composites. This technique is based on classical vibration theory, by which the geometry and material properties of the metal matrix composites are related to the resonant frequency and structural damping of the test specimen. Using the fact that the ratio of the vibration response to the applied force fits to a circle in the Argand plane for each resonant frequency of the test specimen, the damping factor and natural frequency are predicted accurately for the test specimen. An attempt is made to rationalize the increase in damping capability of the MMC when compared against the monolithic specimen in terms of increase in density of the dislocations and presence of plastic zones due to thermal mismatch between the two phases, as well as due to the presence of extrinsic damping mechanisms such as elasto-thermodynamic damping. © 2002 Elsevier Science Ltd. All rights reserved.
Source Title: Composites Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/59836
ISSN: 02663538
DOI: 10.1016/S0266-3538(02)00231-2
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