1 May 1996 Theoretical modeling of wave localization due to material damping
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Abstract
A structural health monitoring technique developed at the Center for Intelligent Material Systems and Structures (CIMSS) relies on the high frequency impedance characteristics of the structure to qualitatively detect incipient damage. An important feature of this technique is the limited PZT actuator-sensor sensing area, which has been attributed to energy dissipation through material damping and nonconservative joints. In this paper, a study of the structural damping effect at high frequency on the localized sensing region is presented. A theoretical model of the energy dissipation, using a wave propagation approach and the correspondence principle is derived to obtain the specific damping capacity. For this purpose, an infinitely long bolted beam has been simultaneously analyzed using numerical and experimental procedures to obtain a quantification of the energy dissipated through the structure. The results of this study are presented in part II of this paper.
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Jaime Esteban, Jaime Esteban, Frederic Lalande, Frederic Lalande, Craig A. Rogers, Craig A. Rogers, } "Theoretical modeling of wave localization due to material damping", Proc. SPIE 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems, (1 May 1996); doi: 10.1117/12.239036; https://doi.org/10.1117/12.239036
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