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Shock and Vibration
Volume 8 (2001), Issue 5, Pages 287-301
http://dx.doi.org/10.1155/2001/969160

Modeling of Shock Propagation and Attenuation in Viscoelastic Components

R. Rusovici,1 G.A. Lesieutre,2 and D.J. Inman3

1STI Technologies, PCB Group, Rochester, NY 14623, USA
2Department of Aerospace Engineering, The Pennsylvania State University, University Park, PA 16802, USA
3Center for Intelligent Material Systems and Structures, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA

Received 29 November 2000; Revised 29 November 2000

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Protection from the potentially damaging effects of shock loading is a common design requirement for diverse mechanical structures ranging from shock accelerometers to spacecraft. High damping viscoelastic materials are employed in the design of geometrically complex, impact-absorbent components. Since shock transients are characterized by a broad frequency spectrum, it is imperative to properly model frequency dependence of material behavior over a wide frequency range. The Anelastic Displacement Fields (ADF) method is employed herein to model frequency-dependence within a time-domain finite element framework. Axisymmetric, ADF finite elements are developed and then used to model shock propagation and absorption through viscoelastic structures. The model predictions are verified against longitudinal wave propagation experimental data and theory.