Investigations of viscoelastic structure behavior using a three-dimensional anelastic displacement field finite element

Razvan Rusovici; George Andre Lesieutre

doi:10.1117/12.483963

31 July 2003 Investigations of viscoelastic structure behavior using a three dimensional anelastic displacement field finite element

Razvan Rusovici, George Andre Lesieutre

Author Affiliations +

Proceedings Volume 5052, Smart Structures and Materials 2003: Damping and Isolation; (2003) https://doi.org/10.1117/12.483963
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

Space systems comprise sensitive electronics and delicate mechanical instruments that need to be protected against harsh vibration and shock loads encountered during launch or landing. High damping viscoelastic materials are often used in the design of geometrically complex, shock and vibration isolation components. Since shock transients are characterized by a broad frequency spectrum, and since viscoelastic materials are characterized by frequency-dependent mechanical properties, it is necessary to properly model this behavior over the frequency domain of interest. The Anelastic Displacement Fields (ADF) method is employed herein to model frequency-dependence of material properties within a time-domain finite element framework. A solid, four-node tetrahedron, ADF-based finite element is developed for single and multiple ADF. This particular element is then validated and used for the general purpose of investigating damping in given structures that employ viscoelastic materials. The new three-dimensional finite element may also be used to investigate the potential phase dependence of the Poisson's ratio for such materials. The model predictions are compared against theory.

Citation Download Citation

Razvan Rusovici and George Andre Lesieutre "Investigations of viscoelastic structure behavior using a three dimensional anelastic displacement field finite element", Proc. SPIE 5052, Smart Structures and Materials 2003: Damping and Isolation, (31 July 2003); https://doi.org/10.1117/12.483963

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