Characterization Of The Damping Properties Of High-Damping Alloys

Report Number: WL-TR-91-3078 Volume III, p. ICA-1 thru ICA-16
Author(s): Ritchie, I. G., Pan, Z- L.
Corporate Author(s): Materials and Mechanics Branch, AECL Research, Yhiteshell Laboratories
Date of Publication: 1991-08
Pages: 16
DoD Task:
Identifier: This paper is part of a conference proceedings. See ADA241313

Abstract:
Many problems of noise and vibration reduction cannot be solved by traditional methods ~sing mechanical dampers or high-damping viscoelastic materials (e.g., rubbers, polymers and plastics) . Often constraints imposed by the service environment , particularly those of stress, temperature and corrosive atmospheres, will force the design engineer to consider highdamping metals, alloys and composite materials. Unfortunately, characterization of the damping and stiffness properties of promising high damping metals and alloys has hardly ever been carried out in a systematic manner. Consequently, damping data are rarely accessible to the design engineer in a readily usable form. This lack of standard data has resulted in relatively few cases where metals and alloys have been chosen specifically for their high-damping properties. This paper outlines techniques and strategies to characterize the damping properties of high-damping metals and alloys that owe their damping behaviour to the major classes of high-damping mechanisms. The main goal of the characterization is to present the damping data in a form that can be readily used by the design engineer to predict the vibration response of a component fabricated from the high-damping metal or alloy in question.