The Evaluation Of Young's Complex Modulus Of Viscoelastic Materials
Report Number: WL-TR-91-3048 Volume I, p. CBB-1 thru CBB-17
Author(s): Ostiguy, G., Tardif, M.
Corporate Author(s): Ecole Polytechnique~ Montreal Quebec Canada
Laboratory: Wright Laboratory
Date of Publication: 1991-08
Pages: 17
Contract: Laboratory Research - No Contract
DoD Project: 2401
DoD Task: 240104
Identifier: This paper is part of a conference proceedings. See ADA241311
Abstract:
The motion of a root-excited cantilever beam coated on both sides with a vibration-damping viscoelastic material ls investigated. Measurements of relative amplitudes and phase lag between the free arid driven ends of the beam were used to characterize the variation of the viscoelastic material's complex Young's modulus with frequency. Effects of other parameters such as temperature or humidity on the complex modulus can be evaluated provided that tests are done in an environmental chamber. The method is readily applicable to beams with coatings of viscoelastic material of equal thickness on both sides and also to any beam manufactured out of a single, self-supporting material. It is efficient, fast and accurate. It is a valuable alternative to the ASTM E756-83 "Standard Method for Measuring Vibration – Damping Properties of Materials.”
Author(s): Ostiguy, G., Tardif, M.
Corporate Author(s): Ecole Polytechnique~ Montreal Quebec Canada
Laboratory: Wright Laboratory
Date of Publication: 1991-08
Pages: 17
Contract: Laboratory Research - No Contract
DoD Project: 2401
DoD Task: 240104
Identifier: This paper is part of a conference proceedings. See ADA241311
Abstract:
The motion of a root-excited cantilever beam coated on both sides with a vibration-damping viscoelastic material ls investigated. Measurements of relative amplitudes and phase lag between the free arid driven ends of the beam were used to characterize the variation of the viscoelastic material's complex Young's modulus with frequency. Effects of other parameters such as temperature or humidity on the complex modulus can be evaluated provided that tests are done in an environmental chamber. The method is readily applicable to beams with coatings of viscoelastic material of equal thickness on both sides and also to any beam manufactured out of a single, self-supporting material. It is efficient, fast and accurate. It is a valuable alternative to the ASTM E756-83 "Standard Method for Measuring Vibration – Damping Properties of Materials.”