Accession Number : ADD017376

Title :   Vibration-Damping Structural Component.

Descriptive Note : Patent Filed 3 Mar 93, patented 29 Nov 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Barrett, David J

Report Date : 29 Nov 1994

Pagination or Media Count : 6

Abstract : An improvement to a vibration-damping structural component of the type having viscoelastic material sandwiched between two outer structural layers of stiffness material is disclosed. An inner layer of stiffness material having two predominant surfaces is positioned between the two outer structural layers of stiffness material and is fixed along an edge of one of the two pre-dominant surfaces to one of the two outer structural layers of stiffness material along a line thereon corresponding to a nodal line of vibration. The remainder of the two predominant surfaces is fixed to the viscoelastic material. During flexural vibrations, the inner layer displaces in-plane with respect to the inner surfaces of the outer layers, causing greater shearing in the viscoelastic material, and therefore causing greater vibration damping in the structural component. (MM)

Descriptors :   *VIBRATION, *LAMINATES, *DAMPING, *PATENTS, AIRCRAFT, COMPOSITE MATERIALS, STIFFNESS, VISCOELASTICITY, DISPLACEMENT, FLEXURAL PROPERTIES, STRUCTURAL COMPONENTS, SANDWICH CONSTRUCTION

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE