Vibration-Damping Structural Member
Patent, filed 9 Feb 1990, patented 11 Feb 1992
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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A structural element or member is disclosed that resists or damps vibration from loads applied along a given axis without significantly sacrificing stiffness, through the use of stress coupling within an anisotropic material. Essentially, the structural member comprises alternating layers or laminates of stiff and viscoelastic or damping material bonded together to form a laminated structure. The laminated structural member is oriented to receive the applied load in a direction that is parallel to the laminates. At least one of the stiff laminates shows anisotropic behavior when acted upon by the axial load, causing shear strain and concomitant transverse displacement therewithin, thereby loading the viscoelastic laminate in shear.
- Laminates and Composite Materials
- Construction Equipment, Materials and Supplies