Compressional Damping in Three-Layer Beams Incorporating Nearly Incompressible Viscoelastic Cores.

Abstract

The transverse free mechanical impedance response of an elastic-viscoelastic-elastic beam incorporating the compressional damping mechanism is considered. The work of Douglas and Yang is extended to include shear deformation and rotary inertia in the elastic layers. The effects of nearly incompressible viscoelastic damping cores on the compressional frequency, and hence on the spectral range of damping effectiveness for the composite, is also discussed. Results of the analysis are shown to compare favorably with experimental results for a damped three-layer beam which was optimized for compressional damping and in which the influence of the shear damping mechanism was intentionally minimized. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1980
Accession Number
ADA091284

Entities

People

  • Bruce Edward Douglas
  • David W Taylor

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Differential Equations
  • Dynamic Response
  • Elastic Properties
  • Engineering
  • Equations
  • Frequency
  • Impedance
  • Inertia
  • Materials
  • Mechanical Impedance
  • Modulus Of Elasticity
  • Shear Modulus
  • Transverse
  • Vibration
  • Waves

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.
  • Semiconductor Device Technology