A Nonresonant Technique to Estimate the Mechanical Material Properties of a Viscoelastic Cylinder

Abstract

This report describes an innovative method for measuring the complex Young's modulus, complex shear modulus, and complex Poisson's ratio of a viscoelastic cylinder. The new nonresonant technique is based on measured transfer functions that are obtained by vibrating the cylinder linearly and rotationally with two different-size masses on its free end. Both masses have their own individual transfer functions, which can be measured and combined to yield the unknown Young's modulus and shear modulus values at every frequency where a measurement is made. Once these moduli are determined, Poisson's ratio can be calculated. The test method is subjected to Monte Carlo simulations to show that it is relatively unaffected by external noise in the data.

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Document Details

Document Type
Technical Report
Publication Date
Jan 10, 2001
Accession Number
ADA390490

Entities

People

  • Andrew John Hull

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Angular Motion
  • Connecting Rods
  • Dynamic Response
  • Elastic Properties
  • Equations
  • Experimental Data
  • Frequency
  • Materials
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Monte Carlo Method
  • Rods
  • Shear Modulus
  • Simulations
  • Stiffness
  • Transfer Functions

Readers

  • Computational Modeling and Simulation
  • Structural Dynamics.