Strain Dependent Damping Characteristics of a High Damping Manganese-Copper Alloy

Abstract

Measurement techniques for the determination of strain-dependent damping characteristics of materials in an air environment are being investigated. The material is a high damping manganese-copper alloy called sonoston. The measurement techniques employ cantilevered flat beam specimens in bendings and cylindrical specimens in torsion. The specimens were subjected to three different heat and aging treatments. Pure random and sinusoidal sweep excitations are used as an excitation source in the frequency range of 20 to 500 HZ. Miniature accelerometers and strain gages were mounted on specimens to obtain both input excitation and output responses. The results of the investigation are presented graphically as damping factor vs. resonant frequency, damping factor vs. strain, damping factor vs. input acceleration, strain vs. resonant frequency, strain vs. input acceleration, and input acceleration vs. resonant frequency.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA175264

Entities

People

  • Dwight D. Dew

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Blood Coagulation Factors
  • Copper Alloys
  • Engineering
  • Frequency
  • Frequency Shift
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanical Working
  • Metals
  • Modulus Of Elasticity
  • Physical Properties
  • Resonant Frequency
  • Shear Modulus
  • Strain Gages
  • Vibration

Fields of Study

  • Engineering

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Structural Dynamics.