Loss Factors Measured in Metal Matrix Composite Materials.

Abstract

The resonant dwell technique was used to measure loss factors at the fundamental frequency of a number of cantilever beam samples (100 to 200 Hz). Nine different metal matrix composites, three unreinforced base metals, and eight configurations of FP(AL203)/ZE41AMg were tested at three temperatures and four peak sample stress levels below 30,000 psi. The results indicate increasing loss factor with increasing stress level. Loss factors of all composites except graphite/aluminum composites were lower than those of the corresponding base metal. For FP/ZE41Mg composites, higher losses were observed with heat treatment, lower fiber volume fraction, and + or - 221/2 deg fiber orientation. Trends of loss factor with temperature varied with material type. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1984
Accession Number
ADA143542

Entities

People

  • J. Doherty
  • N. S. Timmerman

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Advanced Electronics
  • Cyber
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Base Metal
  • Cantilever Beams
  • Composite Materials
  • Engineers
  • Frequency
  • Graphitic Materials
  • Heat Treatment
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanics
  • Metal Matrix Composites
  • Metals
  • Military Research
  • Resonant Frequency
  • Silicon Carbide

Fields of Study

  • Materials science

Readers

  • Mathematics or Statistics
  • Reinforced Composite Materials