Development of Test Methods for Measuring Damping of Fiber-Reinforced Materials

Abstract

The objective of this work was to develop a test method, or methods, for the measurement of damping of fiber-reinforced plastics. Damping is a measure of the energy loss of a material subjected to cyclic strain. This parameter has a major effect on the mechanical behavior of dynamically loaded structures. A number of test methods were reviewed for applicability to testing fiber-reinforced plastics. Two methods were selected: free-free vibration and forced vibration, both using a thin beam in transverse vibration. The free-free method given better accuracy, and the forced vibration method allows measurement of damping at various stress levels.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1970
Accession Number
AD0873990

Entities

People

  • A. J. Gustafson
  • Edgar H. Mcilwean
  • L. Thomas Mazza
  • Robert L. Rodgers

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Aircrafts
  • Army Aviation
  • Cantilever Beams
  • Elastic Properties
  • Equations
  • Fiber Reinforced Polymers
  • Fibers
  • Frequency
  • Government (Foreign)
  • Government Procurement
  • Governments
  • Materials
  • Materials Laboratories
  • Reinforced Plastics
  • Test Methods
  • Thermal Conductivity

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.