Accession Number : AD0837123

Title :   MEASUREMENT OF DAMPING IN FIBER REINFORCED PLASTICS,

Corporate Author : ARMY AVIATION MATERIEL LABS FORT EUSTIS VA

Personal Author(s) : Gustafson, Arthur J., Jr. ; Paxson, Ernest B. ; Mazza, L. Thomas

Report Date : 1968

Pagination or Media Count : 13

Abstract : Based on the close correlation between experimental and theoretical values of damping in 2024-T4 aluminum, the free-free test apparatus and experimental procedure described herein will yield true values of damping of thin beams in the frequency domain of 16 to 157 Hertz. In addition, the forced vibration test technique is suitable for measuring damping in fiber glass for the frequency range of 16 to 157 Hertz and from 2000-psi root stress up to that value of stress at which the resonance curve becomes unsymmetrical. (Author)

Descriptors :   (*GLASS TEXTILES, STRESSES), (*DAMPING, TEST METHODS), VIBRATION, TEST EQUIPMENT, BEAMS(STRUCTURAL), ALUMINUM ALLOYS, CALIBRATION, RESONANT FREQUENCY, REINFORCED PLASTICS, SUPERLOW FREQUENCY.

Subject Categories : Laminates and Composite Materials
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE