Accession Number : AD0783227

Title :   Characteristization of Acoustic Emission during Fatigue Loading of Composite Specimens,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG COLL OF ENGINEERING

Personal Author(s) : Williams,Richard S. ; Reifsnider,Kenneth L.

Report Date : MAY 1974

Pagination or Media Count : 30

Abstract : Strain and load controlled fatigue tests were run on boron-aluminum and boron-epoxy angle-plied specimens. Acoustic emission data was recorded using a gating technique that eliminated most extraneous noise. Various material parameters were monitored during the test. A good correlation between acoustic emission and damage extent and propagation was obtained. This was evidenced by an apparent first order linear relationship between dynamic compliance and totalized acoustic emission. A basis for an energy based failure model was formulated and discussed. (Author)

Descriptors :   *Composite materials, *Acoustic emissions, *Fatigue(Mechanics), Loads(Forces), Damage, Fracture(Mechanics)

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE