Accession Number : AD0746261

Title :   Acoustic Emission and Fracture Mechanics Testing of Metals and Composites.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Tetelman,A. S.

Report Date : JUL 1972

Pagination or Media Count : 46

Abstract : Acoustic emission testing has found many uses in recent years and new applications are constantly being uncovered. One of the most fruitful areas for application lies in the characterization of microscopic processes of yielding and fracture, and macroscopic processes of slow crack growth and onset of fast crack propagation. This paper has described these processes and empahsized that the total counts and count rate depend on the energy released per event and the density of events per unit of deformation. The models presented herein are first order approximations which await confirmation. (Author)

Descriptors :   (*NONDESTRUCTIVE TESTING, ACOUSTIC DETECTORS), (*COMPOSITE MATERIALS, NONDESTRUCTIVE TESTING), (*METALS, NONDESTRUCTIVE TESTING), CRACKS, CRACK PROPAGATION, STRESSES, DEFORMATION, TENSILE PROPERTIES, COUNTING METHODS, STEEL

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography
      Test Facilities, Equipment and Methods
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE