Ultrasonic Measurements Research: Progress in 1987
Abstract
The purpose of this work is to make accurate measurements in acoustic emission (AE) and ultrasonics and to relate all measurements to national standards. The problems presently under study are: (1) the characterization of AE transducers, (2) the determination of the transfer characteristics (Green's functions) of media and structures, (3) the development of well defined sources, (4) the development of high fidelity transducers, and (5) the development of improved ultrasonic and acoustic emission techniques. The AE transducer calibration facility has been improved to maintain it as a world-class facility. The effect of test specimen characteristics have been determined both by analysis and by experiment. The feasibility of experimentally determining mechanical Green's functions has been demonstrated. A high fidelity transducer has been developed to measure dynamic, in-plane motion; its response agrees well with theoretical predictions. Keywords: Acoustic emission; Calibration; Physical acoustics; Transducers; Ultrasonics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1987
- Accession Number
- ADA188506
Entities
People
- D. G. Eitzen
- F. R. Breckenridge
- M. Greenspan
- N. N. Hsu
- T. M. Proctor
Organizations
- National Institute of Standards and Technology