Accession Number:
ADA001621
Title:
A Laser Interferometric Technique for Crack Surface Displacement Measurement,
Descriptive Note:
Corporate Author:
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
Personal Author(s):
Report Date:
1974-07-01
Pagination or Media Count:
33.0
Abstract:
The opening of a fatigue crack in an aluminum specimen was measured by optical interference from single grooves ruled on both sides of the crack. Displacement can be measured with a sensitivity of 0.1 micron, making the technique particularly useful in studies of crack closure. Details of this easy, inexpensive technique are discussed in this report.
Descriptors:
Subject Categories:
- Metallurgy and Metallography
- Test Facilities, Equipment and Methods