COD measurements at various positions along a crackLoad versus crack-opening-displacement (COD) was measured at various positions along the border of a fatigue crack as it grew from a small surface crack on the edge of an aluminum specimen into a through-the-thickness crack. Displacements were measured with a laser-based interferometric system with a gage length of 70 microns and a resolution of 0.01 micron. These load-COD curves can be used to determine opening loads and thereby investigate the effect of closure on the growth of small cracks. In general, the opening loads decrease as the crack grows.
Document ID
19900033013
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sharpe, W. N., Jr. (Johns Hopkins Univ. Baltimore, MD, United States)
Su, X. (Johns Hopkins University Baltimore, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Structural Mechanics
Meeting Information
Meeting: International Congress on Experimental Mechanics
Location: Portland, OR
Country: United States
Start Date: June 6, 1988
End Date: June 10, 1988
Sponsors: SEM, Korean Society of Mechanical Engineers, Japan Society of Mechanical Engineers