Affiliation:
1. RMIT University and Defence Science & Technology Group, Melbourne 1
2. Royal Netherlands Aerospace Centre (NLR), Emeritus 2
Abstract
Abstract
This article discusses several examples of fatigue load histories that intentionally create artificial fracture-surface markings during testing such that they are measurable by post-test quantitative fractography (QF). It reviews a number of methods for providing fatigue fracture-surface markers to aid QF of fatigue crack growth (FCG). These methods are based on load changes, including reordering the basic load histories and/or adding loads to them. The article also provides some guidelines for obtaining recognizable FCG markers for a variety of load histories and crack-growth regimes for coupons, components, and, particularly, full-scale fatigue tests.
Reference39 articles.
1. MortimerA. and DavidsonM.W., “Microscope Objectives, Numerical Aperture and Resolution,” Olympus America Inc. and The Florida State University, 2004, http://www.microscopy.fsu.edu/primer/anatomy/numaperture.html