Article
Acoustic emission and guided wave monitoring of fatigue crack growth on a full pipe specimen
Proceedings of SPIE
(2011)
Abstract
Continuous on-line monitoring of active and passive systems, structures and components in nuclear power plants will be critical to extending the lifetimes of nuclear power plants in the US beyond 60 years. Acoustic emission and guided ultrasonic waves are two tools for continuously monitoring passive systems, structures and components within nuclear power plants and are the focus of this study. These tools are used to monitor fatigue damage induced in a SA 312 TP304 stainless steel pipe specimen. The results of acoustic emission monitoring indicate that crack propagation signals were not directly detected. However, acoustic emission monitoring revealed crack formation prior to visual confirmation through the detection of signals caused by crack closure friction. The results of guided ultrasonic wave monitoring indicate that this technology is sensitive to the presence and size of cracks. The sensitivity and complexity of guided ultrasonic wave (GUW) signals is observed to vary with respect to signal frequency and path traveled by the GUW relative to the crack orientation.
Disciplines
Publication Date
2011
DOI
10.1117/12.881795
Publisher Statement
Copyright 2011 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Citation Information
"Acoustic emission and guided wave monitoring of fatigue crack growth on a full pipe specimen", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798424 (March 31, 2011); doi:10.1117/12.881795.