@inproceedings{e01d9e282b88411390764579386e8881,
title = "Nonlinear parameters for a diagnosis of micro-scale cracks using a Nonlinear Resonant Ultrasound Spectroscopy (NRUS)",
abstract = "Micro-scale cracks in a material are one of the major factors for the determination of life of a structure as well as for the structural integrity. Micro-scale cracks caused by materials degradation and damage will affect the resonance spectrum of a sample only very slightly and be masked by the resolution of the frequency spectrum when we use a standard linear Resonance Ultrasound Spectroscopy (RUS) analysis. Micro-scale damages, however, can produce a nonlinear elastic behavior. The nonlinearity can be measured by increasing the dynamic strain i.e. excitation amplitude in a Nonlinear Resonant Ultrasound Spectroscopy (NRUS) device. In this paper a feasibility of NRUS for a diagnosis of micro-cracks are investigated for low carbon steel CT specimens. A shift of resonance frequency and normalized amplitude of resonance pattern are chosen to correlate the micro-scale cracks or damage. These two nonlinear parameters can be a potential tool for the detection of micro-cracks or damage of a material.",
keywords = "Micro-scale cracks, Nonlinear resonance ultrasound spectroscopy",
author = "Cheong, \{Yong Moo\} and Alam, \{M. K.\} and Kim, \{Cheol Gi\}",
year = "2010",
doi = "10.1063/1.3362237",
language = "English",
isbn = "9780735407480",
series = "AIP Conference Proceedings",
pages = "1439--1444",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE ; Conference date: 26-07-2009 Through 31-07-2009",
}