Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/140314
Title: | Orienting fatigue cracks using contact acoustic nonlinearity in scattered plate waves | Authors: | Wang, Kai Fan, Zheng Su, Zhongqing |
Keywords: | Engineering::Mechanical engineering | Issue Date: | 2018 | Source: | Wang, K., Fan, Z., & Su, Z. (2018). Orienting fatigue cracks using contact acoustic nonlinearity in scattered plate waves. Smart Materials and Structures, 27(9), 09LT01-. doi:10.1088/1361-665x/aad52f | Journal: | Smart Materials and Structures | Abstract: | Targeting quantitative delineation of nonlinear scatterers in elastic media and undersized fatigue cracks in particular, the present study is dedicated to investigation, from analytical, numerical, and experimental perspectives, of the underlying mechanism of interaction between guided ultrasonic waves (GUWs) and 'breathing' fatigue cracks - a representative nonlinear scatterer type. Under the modulation of probing GUWs, a 'breathing' crack scatters GUWs, in which the crack-triggered contact acoustic nonlinearity (CAN) is embodied. Analytical modeling demonstrates that the extracted CAN manifests unique scattering patterns associated with the crack slant, on which basis the crack can be oriented, without requiring reference to baseline signals. Experimental validation corroborates analytical prediction, in which an embryonic fatigue crack in an aluminum plate waveguide is oriented accurately and visualized in a pixelated image. | URI: | https://hdl.handle.net/10356/140314 | ISSN: | 0964-1726 | DOI: | 10.1088/1361-665X/aad52f | Schools: | School of Mechanical and Aerospace Engineering | Rights: | © 2018 IOP Publishing Ltd. All rights reserved. This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://doi.org/10.1088/1361-665X/aad52f | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MAE Journal Articles |
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