NDLI: Finite-difference simulation of rayleigh wave scattering at a surface crack with experimental verification

Content Provider	IEEE Xplore Digital Library
Author	Chao Lu Zai-dong Zhang
Copyright Year	2008
Description	Author affiliation: Key Lab. of Nondestructive Testing of MOE, Nanchang Hangkong Univ., Nanchang (Chao Lu; Zai-dong Zhang)
Abstract	This paper describes a three-dimension finite-difference method to simulate the interaction of surface acoustic waves with finite-size, surface-breaking, and semi-circular cracks in steel specimen. The simulation is used to predict time-domain history of field displacements vertical to the surface of the steel specimen. We focus on the behavior of the reflection and transmission coefficient of the Rayleigh waves from such cracks in the far field of the crack, when the crack depth is comparable to the wavelength of the interrogating surface wave. The theoretical, finite-difference, and experimental results presented are in very good agreement over the range were the crack depth is much smaller or much larger compared to the wavelength of the incident Rayleigh wave. In the transition regime, between these two limiting cases, only the finite-difference and experimental data show good agreement since the theoretical predictions are no longer applicable. Furthermore, based on the finite-difference simulation and the laser interferometric measurement, the transmission coefficient of the surface wave scattering from the small surface crack was presented.
Starting Page	468
Ending Page	472
File Size	418919
Page Count	5
File Format	PDF
ISBN	9781424428915
DOI	10.1109/SPAWDA.2008.4775833
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-05
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rayleigh scattering Acoustic scattering Predictive models Steel surface-breaking cracks Surface waves surface waves scattering Surface acoustic waves Surface emitting lasers Surface cracks Finite difference methods Acoustic waves Finite difference method
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in