Numerical simulation of nonlinear ultrasonic guided waves for micro-cracking detection in pipelines

Fang Liu, Ye Lu, Feng Lin, Zhen Wang, Fucai Li, Yu Bai

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

In this study, the interaction between nonlinear ultrasonic guided waves and micro-cracking in pipelines was simulated using finite element method (FEM). The numerical results indicate that after interacting with a micro-crack, the second or higher order harmonics were caused by nonlinear acoustic effects at the micro-crack. The dynamic responses of the pipe with and without a crack were studied in the time domain and frequency domain, respectively. A series of crack sizes were simulated to investigate the sensitivity of the proposed method. In addition, besides the ultrasonic guided waves, low-frequency vibration was simultaneously applied on the pipe with a micro-crack, the simulation results show that the low-frequency vibration could strengthen the higher harmonics, and that its function with respect to cracking identification was highlighted. The numerical results will provide a valuable guide for the application of nonlinear ultrasonic techniques for micro-damage detection in pipelines
Original languageEnglish
Title of host publicationProceedings of SMAR2015, the 3rd Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures
EditorsAlper Ilki, Masoud Motavalli, Pinar Inci, Michele Kohli
Place of PublicationDubendorf Switzerland
PublisherEMPA, Swiss Federal Laboratories for Materials Science and Technology
Pages1 - 8
Number of pages8
ISBN (Print)9783905594652
Publication statusPublished - 2015
EventInternational Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2015) - Antalya, Turkey
Duration: 7 Sep 20159 Sep 2015
Conference number: 3rd
https://www.bridgeweb.com/SMAR-2015-Third-Conference-on-Smart-Monitoring-AssessmentandRehabilitation-of-Civil-Structures/3363

Conference

ConferenceInternational Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2015)
Abbreviated titleSMAR 2015
CountryTurkey
CityAntalya
Period7/09/159/09/15
Internet address

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