Optical generation of high amplitude laser generated surface acoustic waves

Bradley Sherman, Oluwaseyi Balogun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The phase velocity scanning (PVS) approach is explored for pulsed laser generation of finite amplitude surface acoustic wave longitudinal stresses in solids. The approach involves the scanning of a focused laser line source in phase with a generated surface acoustic wave pulse, leading to a linear buildup of the SAW amplitude with distance. In principle, the dynamic stress produced by a SAW can be controlled using the PVS approach through the laser scanning distance, providing a means to access surface stresses generated by a thermoelastic source at levels up to the linear elastic limit. We investigate the dynamic longitudinal stress produced by the phase velocity scanning approach using theoretical modeling of the coupled thermoelastic wave equation in a solid halfspace, and confirm the approach using experimental measurements.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation, Volume 32
EditorsDale E. Chimenti, Donald O. Thompson
PublisherAmerican Institute of Physics Inc.
Pages337-344
Number of pages8
ISBN (Electronic)9780735411296
DOIs
StatePublished - Jan 1 2013
Event39th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2012 - Denver, United States
Duration: Jul 15 2012Jul 20 2012

Publication series

NameAIP Conference Proceedings
Volume1511
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference39th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2012
CountryUnited States
CityDenver
Period7/15/127/20/12

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Keywords

  • Finite Amplitude Surface Acoustic Waves
  • Laser Ultrasonics
  • Phase Velocity Scanning

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Sherman, B., & Balogun, O. (2013). Optical generation of high amplitude laser generated surface acoustic waves. In D. E. Chimenti, & D. O. Thompson (Eds.), Review of Progress in Quantitative Nondestructive Evaluation, Volume 32 (pp. 337-344). (AIP Conference Proceedings; Vol. 1511). American Institute of Physics Inc.. https://doi.org/10.1063/1.4789067