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Numerical and Experimental Investigation of Laser-induced Optoacoustic Wave Propagation for Damage Detection


Abstract An integrated experimental and numerical investigation for laser-generated optoacoustic wave propagation in structural materials is performed. First, a multi-physics simulation model is proposed to simulate the pulsed laser as a point heat source which hits the surface of an aluminum sheet. The pulsed laser source can generate a localized heating on the surface of the plate and induce an in-plane stress wave. ANSYS – a finite element analysis software – is used to build the 3D model and a coupled thermal-mechanical simulation is performed in which the heat flux is determined by an empirical laser-heat conversion relationship. The displacement and stress field-histories are obtained to get the time of arrival and wave propagation speed of th... (more)
Created Date 2016
Contributor Liu, Chen (Author) / Liu, Yongming (Advisor) / Wang, Liping (Committee member) / Jiao, Yang (Committee member) / Arizona State University (Publisher)
Subject Mechanical engineering
Type Masters Thesis
Extent 56 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Masters Thesis Mechanical Engineering 2016
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis