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Mechanical and thermal effects in a steel plate impacted by a focused laser pulse
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå tekniska universitet.
Luleå tekniska universitet.
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1997 (English)In: Nondestructive Testing and Evaluation, ISSN 1058-9759, E-ISSN 1477-2671, Vol. 13, no 5, p. 293-307Article in journal (Refereed) Published
Abstract [en]

A short laser pulse from a 1 J ruby laser is focused at a steel plate. The effect will be that the material surface at the impact point becomes very rapidly heated. Metal vapour leaves the surface at a very high velocity. That is, both a mechanical impulse and local thermal energy are transferred to the plate. The mechanical impulse creates propagating bending waves in the plate, which in turn creates transient sound waves in the surrounding air. The heated spot at the plate surface creates thermal stresses in the plate which give rise to an out-of-plane deformation of the plate. This deformation is added up to the propagating bending waves. These effects are studied in experiments using pulsed holographic interferometry.

Place, publisher, year, edition, pages
1997. Vol. 13, no 5, p. 293-307
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-11165Local ID: a11f5b90-bb56-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-11165DiVA, id: diva2:984114
Note
Godkänd; 1997; 20061026 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Fällström, Karl-EvertMolin, Nils-ErikWåhlin, Anders

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