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Holographic interferometry measurements of transient bending waves in tubes and rings
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-2544-9168
1993 (English)In: Experimental mechanics, ISSN 0014-4851, E-ISSN 1741-2765, Vol. 33, no 4, p. 308-313Article in journal (Refereed) Published
Abstract [en]

Propagation bending waves are studied in a tube of steel and in a ring of aluminum. The waves are generated by the impact of a ballistic pendulum. Holographic interferometry, with a double-pulsed ruby laser as light source, is used to record the waves. A conical mirror is placed axially inside the tube. Axial illumination and axial observation directions, make it possible to view all sides of the tube simultaneously with a high sensitivity to radial deformation. The interferograms, which have an unusual perspective, are captured with a CCD-camera and then spatially transformed into an unwrapped strip of the tube wall. This makes the interpretation of the measurements simpler. The geometry of the tube causes the wave pattern to propagate with different speed and amplitude along and across the tube, even when the material itself is isotropic. A finite-element simulation of the impact is compared to the corresponding experiment. An impact on a ring with a defect is performed in order to study the effect on the wave pattern. The proposed method could be used in nondestructive testing of pipes.

Place, publisher, year, edition, pages
1993. Vol. 33, no 4, p. 308-313
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-4975DOI: 10.1007/BF02322146Local ID: 2fcafa00-bb54-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-4975DiVA: diva2:977849
Note
Godkänd; 1993; 20070205 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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CiteExportLink to record
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