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Transient bending waves in anisotropic plates studied by hologram interferometry
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-2544-9168
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
1989 (English)In: Experimental mechanics, ISSN 0014-4851, E-ISSN 1741-2765, Vol. 29, no 4, p. 409-413Article in journal (Refereed) Published
Abstract [en]

Propagating bending waves are studied in plates made of glass-fiber reinforced polyester. The waves are generated by the impact of a ballistic pendulum. Hologram interferometry, with a double pulsed ruby laser as light source, is used to record the out of plane motion of the waves. The interferograms have an elliptic-like symmetry for an orthotropic plate, while the wave pattern for a symmetric angle-ply reinforced plate has a symmetry about the axes of reinforcements. Experimental data are compared on one hand to analytical results obtained by assuming that the orthotropic plate can be described as if isotropic along the main axes, and on the other hand to numerical results from calculations using the finite-element method. The effective Young's modulus raised to power 1/4 is shown to be an important parameter for the description of the dispersive wave pattern. A defect in the plate alters the wave pattern in the interferograms significantly. This may have technical use.

Place, publisher, year, edition, pages
1989. Vol. 29, no 4, p. 409-413
National Category
Applied Mechanics Other Materials Engineering
Research subject
Experimental Mechanics; Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-9771DOI: 10.1007/BF02323859ISI: A1989CM87500009Scopus ID: 2-s2.0-0024899537Local ID: 87477e40-bb57-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-9771DiVA, id: diva2:982709
Note
Godkänd; 1989; 20061026 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Fällström, Karl-EvertLindgren, Lars-ErikMolin, Nils-Erik

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