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Pilot study of the dynamic impact response of a composite plate
Aeronautical Research Institute of Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
1990 (English)Report (Other (popular science, discussion, etc.))
Abstract [en]

An experimental pilot study of the dynamic response of composite plates in low mass impacts is described. The purpose was to make an initial investigation of the validity of an analytical impact solution recently presented. In the experiments a small spherical pendulum was used to strike a carbon fiber/epoxy laminate at various impact velocities. The time histories of the impactor acceleration (contact force), plate displacement and flexural strains were recorded. The plate displacement history was studied using holographic laser interferometry. Only a limited number of displacement results were obtained, since the holographic method leads to a very large number of densely spaced interference fringes even at moderate impact velocities. The theoretical predictions of contact force and plate displacement were found to be very good, although the flexural strains were only predicted qualitatively. An almost linear relation was found between impact velocity and the maximum values of contact force, plate displacement and flexural strains, which is in excellent agreement with the analytical predictions.

Place, publisher, year, edition, pages
Stockholm: Aeronautical Research Institute of Sweden , 1990.
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-23016Local ID: 5483f7c0-49fa-11de-93f6-000ea68e967bOAI: oai:DiVA.org:ltu-23016DiVA, id: diva2:996065
Note
Godkänd; 1990; Bibliografisk uppgift: Report Number FFA-TN-1990-27 ETN-91-98402; 20090526 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2025-10-21Bibliographically approved

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Gren, Per

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