Remote Acoustic Monitoring of Thin Laminates
Blekinge Institute of Technology, School of Engineering, Department of Mathematics and Natural Sciences2007 (English)Conference paper (Refereed) Published
Understanding the change in material properties in time is necessary for in-service diagnosis of structures and prevention of accidents. Therefore, a new experimental technique for evaluating Young’s (or elastic) modulus of a vibrating thin sheet from a dynamic measurement is presented. The technique utilizes bending resonance from a remote acoustic excitation. Equations relating the natural frequencies to the mechanical properties are obtained, and Young’s modulus is subsequently determined experimentally using the implemented dynamic measurement method. Young’s modulus values from the dynamic test are then compared with those (static) obtained by a standard tensile test and those obtained by the theory of laminated materials. The proposed technique appears relatively simple and is applied in this paper to laminates initially having no (or negligible) bending stiffness, and used in packaging industries. This work emphasizes the feasibility of a remote condition monitoring of components in-service by evaluating changes in the material properties.
Place, publisher, year, edition, pages
Harrogate, UK: COXMOOR , 2007.
Condition Monitoring, Vibration, Young’s modulus, Resonance, Acoustic, Non-Destructive Testing.
Psychology Applied Mechanics
IdentifiersURN: urn:nbn:se:bth-9036Local ID: oai:bth.se:forskinfo0FD5309E475B91F1C125733700386D79ISBN: 978-1-901892-22-2OAI: oai:DiVA.org:bth-9036DiVA: diva2:836812