Dynamic behaviour of laterally loaded pultruted composite beams

J.A. Epaarachchi; P. Birt

doi:doi:10.1051/dymat/2009097

All issues

Volume 1 (2009)

10.1051/dymat/2009097

Abstract

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		687 - 693
Section		Industrial Applications
DOI		https://doi.org/10.1051/dymat/2009097
Published online		15 September 2009

DYMAT 2009 (2009) 687-693
DOI: 10.1051/dymat/2009097

Dynamic behaviour of laterally loaded pultruted composite beams

J.A. Epaarachchi¹ and P. Birt²

¹ Centre of Excellence in Engineered Fibre Composites (CEEFC) Faculty of Engineering and Surveying, University Southern Queensland, Toowoomba, QLD 4350, Australia
² Thru-Life Support Research Program Lead, Boeing Research and Technology Australia Brisbane, Queensland, Australia

Published online: 15 September 2009

Abstract
This paper discusses a detailed study carried out on vibration characteristics of transversely loaded pultruted composite beams. A considerable discrepancy was noticed in the measured vibration of the transversely loaded beam and the calculated natural frequencies of the beam using Euler-Bernoulli beam theory. It has been observed that the natural frequencies of the beam were increased after lateral loading. A simplified mathematical model was derived for the equation of motion in order to determine the vibration characteristics of the loaded beam. The discontinuities introduced at the loading points were modelled as a combination of translational and torsional springs. The predictions of the model have demonstrated that it has sufficiently captured the dynamic behaviour of a laterally loaded beam. A comparison of model prediction and the experimental results is presented.