Numerical Simulations of Dynamic Instability of Elastic-Plastic Beams
Publication: Journal of Engineering Mechanics
Volume 132, Issue 3
Abstract
This paper numerically investigates the dynamic instability of different elastic-plastic beams subjected to transverse pulse load. Two types of beam dynamic instability, i.e., symmetrical and asymmetrical instabilities, are studied. The unstable responses of the elastic-plastic beams are illustrated by investigating the modal participation factors of the lowest nine vibration modes, which are determined by inverse derivation of the numerically simulated beam deflection response. The critical pulse loads for the beam symmetrical and asymmetrical instabilities are obtained with respect to different load durations. Characteristic diagrams for beams with different boundary conditions and subjected to different type pulse loads are given. The present study conforms that not only axial compressive load induces instability of slender members, but also transverse pulse load results in instability of elastic-plastic beams.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 132 • Issue 3 • March 2006
Pages: 260 - 267
Copyright
© ASCE.
History
Received: Jan 26, 2004
Accepted: Jul 6, 2005
Published online: Mar 1, 2006
Published in print: Mar 2006
Notes
Note. Associate Editor: Nicos Makris
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