In this paper, it is shown that some classic longitudinal impact problems can be solved satisfactorily with time delayed systems. As an example, a sphere colliding with a fixed rod with finite length is discussed in detail. Since it takes a finite time for a wave propagating from one position to another position, the longitudinal impact wave is naturally modeled by a time delay system. Numerical simulation shows some interesting phenomena and experimental results have validated the model with time delay. It is shown that for the computation of Poisson’s coefficient of restitution in multibody dynamics, the decomposition of the contact into the compression phase and the expansion phase must either be specified by whether the contact force increases or decrease or by whether the relative displacement increases or decreases. In the first case, the coefficient of restitution determined from the time history of the contact force could be greater than one. In the other case, the duration of contact determined from the relative displacement of the colliding bodies may be wrong as discussed in the paper.
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September 2004
Technical Briefs
Simulation of Longitudinal Impact Waves Using Time Delayed Systems
Bin Hu and
,
Bin Hu and
Institute B of Mechanics, University of Stuttgart, Pfaffenwaldring 9, D-70550 Stuttgart, Germany
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Peter Eberhard
Peter Eberhard
Institute B of Mechanics, University of Stuttgart, Pfaffenwaldring 9, D-70550 Stuttgart, Germany
Search for other works by this author on:
Bin Hu and
Institute B of Mechanics, University of Stuttgart, Pfaffenwaldring 9, D-70550 Stuttgart, Germany
Peter Eberhard
Institute B of Mechanics, University of Stuttgart, Pfaffenwaldring 9, D-70550 Stuttgart, Germany
Contributed by the Dynamic Systems, Measurement, and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division September 17, 2003. Associate Editor: N. Olgac.
J. Dyn. Sys., Meas., Control. Sep 2004, 126(3): 644-649 (6 pages)
Published Online: December 3, 2004
Article history
Received:
September 17, 2003
Online:
December 3, 2004
Citation
Hu and , B., and Eberhard , P. (December 3, 2004). "Simulation of Longitudinal Impact Waves Using Time Delayed Systems ." ASME. J. Dyn. Sys., Meas., Control. September 2004; 126(3): 644–649. https://doi.org/10.1115/1.1789539
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