Energy Absorption Performance of Staggered Triangular Honeycombs under In-Plane Crushing Loadings
Publication: Journal of Engineering Mechanics
Volume 139, Issue 2
Abstract
The finite-element methodology is presented to evaluate the energy absorption performance of staggered triangular honeycombs under in-plane crushing loadings at impact velocities of 50–300 m/s. The minimum dynamic cushioning coefficient is proposed to characterize the maximum energy absorption efficiency of staggered triangular honeycombs. When all configuration parameters are constant, the energy absorption per unit volume is proportional to the square of the impact velocity; for a given impact velocity, the energy absorption per unit volume is related to the ratio of the cell wall thickness to the edge length by a power law and to the expanding angle by complicated analytical equations. The maximum energy absorption efficiency is insensitive to the impact velocity. Only for the smaller ratio of the cell wall thickness to the edge length does the maximum energy absorption efficiency increase with the increasing expanding angle. At a given impact velocity there is a threshold ratio of the cell wall thickness to the edge length. The maximum energy absorption efficiency decreases abruptly when the ratio is larger than the threshold. The threshold ratio is approximately equal to 0.04.
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Acknowledgments
This work is supported by the 111 Project (B07050), the National Natural Science Foundation of China (10925212, 90916027), 973 Program (2011CB610304), the Natural Science Foundation of Shaanxi Province (2010JQ1011), the Natural Foundation of Education Department of Shaanxi (11JK0534), Initial Research Foundation of Shaanxi University of Science and Technology for Ph.D. (BJ12-15), and Initial Research Foundation of Xi’an University of Technology for Ph.D. (104-211004).
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Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 2 • February 2013
Pages: 153 - 166
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 15, 2011
Accepted: May 16, 2012
Published online: May 18, 2012
Published in print: Feb 1, 2013
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