Title: Dynamic behaviour and energy absorption of 1D and 2D regularly packed cells

Authors: T.X. Yu, G. Lu, Z.Y. Gao, D. Ruan

Addresses: Department of Mechanical Engineering, Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong. ' Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC. 3122, Australia. ' Department of Mechanical Engineering, Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong. ' Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC. 3122, Australia

Abstract: This paper summarises the studies of dynamic behaviour and energy absorption performance of the following regularly packed cell systems under axial (in 1D cases) or in-plane (in 2D cases) impact loading: 1D and 2D ring systems, a chain of type II cells, and a 2D honeycomb block. Under impact loading, these packed cells exhibit complicated dynamic behaviour, such as localisation and propagation of the deformation, the dependence of deformation mode on the impact velocity, significant effect of lateral inertia displayed by type II cells, and so on. It is revealed that the early response of these packed cells is dominated by the collision between the striker and the impinged end of the packed cells. Since the dynamic deformation mode of these regularly packed cells is notably affected by the impact velocity, while different deformation modes often lead to different energy absorption capacity and failure mechanisms, particular attention is paid to the determination of mode transition velocities.

Keywords: regularly packed cells; ring systems; type II cell chain; honeycombs; energy absorption capacity; dynamic deformation mode; mode transition; impact loading; impact velocity; lateral inertia; failure mechanisms; collision.

DOI: 10.1504/IJVD.2005.006657

International Journal of Vehicle Design, 2005 Vol.37 No.2/3, pp.199 - 223

Published online: 31 Mar 2005 *

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