Dynamic Crushing of Strain-Softening Cellular Structures—A One-Dimensional Analysis

[+] Author and Article Information
V. P. W. Shim

Department of Mechanical and Production Engineering, National University of Singapore, Singapore 0511

B. Y. Tay

Chartered Industries of Singapore, Singapore 2261

W. J. Stronge

Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK

J. Eng. Mater. Technol 112(4), 398-405 (Oct 01, 1990) (8 pages) doi:10.1115/1.2903349 History: Received November 29, 1988; Revised May 16, 1989; Online April 29, 2008


A one-dimensional model for impact deformation of open-celled structures is used to examine the effects of material elasticity, cell inertia, cell compliance characteristics and limited crushability. Analyses show that these parameters govern the development, distribution and severity of crushing in periodic, open-celled structures where individual cells strain-soften; coupled with impact velocity, they dictate the deceleration imparted to a colliding body. Comparisons with experiments on the impact crushing of metal tube arrays and rigid polyurethane foam yield reasonable qualitative correlation. A conclusion is drawn on the desired nature of cellular systems for efficient impact dissipation.

Copyright © 1990 by The American Society of Mechanical Engineers
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