DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 741 - 747
Section Industrial Applications
Published online 15 September 2009
DYMAT 2009 (2009) 741-747
DOI: 10.1051/dymat/2009104

Dynamic elastic buckling loads of slender rods and their dependence on geometrical features of specimens at intermediate impact velocities

K. Mimura1, T. Umeda1, I. Riku1, M. Yu2 and Y. Uchida2

1  Division of Mechanical Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ward, Sakai-city 599-8531, Japan
2  Students of Graduate School of Engineering, Osaka Prefecture University

Published online: 15 September 2009

In this research, dynamic buckling behaviors of column- and plate-type long aluminum rods were investigated both experimentally and numerically. In the experiments, a free fall drop-weight type impact testing machine was employed, and dynamic loads of up to buckling points were measured precisely by means of the load sensing block method. In the numerical analyses, dynamic FEM code ‘MSC-Dytran’ was used to simulate dynamic buckling behavior, and the validity and the accuracy of the simulation were checked through comparison with experimentally obtained load-time and displacement-time diagrams. The dynamic buckling loads at various impact velocities were, then, systematically investigated. From both experimental and simulated results, an effective empirical criterion for dynamic buckling of both types of rods was derived in terms of the impact velocity and the slenderness ratio. It was found that parameters in the equation to describe the dynamic buckling criterion for column- and plate- type rods take very close values, and this fact implies that the geometrical effect on dynamic buckling load ratio may be not so significant as far as the slenderness ratio is taken into account as a certain geometrical scale.

© EDP Sciences 2009