COLLAPSE BEHAVIOR OF DYNAMICALLY CRASHED HEXAGONAL THIN WALLED STRUCTURES WITH MULTI-CELL CROSS-SECTION GEOMETRY

VLAD ANDREI CIUBOTARIU

Abstract

In previous studies, the cross-section geometries were either single cell (circular, prismatic) or multi-cell structures with identical cell properties. In the present research the collapse characterization of multi-cell structures consisting of three different types of cell formation defined by either two wide or two narrow angles separating the ladders is conducted. The shape characteristics of interest sum up the layout of the interior walls and their constraints over the outer structure walls. To study the control of cross-section geometry over the crashing mechanism, local or global progressive buckling response, energy absorption and crash load for the structures in discussion FEA simulations of the impact were performed.

Keywords

crashworthiness, specific energy absorption, axial crashing, thin-walled structure, crashworthiness

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