Abstract
<p>Tubular thin-walled structures with different shapes of the cross-sections are widely used in various transportation systems as energy absorbing components to dissipate the kinetic energy during violent collisions and crashes. The aims of this paper are to obtain numerical data on the crashing of thin-walled structures made by multiple layers of steel sheets. A series of finite element calculations was carried out on four different models crashed axially in dynamic conditions by using LS_Dyna V971. The effect of the generated fold depth on the peak load and the mean crashing load of these types of structures were also examined. </p>
Highlights
Tubular thin-walled structures with different shapes of the cross-sections are widely used in various transportation systems [1] as energy absorbing components to dissipate the kinetic energy during violent collisions and crashes
The folds created due to impact deformation are in contact with each other, which determine by consequence the symmetrical inward and outward formation on opposite walls of these folds
Analyzing the presented data it was found that for steel thin-walled structures with rectangular cross-section, the specific energy absorption can be improved by adding multiple layers of material (Figure 10) such as the global inertia of the structure is being reduced to minimum
Summary
Tubular thin-walled structures with different shapes of the cross-sections are widely used in various transportation systems [1] as energy absorbing components to dissipate the kinetic energy during violent collisions and crashes. Various types of structures are utilized in the construction of controlled body crashing zones These elements have different cross-sections like circular, elliptical, square, top-hat, double-hat, polygonal shapes [3]. Regardless the cross-section shape, one of the most crashworthy parameter is the total energy that a given structure can absorb. It depends on many geometric and material parameters as on the folding modes that a great kinetic energy to be absorbed and dissipated properly [5]
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