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Abstract
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This study suggests three methods of enhancing
energy dissipation capacity by means of the expansion of
deformable tubes by a rigid tube in case of axial crushing.
In this mechanism of energy dissipation, a rigid tube is
being press-fitted into a deformable tube during the axial
crushing. This mechanism dissipates energy through the
circumferential expansions of the deformable tube and
friction force between tubes. In this regard, three different
methods have been studied in aid of improving the energy
absorption capacity of the absorber systems in addition to
economizing on the manufacturing cost. The methods
include reinforcing the tubes by attaching horizontal and
vertical lateral parts as well as using a combination of
them. Finite element solution was adopted to simulate
models’ deformation and energy absorption capacity. As a
result, it was found out that the tubes reinforced by a
combination of horizontal and vertical lateral parts indicate
higher energy dissipation capacities in addition to lower
production costs.
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