Journal of Failure Analysis and Prevention

, Volume 18, Issue 1, pp 174–182 | Cite as

Improved Energy Absorption Mechanism: Expansion of Circular Tubes by Rigid Tubes During the Axial Crushing

Technical Article---Peer-Reviewed
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Abstract

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.

Keywords

Energy absorption Circular tubes Lateral parts Finite element 

List of symbols

BM

Base model

MRVLB

Model reinforced by vertical lateral bars

MRHLR

Model reinforced by horizontal lateral rings

MRLBR

Model reinforced by lateral bars and rings

N.W

Normalized weight of deformable tube

\((E_{\text{tot}})\)

Amount of absorbed energy

\((F_{\hbox{max} })\)

Maximum load experienced during the axial crushing

a

Length of vertical lateral bar

b

Thickness of vertical lateral bar

θ

Revolution angle of vertical lateral bar

n

Number of vertical lateral bars

a

Length of horizontal lateral ring

b

Thickness of horizontal lateral ring

θ

Revolution angle of horizontal lateral ring

n

Number of horizontal lateral rings

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Copyright information

© ASM International 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringUniversity of TabrizTabrizIran
  2. 2.Department of Mechanical EngineeringAzarbaijan Shahid Madani UniversityTabrizIran

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