Inclusion of Tapered Tubes in Enhancing the Crash Performance of Automotive Frontal Structures

This paper treats the design and analysis of an energy absorbing system. Experimental tests were conducted on a prototype, and these tests were used to validate a finite element model of the system. The model was then used to analyze the response of the system under dynamic impact loading. The response was compared with that of a similar system consisting of straight circular tubes, empty and foam-filled conical tubes. Three types of such supplementary devices were included in the energy absorbing system to examine the crush behavior and energy absorption capacity when subjected to axial and oblique impact loadings. The findings were used to develop design guidelines and recommendations for the implementation of tapered tubes in energy absorbing systems. To this end, the system was conceptual in form such that it could be adopted for a variety of applications. Nevertheless, for convenience, the approach in this study is to treat the system as a demonstrator car bumper system used to absorb impact energy during minor frontal collisions.

[1]  O. Hopperstad,et al.  Static and dynamic crushing of square aluminium extrusions with aluminium foam filler , 2000 .

[2]  W. Abramowicz,et al.  Thin-walled structures as impact energy absorbers , 2003 .

[3]  A. Otubushin,et al.  Detailed validation of a non-linear finite element code using dynamic axial crushing of a square tube , 1998 .

[4]  T. Wierzbicki,et al.  Experimental and numerical studies of foam-filled sections , 2000 .

[5]  Magnus Langseth,et al.  Modelling of tubes subjected to axial crushing , 2010 .

[6]  B. J. Clark,et al.  Enhancing the impact energy absorption in roll over protective structures , 2008 .

[7]  David P. Thambiratnam,et al.  Dynamic computer simulation and energy absorption of foam-filled conical tubes under axial impact loading , 2009 .

[8]  Hsuan-Teh Hu,et al.  Axial compression and energy absorption characteristics of high-strength thin-walled cylinders under impact load , 2010 .

[9]  Odd Sture Hopperstad,et al.  Crash behaviour of thin-walled aluminium members , 1998 .

[10]  Eric Markiewicz,et al.  An inverse approach to determine the constitutive model parameters from axial crushing of thin-walled square tubes , 1998 .

[11]  David P. Thambiratnam,et al.  Dynamic energy absorption characteristics of foam-filled conical tubes under oblique impact loading , 2010 .

[12]  David P. Thambiratnam,et al.  Dynamic simulation and energy absorption of tapered tubes under impact loading , 2004 .

[13]  S. Reid,et al.  Static and dynamic axial crushing of foam-filled sheet metal tubes , 1986 .

[14]  David P. Thambiratnam,et al.  Application of foam-filled conical tubes in enhancing the crashworthiness performance of vehicle protective structures , 2009 .