EVALUATION OF ENERGY ABSORPTION PERFORMANCE OF STEEL SQUARE PROFILES WITH CIRCULAR DISCONTINUITIES

This article details the experimental and numerical results on the energy absorption performance of square tubular profile with circular discontinuities drilled at lengthwise in the structure. A straight profile pattern was utilized to compare the absorption of energy between the ones with discontinuities under quasi-static loads. The collapse mode and energy absorption conditions were modified by circular holes. The holes were drilled symmetrically in two walls and located in three different positions along of profile length. The results showed a better performance on energy absorption for the circular discontinuities located in middle height. With respect to a profile without holes, a maximum increase of 7% in energy absorption capacity was obtained experimentally. Also, the numerical simulation confirmed that the implementation of circular discontinuities can reduce the peak load (Pmax) by 10%. A present analysis has been conducted to compare numerical results obtained by means of the finite element method with the experimental data captured by using the testing machine. Finally the discrete model of the tube with and without geometrical discontinuities presents very good agreements with the experimental results.

[1]  Jae-Eung Oh,et al.  EFFECT OF TRIGGERING ON THE ENERGY ABSORPTION CAPACITY OF AXIALLY COMPRESSED ALUMINUM TUBES , 1999 .

[2]  W. Altenhof,et al.  Experimental observations on the crush characteristics of AA6061 T4 and T6 structural square tubes with and without circular discontinuities , 2004 .

[3]  A. G. Mamalis,et al.  The effect of the implementation of circular holes as crush initiators to the crushing characteristics of mild steel square tubes: experimental and numerical simulation , 2009 .

[4]  Gerald Nurick,et al.  The Energy Absorption Characteristics of Square Mild Steel Tubes With Multiple Induced Circular Hole Discontinuities—Part I: Experiments , 2009 .

[5]  G. Nurick,et al.  The Energy-Absorbing Characteristics of Tubular Structures With Geometric and Material Modifications: An Overview , 2008 .

[6]  H. Badnava,et al.  Effects of buckling initiators on mechanical behavior of thin-walled square tubes subjected to oblique loading , 2012 .

[7]  W. Abramowicz,et al.  Dynamic axial crushing of square tubes , 1984 .

[8]  Norman Jones,et al.  Dynamic progressive buckling of circular and square tubes , 1986 .

[9]  G. Nurick,et al.  The Energy Absorption Characteristics of Square Mild Steel Tubes With Multiple Induced Circular Hole Discontinuities—Part II: Numerical Simulations , 2009 .

[10]  Mehdi Tajdari,et al.  Attempts to improve energy absorption characteristics of circular metal tubes subjected to axial loading , 2010 .

[11]  D. H. Laananen,et al.  A parametric study of crush initiators for a thin-walled tube , 2014, International Journal of Vehicle Design.

[12]  David P. Thambiratnam,et al.  A numerical study on the impact response and energy absorption of tapered thin-walled tubes , 2004 .

[13]  S. W. Surko.  Crushing strength of box columns with partially-damaged plating , 1991 .

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

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

[16]  Mahmoud Shakeri,et al.  Expansion of circular tubes by rigid tubes as impact energy absorbers: experimental and theoretical investigation , 2007 .

[17]  Jie Song,et al.  Light-weight thin-walled structures with patterned windows under axial crushing , 2013 .

[18]  Eduard Zaloshnja,et al.  Incidence and Total Lifetime Costs of Motor Vehicle–Related Fatal and Nonfatal Injury by Road User Type, United States, 2005 , 2010, Traffic injury prevention.

[19]  Gerald Nurick,et al.  THE ENERGY ABSORPTION CHARACTERISTICS OF DOUBLE-CELL TUBULAR PROFILES , 2008 .

[20]  F. M. Shuaeib,et al.  Energy absorption capacities of square tubular structures , 2007 .

[21]  Hoon Huh,et al.  Energy absorption of longitudinally grooved square tubes under axial compression , 2009 .