Improvement of energy absorption of impacted column due to transverse impact

Improving energy absorption of impacted column due to transverse impact: A finite element analysis

“…The effectiveness of transverse impact was found to be strongly dependent on the transverse impact time t T . These numerical results qualitatively agree with the existing experimental data [7].…”

“…The bar is 750 mm in length and its sectional area is 1260 mm 2 . Since it is difficult to replicate the conditions of the previous experiment [7], the elastic modulus and density of the axial impactor are taken as 0.20 GPa and 7850 kg/m 3 to roughly obtain the same history of axial impact load as measured in the experiment. Details of the geometric properties of each part are listed in Table 1.…”

“…The durations of transverse impact T were 0.1, 0.4 and 1.0 ms while the maximum value of transverse impact Q max was from 10 to 2000 N. The transverse impact time t T was from 0.05 to 8 ms. These values were selected based on previous experimental conditions [7]. Fig.…”

“…In previous studies, the authors investigated the effect of transverse impact on the buckling behavior of a column under static axial compression to control energy absorption [6] and experimentally demonstrated how to improve the energy absorption of an impacted column by applying transverse impact [7]. Column buckling generated by applying an axial impact and beam bending by applying a transverse impact have been reported in several studies [8][9][10].…”

“…During the axial impact, an impact load was applied transversely on the column to reduce its structural stiffness. The transverse impact load history Q(t) was approximated as a half-sine shape based on the experimental results [7]:…”