Vertical offset impact experiment and numerical simulation study on cutting-type energy absorbing structure
To comprehensively study the energy-absorbing performance of cutting-type energy-absorbing devices under vertical off-set loads,this study conducted full-scale vertical offset impact experiments and numerically simulated the collision process using LS-DYNA.Based on the verified finite element model,further exploration was performed to investigate the influence of vertical offset impact on the energy absorption process.The results indicated that the established finite element model accurately captured the cutting deformation pro-cess,showcasing close agreement between the projected collision responses and the experimental results.Under axial impact conditions,the cutting-type energy absorbing device exhibited a total energy absorption of 230.74 kJ,with an average force of 590.20 kN and a total compression of 387.02 mm.In contrast,under vertical offset impact conditions,the average force,total compression,and total energy ab-sorption of the structure decreased by 2.6％,1.8％,and 4.3％,respectively,when compared to axial impact conditions.The study reveals a deflection of the energy-absorbing tube by about 3° under the action of vertical offset impact,leading to a reduction in both the cutting depth and compression of the tool during the energy-absorption process.This adaption sheds light on the effect of vertical offset impact conditions on energy absorption performance.
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维普
