Numerical investigation of energy absorption of conical grooved tubes under dynamic axial load

Subject Areas : Impact

Nima Asadi Dehmirahmadi ¹ , محمدجواد رضوانی ²

1 - Engineer
2 - استادیار ،گروه مهندسی مکانیک، ,واحد سمنان ، دانشگاه آزاد اسلامی، سمنان، ایران

Received: 2016-10-25 Accepted : 2016-12-21 Published : 2016-05-21

Keywords: Specific energy absorption, Crush force efficiency, energy absorbing bumpers, Total energy absorbed, average energy absorbed,

Abstract :

In this study, Numerical investigation of energy absorption of conical grooved tubes under dynamic axial load by LS DYNA was considered. In order to achieve axisymmetric collapse mode inner and outer grooves were created around the surface of conical tubes. The purpose of this study was consideration of the effects of number of grooves and grooves deeps on energy absorption and crush force efficiency. The results indicate that with the increase in number of grooves the collapse modes would not change. In addition to this, with the increase in number of grooves maximum crush load and collapse modes decrease but the force-displacement curves would be smoother