Experimental and numerical investigation of the effect of wall perforation geometry on absorption of axial impact energy in thin-walled metal tubes

Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Eyvanekey, Garmsar, Iran

Mechanical group, ihu university

Solid Mechanics Group, Mechanical Engineering Dept., Imam Hossein University, Tehran, Iran.

Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran

Solid Mechanics Group, Mechanical Engineering Dept., Imam Hossein University, Tehran, Iran.