The quasi-static piercing of square tubes

摘要

This paper investigates the energy absorption properties of square tubes pierced by pointed punches under quasi-static conditions. In a series of tests, pyramidal punches of square section and conically headed cylindrical punches were pierced slowly into square steel tubes having 40X40mm outside dimensions. Wall thicknesses 1.6 and 2.5mm were tested, and the length of tubes was varied. Some typical loads were plotted against deflection, and a number of interesting conclusions were drawn from the test.