Shock Loading on the Liquid Nitrogen Pressure Vessel

Abstract

Recently, a demand for cryogenic fluids as a coolant has increased because of the industrial development of low temperature technology. Therefore, the use of cryogenic pressure vessels becomes general. LNG-tank, LN2 , LO2 -tank at food factories and medical facilities are given for example. The shock tolerance of various materials at the cryogenic temperature region that occur in these pressure vessels is necessary to consider their safety. The fact that some materials become fragile at low temperature has already been known. Properties of material in the temperature area of −200°C and below are not widely known. Therefore, we carried out experiments in which test pipes were exposed to shock wave loading at cryogenic temperatures, and investigated the fracture of test pipe and its fragments. Hardening was observed in the surface of the shocked test piece, and the hardening was influenced by deformation. In order to investigate the effect of only a shock loading, we experimented using flyer plate.Copyright © 2004 by ASME