Browsing by Author "Friis, Eva"
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Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques
Moxnes, John Fredrik; Prytz, Anne K.; Frøyland, Øyvind; Klokkehaug, Siri; Skriudalen, Stian; Friis, Eva; Teland, Jan Arild; Dørum, Cato; Ødegårdstuen, Gard (2014)There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, ... -
Material properties of wolfram carbide established by using a simple indentation test
Moxnes, John F.; Nilssen, Jan R.; Frøyland, Øyvind; Friis, Eva (2003)In this article a study of the fracture stress caused by indentation of wolfram carbide penetrators into steel blocks has been carried out. Experimental data was compared with simulations using the Nike-2D code and with ... -
On the study of ricochet and penetration in sand, water and gelatin by spheres, 7.62 mm APM2, and 25?mm projectiles
Moxnes, John Fredrik; Frøyland, Øyvind; Skriudalen, Stian; Prytz, Anne K.; Teland, Jan Arild; Friis, Eva; Ødegårdstuen, Gard (2016)We examine the ricochet and penetration behavior in sand, water and gelatin by steel spheres, 7.62 mm APM2 and 25 mm projectiles. A threshold impact angle (critical angle) exists beyond which ricochet cannot occur. The ... -
Projected area and drag coefficient of high velocity irregular fragments that rotate or tumble
Moxnes, John Fredrik; Frøyland, Øyvind; Øye, Ivar Jarle; Brate, Tom I.; Friis, Eva; Ødegårdstuen, Gard; Risdal, Tallak Harald (2017)3 degrees of freedom (DOF) exterior ballistic computer models are used in fragment studies to calculate individual trajectories of each fragment based on drag coefficient and the projected (presented) area in the direction ...