Volume 2, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||1643 - 1648|
|Published online||15 September 2009|
Numerical analysis of the projectile deformation during the penetration of concrete targetsW. Zhang, Z.-C. Mu, Z.-S. Cao and X.-K. Xiao
Hypervelocity Impact Research Center, Harbin Institute of Technology, PO Box 3020, Science Park, No. 2 Yikuang Street, Harbin 150080, P.R. China
Published online: 15 September 2009
The deformation of projectiles with different head shapes and length-diameter ratios (L1/D), in a wide impact velocity range is investigated through a series of numerical simulations, where high strength concrete (92 MPa) targets, ogival and flat nosed projectiles are involved. In order to investigate the effect of the head shape and L1/D on the projectile deformation, 16 projectile geometry configurations are used. It is found that the deformation can be categorized as: “Taylor deformation”, where the projectile head gradually becomes blunt and the diameter in the front part of the projectile gradually becomes large; “head rupture”, which occurs when the impact velocity reaches a critical velocity; and when the impact velocity is further increased beyond velocity range inducing rupture, the projectile head becomes mushroom-shaped. These three types of deformation are relative to the impact velocity, L1/D and the head shape. Further more it is concluded that in the low velocity range the acceleration history of the projectile is stable while in the high velocity range it gives birth to a peak rather than keeping a constant. The phenomena become more and more evident with the increasing velocity.
© EDP Sciences 2009