Effects of the Gridding to Numerical Simulation of the Armour-Piercing Warhead Penetration through the Steel Target - Advances in Image and Graphics Technologies - page 352

Effects of the Gridding to Numerical Simulation
of the Armour-Piercing Warhead Penetration
through the Steel Target

Jun-qing Huang, Ya-long Fan Rui Ma, and Wei Shao

Department of Equipment Command and Administration, Academy of Armored Force
Engineering, Beijing, China
[e-mail]

Abstract. paper studies the influencing rule of gridding definition forcalculating
resultin numerical simulation of the armour-piercing warhead penetration
through the steel target, so we can get the reasonable scope of grid size. Paper has
used the adopted explicit dynamic analyzing program AUTODYN to simulate
the process of the armour-piercing penetration through the steel target. Based on
the simulation, we get the penetration deepness,penetration overload and damage
area of the target in conditions of different gridsize. In order to get more
reasonableresult, the scope ofgridsizeis equaled to about 5.0mm by
contradistinguishing and analyzing.

Keywords: Armour-piercing, penetration, numerical simulation and gridsize.

1 Introduction

With the rapid development of computer technology, the application of numerical
method becomes possiblyfor the simulation process of the armor-piercing warhead
penetration target [1] . As the base of numerical simulation, partition of grid sizehad direct
effect to numerical simulation result. For dynamic load, lots of elementswere added to
material model,such as the strain rate, so the dependenciesof grid is more important.
Sincethe effect of strain rate is lying on partition of grid size, dynamic strength also lies
on the partition of grid size. If a big grid size was defined, the numerical simulation
result would not be reasonable; and if small grid size was defined, the numerical
simulation result would be reasonable, but he numerical simulation process would need
much calculative time. For solving the problem of dependencieson grid in the numerical
calculation.thecommon way is averaging the grid and calculate coarse grid model and
subtle grid model respectively. If the numerical result was basically identical by
adopting two different partition gridding projects, it showed that the grid size could be
used to numerical calculation. In this essay, the explicit dynamic analyzing program
AUTODYN based on finite element was adopted to simulate the process of the
armor-piercing warhead penetration through the steel target which was defined by
different grid size, and the calculative result was analyzed in order to get reasonable size.