I`m at point in my simulation where I have to make a check if bullet will penetrate armour or won`t. It is dependant on at least few factors - angle of impact, velocity of bullet, mass and size of bullet, and thickness / hardness of armour to penetrate. I`m especially interested in bouncing factor - which mostly is dependant on angle of the hit. But what values I should use? Like all bullets above 60 degrees will bounce off? If anyone would have any suggestions how to calculate this, I really would appreciate it!
I believe you're looking for this. You can look at the angle in the advanced options. http://www.wwiiequipment.com/pencalc/ Here's the contact info for the creator. http://www.wwiiequipment.com/index.php?option=com_contact&view=contact&id=2&Itemid=62
Yes, this is cool, also thanks! And I have also a question about FLAK ammunition - as to 88mm there was two kinds of it - HE and AP. Did HE version had shrapnel in it? Or it was only TNT? And if shrapnel was indeed inside, what was the force of impact of this shrapnel? Similar to 7mm round or rather 20mm round?
http://iaaforum.org/forum3/viewtopic.php?f=8&t=12470 By WW2 most cannon (the 88 included) used HE to fragment the shell into shrapnel rather than the older style containing circular bullets. Most shells that still used old style shrapnel bullets were straight up shotgun style canister shot. https://www.youtube.com/watch?v=Cgn1nhUEgo8
Damn Pacifist, impressive knowledge. Thank You. So, I will generate randomly shrapnel directing from centre of HE explosion. Should it have also random penetration capabilities due to size of shrapnel? And most important, what would be average armour penetration of those shrapnel? I only need approximate values, as I don`t believe I can make much more of physics accuracy. Or wait, shouldn`t shrapnel be throw more of in side and forward - as most of shell around is in this direction?
This will probably be of interest to you http://history.amedd.army.mil/booksdocs/wwii/woundblstcs/chapter10.htm
An HE shell fragment regardless of size is unlikely to penetrate more than 15mm. An HE shell that directly hits a tank is a different matter as the weight of the shell impacting and the point blank detonation of the HE can do considerable damage. As a guess I'd say the 88mm HE could penetrate approx 45 mm of armor at 90 degrees but that's just what feels right.
What feels right is most important, so thanks! I will use this approximation. Now, one more - after armour penetration bullet lose some of it force. Is it safe to count this force through penetration capabilities - i.e., if bullet penetrated 20mm of armour with 30mm penetration capabilities - it means it loosed 66% of its initial force? Or rather count it as there is still 10mm left to penetration capabilities? What is obvious - after penetration bullet has to have some force left to be able to do interior damage - so I wonder how to calculate this. For instance, engine and fuel tank probably will need still some of considerable force to be destroyed, but pilot or his cockpit not so much. I know there is a lot more to it, after bullet penetration probably it also loose some of it force just exiting armour, and maybe other things in it`s line, and also angle it is a lot of different thing, but all it is about approximation
Keep in mind that when an AP round penetrates armor, there is also a cone of debris (spalling) from the armor itself that is thrown around the interior. That debris and the round itself are white hot and will not only cause wounds/death to those inside the vehicle, but quite possibly start a fire.
KB, do not the currently popular penetrators, tungsten or depleted uranium , do just that. Rely on spalding to cause interior devastation ? I remember seeing T-55's knocked out when Serbia was fighting Croatia et al, when a quarter sized hole in the turrent was the only evidence of damage on the exterior. I read on the defense forums were modern MBT's have spall liners to help prevent that. For all the talk here about sloped armor a Leopard 2 has pretty upright armor as do many other MBT's. the change in weapons and armor has really been radical. (Sorry, bit off topic)
I didn`t thought about shrapnel from AP, this is good More I get into this subject, more interesting things come out. Up to today games are really simplified (mostly).
If you really want to get into the physics of it here's a good place to start (focus is large caliber naval rounds though): http://www.navweaps.com/index_nathan/index_nathan.htm
