>>28560437 >AR550 stops a .50 AP-I Wow, and the Apollo Program went to the Moon.
You're not gonna wear a carrier loaded with fucking 550, unless you enjoy pulverizing your vertebrate and wishing you got shot instead of suffering until you die because you're crippled from the neck down.
>>28560611 Standard 12 gauge of any kind will not fuck you up when it's stopped by armor. Doesn't matter what kind of barrel it's fired from. The force is spread over a large area and there are backforce deformation limits for NIJ certified armor.
>>28560708 Soft armor would have been a much better example if that's what you were trying to prove. If that mannequin was you, you'd probably suffer several cracked/broken ribs, but you would not die from the impact, given you aren't flayed by spalling.
Not as a standalone material - just not happening.
However, mixing CNT into aramid fibers has been proven to work well. It basically triples the strength. However, soft armor, even with CNT, still doesn't stop rifle rounds. CNT improves multi-hit in hard armor, but armor doesn't stop people from being suppressed because it's not full-body protection.
>>28560655 >AR550 >You're not gonna wear a carrier loaded with fucking 550, unless you enjoy pulverizing your vertebrate and wishing you got shot instead of suffering until you die because you're crippled from the neck down.
The number after the AR is the steel's Brinnell Hardness, not a statement of thickness. AR 550 is likely to become the next big thing in armor because it pushes the protection to the point that 5.56 M995 can not piercing it IF it is fired out of a 14.5 inch barrel.
>>28560576 No guns doesn't understand basic physics The force is spread out over a longer time as well as over a larger area, imparting less pressure on you from the recoil versus all of the bullets kinetic energy slamming your chest almost instantly
>>28563128 not him but force is the change in momentum (for constant mass systems), therefore conservation of force according to newtons laws is conservation of momentum. this isnt the same as saying energy is conserved
>>28559834 Can I ask a stupid question, /k/? Why do we continue to labor away making materials strong enough to resist bullets when the force will kill you anyhow?
I had an idea when I was about 7-8 years old for vacuum-layered armor. You have the frontal plate, which stops the bullet. Then there's a vacuum between the back plate. Force is transmitted across that vacuum by short steel columns to the other side of the vest, which have material that can break off.
Bullet hits armor, bullet stops, force is translated through into sacrificial plates on the other side which break off, without transferring any actual force to the body in the middle.
You could maybe go Halo style and do a gel layer type thing between the plates and the wearer as well to absorb anything else, and have a rugged frame going from the strike face to the shoulder and kidney aeas to transfer the force to the plates you mentioned. If that makes any sense.>28565090
>>28565150 Yeah, that's the plan, although you definitely want a vacuum, not a gel. Shockwaves can't translate through vacuum. That way, you can have a (reasonably) comfortable body-fitting layer to wear that the armor can affix to.
It'd be almost like a reverse spacesuit. Vacuum inside, atmosphere outside.
Took physics in high school and passed with a C about 6 years ago, and what the actual fuck are you guys talking about?
The rifle has a longer impulse of energy transfer (energy over time) and it weighs something like 1500x more than the bullet itself, so the same energy is imparted over a longer period of time, into a wider surface area of the shooter, with a drastically lower velocity.
>>28559834 Not before it see commercial use in electronics. The biggest hurdles for graphene is growing a perfect tubes and perfect sheets. Until that happens it can only, theoretically, be made into batteries.
>>28559834 It is more likely to be used as high density capacitor/battery for electronics. Being able to lug around electronics without lugging around multiple sets of batteries will be highly advantageous.
>>28559834 I dont really know any technical info, but I am a practical man.
Whenever somebody starts saying "this thing makes your clothes cleaner, your teeth whiter, and your smile brighter! Thats right folks, it is water, fire, laser, earthquake, aids, and bullet proof too! Use it to charge your phone or do your taxes! Step right up folks! With just a bit more funding we are going to utterly transform every aspect of your life over night just as soon as you toss a few million in funding into the mix!"
I assume its being exagerrated to gain funding. Or, atleast, that such uses are pure hypothesis or theory at this point and they are just kinda, guessing that it can do these things at this point.
Not saying research is pointless, just saying graphene is pretty early in its stage of development to really be making a lot of the claims that they are.
>>28560193 What concussion? Ever heard of Newtons third law? If a .50 cal round would cause a lethal concussion on the target it would have to have the same effect on the shooter, because force = counterforce. But the recoil doesn't kill people. And the kinetic energy of the bullet alone doesn't either. It's the penetration that is a function of its sectional density that kills. A bullet that doesn't manage to penetrate a bulletproof vest may cause a bruise, in the worst case even a broken rib, but not a lethal concussion.
Bullets also don't cause a man to fall. They lack the kinetic energy to do so. That's a purely psychological reaction. Witness forensic ballistics expert Alex Jason getting shot with 7.62 x 51 NATO while standing on one leg and barely moving:https://www.youtube.com/watch?v=aaS_2l8nGdg
>>28568582 ya but that force is distributed across the time it takes to travel through that 28+ inch barrel for the shooter, and dampened by the muzzle break. in the vest it has to only a inch or so to stop. I imagine it would be like getting hit with a sledge in the chest, still able to break ribs puncture lungs with said ribs etc. I'm no doc but I'm pretty sure your still dead
>>28568646 Yes, that's true. But it's more than an inch stopping distance, as the human body is mostly soft and able to deform, depending on where exactly the bullet hits. It also matters how large the area is over which the force attacks. That depends on how rigid the vest is. A hard plate can distribute it over the whole chest.
>>28559834 I just heard about this stuff in my materials acience class A sheet 1 atom thick, used as a hammock, can hold a very fat cat without breaking. Imagine what a half inch sheet of this stuff could do
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