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This non-cuttable metal material sounds extremely useful: > "Security applications such as doors or barriers (as protection from forcible entry attacks) are ob
by mindfulhack 6y ago
This non-cuttable metal material sounds extremely useful:
> "Security applications such as doors or barriers (as protection from forcible entry attacks) are obvious ones. However, our material technology could also be useful for enhancing the cutting resistance of shoe soles or protective clothing. Workers could benefit from non-cuttable elbow pads or forearm guards in environments with industrial tools."
As someone who cares so much about digital security, physical security feels good.
- deleted 6y ago[deleted]
- db48x 6y agoThis material is completely unsuited for making shoe soles or elbow pads; it's a two-inch-thick plate of aluminum foam with half-inch ceramic spheres embedded in it. Around that they welded steel plates to give it a uniform surface. It'd make a very heavy but uncuttable door, but you can't make hinges or locks out of it. It would be a good material to make safes out of; those already have thick walls of composite materials designed to blunt drill bits.
- throwaway9d0291 6y agoI think that's a premature judgement. Is there any reason to think that it's impossible to scale it down? e.g. for PPE, 5mm ceramic spheres in a 1cm-thick Aluminimum foam with some 1mm steel plates on either side?
- db48x 6y agoYes, there is. They hypothesize that this material works because the ceramic spheres vibrate inside the flexible matrix of the aluminum foam, damaging the grinding wheel. A thinner foam will have less ability to flex, and smaller spheres will be have less momentum to use against the wheel. Plus, if you watch the video of them grinding the material (https://static-content.springer.com/esm/art%3A10.1038%2Fs41598-020-65976-0/MediaObjects/41598_2020_65976_MOESM1_ESM.mov https://static-content.springer.com/esm/art%3A10.1038%2Fs415...), you can see that the grinding wheel penetrates over half an inch before it begins to be destroyed.
- deleted 6y ago[deleted]
- dgoldstein0 6y agoFor comparison I was learning about medieval armor recently. Steel breastplates are about 2mm at their thickest, typically. So that's a rather heavy duty armor idea you have. Real question then is how it would fare against bullets and piercing attacks. Cutting is only one possible threat, and usually not the biggest threat. Knife resistant bullet proof vest are already a thing, so how would this be better?
- theelous3 6y agoIf you make a secure doorway with the hinges on the threat side, well, you're already toast. No need to make hinges out of anything special.
- rudolph9 6y agoI want a bike lock made of this stuff
- 8note 6y agoI'm sure lockpickinglawyer will still open it just fine.
- TwoBit 6y agoYeah but 99% of thieves can't do that. If they could then they'd likely have a real job. Lots of locks are invulnerable to the picking, especially serious digital ones.
- sudosysgen 6y agoThey just use a Ramset gun. Thieves are generally quite smart. The dumb ones tend to end up in prison, or worse.
- UnbugMe 6y agoI don't think you have a clue about intelligence based off that retard comment.
- chongli 6y agoI’ve watched a bunch of lockpickinglawyer videos and there are locks he cannot pick at all, and locks which take a hell of a lot of punishment from a Ramset gun. It’s not out of the realm of possibility that you could build a bike lock which would effectively deter thieves. After all, it doesn’t have to be indestructible, it just has to convince the thief that your bike is not worth the time and risk of attracting attention.
- toast0 6y agoRide something from the early 80s, before they went to neon colors.
- FuckButtons 6y agoSince it uses an aluminum matrix, abrasive cutting may not work, but plasma or gas cutting certainly will. A propane tank and a torch aren’t too difficult to get if someone knew they would need them.
- whoopdedo 6y ago"Digital security" is now how I will refer to safety boots and gloves.