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Proteus Technology: New Material Is Strong, Light and Non-Cuttable

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Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#221

Post by egypturnash »

mattigames wrote: post #40
sudosysgen wrote: post #27

Earlier quoted context omitted.

This is an absolutely amazing innovation, but bike thieves have already progressed to using powder-actuated pistons in order to break the internal mechanism of a lock. Much faster and easier than cutting anything.

Locks should have a layer of explosive material inside, so firing the powder-actuated tool (PAT) may ignite the explosives and destroy the PAT itself, and it would help too by making some very strong noise so people may hear something is going on.

You can do whatever you want with your bike but I sure am not carrying something designed to be activated by a strong jolt on my bike when I bike through decaying city streets full of potholes and bumps and other fun stuff like that.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#222

Post by catalogia »

kbenson wrote: post #116
sk5t wrote: post #112

Earlier quoted context omitted.

It does both!

My point is that if you look at that definition of "cut", it's not just rendering one item into two pieces, other wise tearing or cracking something would be cutting it, and those aren't cutting either. I doubt this material is impervious to shear force, or being lowered in temperature until it's brittle and cracked. But those aren't methods of cutting .

I mean, this material is only resistant to drilling and grinding. Saying you "cut" something with an angle grinder is a fair use of the term, yet grinding away at something probably isn't the first thought people have when you just say "cut". I'd say the truest form of cutting is shearing, as with shears.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#223

Post by whoopdedo »

mindfulhack wrote: post #7

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…

"Digital security" is now how I will refer to safety boots and gloves.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#224

Post by jeffreyrogers »

SV_BubbleTime wrote: post #216
exabrial wrote: post #197

One may need to use an angle grinder correctly in a video to convince me. The demo where they plunge the angle grinder straight into the material is no different than the effect on hardened steel. Typically you would start at an edge to minimize the contact area of the cut. That's why lock shackles are rounded.

Yea. I can absolutely guarantee they wouldn’t get nearly as far as they did with a really hard steel like 600-series stainless (Inconel). I’m certain this is a novel approach with their “jelly filled with nuggets” but it’s still jelly... let me know when they embed nugget in steel.

I think they are cutting into the steel plate that they welded to it. Doesn't look like they get that far into the actual material. I agree with the point about using the grinder correctly though.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#225

Post by Roritharr »

hwillis wrote: post #194
Jedd wrote: post #154

Earlier quoted context omitted.

Goodness, that is interesting. It's not clear why this matters from the paper, in that it sounds like (but not spelled out) that they are perhaps trying to refrigerate fruit for transport, where the transport itself is not actively refrigerated, merely insulated, so the reduction to target temperature has to occur before shipping. However this was published in 1970, and I'd assume in that part of the world refrigerat…

(absorbed by osmosis during my time at Zest, a JIT produce handling company) Harvest time is extremely hectic. There's a very small window to get months worth of produce picked, sorted, cooled, packed and shipped. Cooling is a major bottleneck, because capital for refrigeration is not unlimited. Likewise any delay can be a major issue- if a truck is slow to load, how do you know whether or not you need to re-cool you…

And here am I the doofus who works in Accounting Software often saying "I should have done something with fruit" when my work involves too much math for my liking.

I'll try to stop using that from now on, thanks!

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#226

Post by cmrdporcupine »

Jedd wrote: post #215
cainxinth wrote: post #210

Earlier quoted context omitted.

"I'm now consumed with curiosity why this plant has evolved to have this feature." Grapefruit didn't evolve naturally. In fact, it's only a couple of hundred years old. It's the way it is because of human intervention.

Absolutely. I also have a pomelo tree, though it's still in a pot in the shadehouse, and produces a single (enormous) fruit each year. Grapefruit are a cross, probably, of pomelo and a sweet orange - as you say, not all that long ago. While some grapefruit varieties are quite pithy, pomelos (that I've seen) are very pithy - hence the 'this can only have been even more expensive a protective layer in earlier versions…

Interesting. There are other fruit & seeds out there that develop strong exocarp or mesocarp (think coconut) and I believe it has to do with wanting the fruit to travel longer distances to encourage geographic spread. The plant probably "prefers" that the seedlings take hold some distance from the parent, so wants the seed preserved longer and taken away by certain kinds of animals (hairless apes!)

What kind of animals live, or lived, in wild citrus' native range? Now I'm curious. [EDIT: Himalayan foothills... Macaques? Elephants?]

Or it's selected for particular animals as spreaders? In wild grapes, for example, most are adapted for bird spread (small dark acidic berry, high up in a tree on dangling shoots) but there are a handful of species (vitis labrusca "fox grape" for example, and vitis rotundifolia aka muscadines) that have adapted for mammals and they are quite different: larger berry, lighter colours, strong smell (think Concord), lower acids, slip skin, and a tendency to "shell" (fall off the vine when ripe). They also tend to grow wild in shadier moister areas, e.g. the underbrush where foxes and skunks and racoons etc. will grab them, not birds.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#227

Post by SV_BubbleTime »

jeffreyrogers wrote: post #224
SV_BubbleTime wrote: post #216

Earlier quoted context omitted.

Yea. I can absolutely guarantee they wouldn’t get nearly as far as they did with a really hard steel like 600-series stainless (Inconel). I’m certain this is a novel approach with their “jelly filled with nuggets” but it’s still jelly... let me know when they embed nugget in steel.

I think they are cutting into the steel plate that they welded to it. Doesn't look like they get that far into the actual material. I agree with the point about using the grinder correctly though.

You do not (cannot) weld steel to aluminum.

This looks like aluminum billet to me. And other than the grinder stopping, it looks like it’s cutting exactly like aluminum.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#228

Post by adrianmonk »

Cthulhu_ wrote: post #162
adrianmonk wrote: post #126

Earlier quoted context omitted.

Forget locks... just make my tires out of this.

Why would you want aluminium foam tires?

Very good point. It's not an entirely serious suggestion. I just want tires made out of something indestructible.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#229

Post by jeffreyrogers »

SV_BubbleTime wrote: post #227
jeffreyrogers wrote: post #224

Earlier quoted context omitted.

I think they are cutting into the steel plate that they welded to it. Doesn't look like they get that far into the actual material. I agree with the point about using the grinder correctly though.

You do not (cannot) weld steel to aluminum. This looks like aluminum billet to me. And other than the grinder stopping, it looks like it’s cutting exactly like aluminum.

Sure, it doesn't really matter if it is steel or aluminum. They are cutting into the plate that is welded to the material. It still appears to stop once it gets through the plate.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#230

Post by kbenson »

Brian_K_White wrote: post #202
kbenson wrote: post #116

Earlier quoted context omitted.

My point is that if you look at that definition of "cut", it's not just rendering one item into two pieces, other wise tearing or cracking something would be cutting it, and those aren't cutting either. I doubt this material is impervious to shear force, or being lowered in temperature until it's brittle and cracked. But those aren't methods of cutting .

I don't see the distinction. Everything but shears removes material at the cut. A plasma cut is no different in that respect from a saw, grinder, water-jet, laser, torch.

Cutting something with scissors, or in the case of thicker metal a press with a bit, doesn't remove material. Tearing something in two doesn't remove material. But you're right, any sawing type cut, as with a grinder, does remove material.

What I was really getting at though is that if you look at the definition of "cut" you'll see in most (all?) sources it defines it has being achieved through a sharp object or tool. I understand that's not often how it's used colloquially though.

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