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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

#211

Post by FuckButtons »

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…

Since 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.

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

#213

Post by lordlimecat »

stubish wrote: post #127
steffan wrote: post #11

My first thought was "New bike lock material" My second was: "New non-cuttable bike lock defeated by ______" {freezing, shock, heat, _ }

acid to disolve the aluminium in the structure

If you wanted to go the chemical route, galium would do it.

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

#214

Post by snarfy »

teruakohatu wrote: post #21

This could be a revolution in bike locks. Right now compact battery powered cutting tools can remove just about any bike lock quickly and can easily be concealed.

I wonder how well it handles cold.

I remember hearing about thieves spraying down those u-lock style locks with refrigerant, then tapping them with a hammer. They would shatter like glass.

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

#215

Post by Jedd »

cainxinth wrote: post #210
Jedd wrote: post #44

> The freefall of grapefruit from 10 m does not damage the pulp[1] because pomelo peel consists of vascular bundles and an open-pored cellular structure with the struts made of parenchymatic cells. I have a Marsh grapefruit tree, fruiting now (southern hemisphere) as it happens, and I note that it produces particularly pithy progeny. (Ignoring for the moment that Pomelo is one of the parents of the modern grapefruit.…

"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 of this plant'.

The question still stands - why is this adaptation useful, given it's probably expensive. (That assumption of mine may be entirely wrong.)

Early species would have been shorter, and all species in the history of this would have fruited long before the individual trees reached 10 metres (I'm guessing even in ideal conditions that implies 10+ years growth). Most would-be consumers of the fruit would be able to reach fruit within the first metre or so (if unable to climb or fly) and anywhere in the tree otherwise.

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

#216

Post by SV_BubbleTime »

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.

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

#217

Post by ajuc »

adrianN wrote: post #178
ajuc wrote: post #176

Earlier quoted context omitted.

They are very much a problem still, I've punctured a tire recently (the expansive puncture-resistant one). That's after several punctures last year (but that was on a regular old tires, that's why I switched). Before you ask - it's not a problem with the wheel or anything, I've had it checked. I've never had a flat tire in the countryside trips, though. It's always on broken glass some jerks throw at bike lanes in bi…

I dug several mm long glass shards out of my Schwalbe Marathon+ without them penetrating to the tube, but if you want solid rubber, you can buy it: https://tannus.com/tires/

Thanks, this sounds great. But 2 tires cost more than my whole bike :/ Not that I can't afford it, it just feels wrong somehow :)

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

#219

Post by SV_BubbleTime »

IshKebab wrote: post #199
joe-collins wrote: post #100

I feel like it says a lot about the HN audience that the biggest reply chain is about bike locks, of all things.

Why? Bike locks are surely the most common thing people have experience of being cut that they don't want to be cut.

Did anyone actually read the article? The aluminum foam material has to be thick and the ceramic beads are large.

Also, even if you just looked at the angle grinder video, you can see the claims aren’t really as presented. It’s very cutable, it just happens to eventually dull the cutter eventually. That’s what, a 2” billet they have there?

For their demo on a similar thickness steel plate, I think that most people would have an extremely hard time getting that far in 17-4PH steel let alone SS6xx like Inconel or any one of 100 different steels.

Mostly you would stop from boredom even in a world where the grinder wasn’t similarly full or broken by the time you gave up.

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

#220

Post by ufmace »

8note wrote: post #93
rudolph9 wrote: post #70

Earlier quoted context omitted.

I want a bike lock made of this stuff

I'm sure lockpickinglawyer will still open it just fine.

I am highly entertained by this, because I just happened to find his videos a few weeks ago and have been watching a ton of them.
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