- Thread starter ronan
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mike os
just a little insane.....
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Indeed
brightspark
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thought diamonds were the hardest material
bigegg
Scream Not Working Because Space Make Deaf
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#13
daleyd
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You’ve never bit into a hard bit in a bag of “Mr Porky” pork scratching then?thought diamonds were the hardest material
it dunt mention themthought diamonds were the hardest material
Barking Mat
Cuddler of hedgehogs.
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Our local bakery, has been sharing this cutting edge technology.
waldershelf
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These people have obviously never come across my mother in laws weapons grade pastry.
Gareth J
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The video of the"uncuttable material" makes it look very cuttable to me, dispite the ham fisted operator of the grinder.
You'd get a very similar effect (on cutting discs) by simply layering sheet steel. Try cutting a stack of galve tin that's free to vibrate.
You'd get a very similar effect (on cutting discs) by simply layering sheet steel. Try cutting a stack of galve tin that's free to vibrate.
Cobbler
Codger bodger
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Did she work in a pasty bakers, we were down in Cornwall years ago, bought a pasty & the crust was so tough even the seagulls couldn’t eat it. I’ve never known them refuse anything before or since.
daleyd
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Like ones we used to get delivered from Ivor Dewdney In Devonport - generally known as a Janners mouth organ or Dockyard tortoise
Reported in plenty of other places.
https://www.labroots.com/trending/c...-non-cuttable-material-modeled-mollusk-shells
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Back sometime ago I was involved with building security (cash in transit) non armoured vehicles. The bodies of larger trucks had a multi layer build, with various materials.
Whilst not totally attack resistant, it certainly made it difficult to cut with things like chainsaws, grinders etc..
Whilst not totally attack resistant, it certainly made it difficult to cut with things like chainsaws, grinders etc..
jerrytug
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Well of course it is. But I doubt the Daily Mail were the first to publish. There was a press release - then the papers jazz it up a bit!
Here is the original - some very well respected people involved in the research. Just because it is in the Daily Mail doesn't make it wrong - they are bound to get things almost right sometimes
https://www.nature.com/articles/s41598-020-65976-0
Interesting reading actually
here is an extract
The angle grinder attack represented the first highly localized load applied to penetrate our architected material. We used 115- and 125-mm diameter cutting discs with a sapphire finish to cut our panel samples (see Fig. 4 and Methods section 2 for disc descriptions). The angle grinder revolved at up to 180 revolutions per second, with rim velocity of up to 80 m/s. The angle grinder achieved only a partial incision and subsequently experienced high wear. Its external diameter reduced rapidly from 115 mm to 44 mm (Marcrist disc) and from 125 mm to 100 mm (Tyrolit disc) after 60–65 sec. At that point, the cutting discs became ineffective (Fig. 4b and Movie S1). Exact cutting attack times for the performed tests are tabulated in Methods, section 2. To compare our results with existing armor materials, we also tested one of the best currently available rolled-homogeneous armor (RHA) steels, distributed under MARS 220 trademark. The steel is quenched and tempered at temperatures below 200 °C to give it 440 Brinell hardness. The angle grinder completely penetrated the 10 mm MARS 220 plate in 45 sec (see Methods section 2 and Movie S2).
No complete penetration was achieved in any of our cutting tests. In the same time, excessive wear of the discs, (a,b) Marcrist and (c) Tyrolit occurred within one minute of the cutting attacks and rendered angle grinders ineffective.
here is an extract
The angle grinder attack represented the first highly localized load applied to penetrate our architected material. We used 115- and 125-mm diameter cutting discs with a sapphire finish to cut our panel samples (see Fig. 4 and Methods section 2 for disc descriptions). The angle grinder revolved at up to 180 revolutions per second, with rim velocity of up to 80 m/s. The angle grinder achieved only a partial incision and subsequently experienced high wear. Its external diameter reduced rapidly from 115 mm to 44 mm (Marcrist disc) and from 125 mm to 100 mm (Tyrolit disc) after 60–65 sec. At that point, the cutting discs became ineffective (Fig. 4b and Movie S1). Exact cutting attack times for the performed tests are tabulated in Methods, section 2. To compare our results with existing armor materials, we also tested one of the best currently available rolled-homogeneous armor (RHA) steels, distributed under MARS 220 trademark. The steel is quenched and tempered at temperatures below 200 °C to give it 440 Brinell hardness. The angle grinder completely penetrated the 10 mm MARS 220 plate in 45 sec (see Methods section 2 and Movie S2).
No complete penetration was achieved in any of our cutting tests. In the same time, excessive wear of the discs, (a,b) Marcrist and (c) Tyrolit occurred within one minute of the cutting attacks and rendered angle grinders ineffective.
