41–50 of 162 posts
>The researchers have filed for two patents on the process they used to generate the material, which they describe in a paper appearing today in Nature. MIT postdoc Yuwen Zeng is the lead author of the study. Anyone think they could find the patent that were filed? Or is it only once they're approved that you can see them?
Too bad the article does not actually say what the material is made out of. Does this beat UHWMPE? Because UHMWPE is already damn strung stuff for its weight. But the big downside being that because it is so damn dense it cannot be thermoformed (the big plus being that it also has a huge range of temperature resistance) edit: Correction, it looks like they call it "polyaramide" which sounds like it is similar to Aram…
> and can be easily manufactured in large quantities That seems promising. I have a couple of concerns - Can it be recycled? - How are new materials like this tested for toxicity?
Can't wait for 3D printed parts made out of this stuff. > the new material’s elastic modulus — a measure of how much force it takes to deform a material — is between four and six times greater than that of bulletproof glass. They also found that its yield strength, or how much force it takes to break the material, is twice that of steel, even though the material has only about one-sixth the density of steel. That's g…
Earlier quoted context omitted.
> a couple of concerns - Can it be recycled? Right. We have enough issues with plastic waste, without it having extra-ordinary strength.
Also steel is 100% recyclable. If I recall correctly, most steel used today is recycled.
Can't wait for 3D printed parts made out of this stuff. > the new material’s elastic modulus — a measure of how much force it takes to deform a material — is between four and six times greater than that of bulletproof glass. They also found that its yield strength, or how much force it takes to break the material, is twice that of steel, even though the material has only about one-sixth the density of steel. That's g…
Earlier quoted context omitted.
It's hard to say without reading the paper itself, but in general one should be skeptical of claims that such-and-such material is stronger than steel. The properties that make steel interesting are not its elastic modulus or yield strength. This material is probably closer to graphite (which beats steel in elastic modulus and yeild strength) than something you would actually want to use in a structural application.…
I'm curious, in that case what properties do make steel interesting?
Also, the high modulus is interesting. Some components are stiffness limited such that you couldn't use aluminum or titanium even if you wanted.
For instance, oh, nylon fiber is stronger than some steels, and way less dense:
https://en.wikipedia.org/wiki/Ultimate_tensile_strength#Typi...
One kind of steel, "ASTM steel" comes in at 400-500 MPa; nylon fibers at 900.
Check out the Bamboo entry in the table. Human hair is also impressive.
Can't wait for 3D printed parts made out of this stuff. > the new material’s elastic modulus — a measure of how much force it takes to deform a material — is between four and six times greater than that of bulletproof glass. They also found that its yield strength, or how much force it takes to break the material, is twice that of steel, even though the material has only about one-sixth the density of steel. That's g…
Can't wait for 3D printed parts made out of this stuff. > the new material’s elastic modulus — a measure of how much force it takes to deform a material — is between four and six times greater than that of bulletproof glass. They also found that its yield strength, or how much force it takes to break the material, is twice that of steel, even though the material has only about one-sixth the density of steel. That's g…
It always amazes me at how many people don't really understand how buoyancy works.