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DanielleFong's profile
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@DanielleFong

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@DanielleFong

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Empire of the Future
Joined February 2008

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    1.  🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
      Replying to @mchapiro @LauraDeming

      yes, the bonds off plane aren’t strong. optimizing this is critical to achieving good tensile strength even in your other example, carbon fiber, There’s a vast differences and the tensile strength and modulus depending on how you make it

      1 reply 0 retweets 0 likes
    2. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @DanielleFong @LauraDeming

      Michael Chapiro, Esq., GMI, GFY Retweeted Michael Chapiro, Esq., GMI, GFY

      I pointed to a pitch fiber, but PAN has higher transverse tensile strength (both far less than along length). You wouldn't gain anything though since the diameters are below critical length at current strengths and won't tear. But back to original prompt:https://mobile.twitter.com/mchapiro/status/1277063044133203969 …

      Michael Chapiro, Esq., GMI, GFY added,

      Michael Chapiro, Esq., GMI, GFY @mchapiro
      Replying to @LauraDeming
      No. I interpret equivalently useful to mean broadly useful class of materials where a lot of variations are available at a low cost. We will find broadly useful materials and cheap materials going forward, but both simultaneously is improbable, and possibly fully implausible.
      1 reply 0 retweets 0 likes
    3.  🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
      Replying to @mchapiro @LauraDeming

      I do think that a new class of semiconductor, or a vastly stronger material like what nanotubes or graphene or even optimized carbon fiber could achieve, or a breakthrough practical superconductor, would have enormous impacts. Perhaps similar in scale to plastic or glass

      2 replies 0 retweets 1 like
    4. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @DanielleFong @LauraDeming

      Well the vast improvements in structural efficiency will not come from something like a carbon nanomaterial, but from manipulating carbon fiber composites at the mesoscale (few millimeters). Wrote about it here. http://www.mantiscomposites.com/documents/jec2.pdf …

      2 replies 0 retweets 1 like
    5. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @mchapiro @DanielleFong @LauraDeming

      I don't think the initial question was well posed if advanced materials with large impacts was the desired response since too open-ended to be meaningful. If it's a poll asking whether materials will continue to represent a large portion of economic growth I'd vote yes.

      1 reply 0 retweets 2 likes
    6.  🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
      Replying to @mchapiro @LauraDeming

      "come from something like a carbon nanomaterial, but from manipulating carbon fiber composites at the mesoscale (few millimeters)" i've thought the same thin, but others have reasons to think advances from the nano end have promise. not sure of either

      3 replies 0 retweets 1 like
    7. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @DanielleFong @LauraDeming

      Zero known ways of making 100% nano-reinforced composites that come anywhere close to the strength and stiffness of microfiber composites. Nor am I aware of any plausible routes.

      3 replies 0 retweets 0 likes
    8. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @mchapiro @DanielleFong @LauraDeming

      I don't think you could find someone working on any nanomaterial that would tell you they are working on something that could take a machined titanium aerospace part and replace it with something that weighs half as much.

      1 reply 0 retweets 0 likes
    9.  🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
      Replying to @mchapiro @LauraDeming

      present day carbon fiber composites can achieve this, So I’m assuming you’re talking about the shortfalls of existing macroscopic performance of pure nano based composites, on which I don’t dispute you, I just think that breakthroughs may be possible

      1 reply 0 retweets 0 likes
    10. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
      Replying to @DanielleFong @LauraDeming

      They certainly cannot or those titanium parts would not be flying (you might have stiffness-dominated aluminum parts not yet replaced with a chopped fiber composites). Composite *laminate* structures are ill-equipped for intricate geometries with many fastener locations.

      3 replies 0 retweets 0 likes
       🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
      Replying to @mchapiro @LauraDeming

      not really "an efficient market" for mechanical components yet, but you're right that chopped fiber composites aren't great. Composite laminate structures are more limited yes but more complex geometries are possible Arevo Labs is doing remarkable things. https://arevo.com/ pic.twitter.com/yow46JIE9F

      8:07 PM - 27 Jun 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Michael Chapiro, Esq., GMI, GFY‏ @mchapiro 27 Jun 2020
          Replying to @DanielleFong @LauraDeming

          Well, yes, if you include stuff that's starting to get commercialized Mantis Composites estimates 70% typical weight savings over machined metals. Alas, Arevo does not know what it's doing and is cringeworthy. I can't go too much into their poor understanding of the markets...

          2 replies 0 retweets 0 likes
        3.  🤷🏻‍♀️‏ @DanielleFong 27 Jun 2020
          Replying to @mchapiro @LauraDeming

          what's wrong with it

          1 reply 0 retweets 0 likes
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