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 …
Seems a little limiting but ok. Worth preserving 3d printing as a technical term rather than a marketing term lest it be the new "quantum" IIRC the idea behind Arevo is this laser heating of the filatment and then pressing it into the thermoplastic / fiber matrix. Seems newish?pic.twitter.com/3v6IEX1c1G
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That has existed for a while. The version with wider (often 12 inch) spools is called automated tape laying and is used to make large aircraft structures. Thousands of references in Google Scholar, including use of lasers prior to 2015. https://scholar.google.com/scholar?q=automated+fiber+placement+laser+heating&hl=en&as_sdt=0%2C33&as_vis=1&as_ylo=&as_yhi=2015 …
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12 inch is pretty different! this is just my view, but the details of getting everything to work together in the system matters, can usually find aspects of past work in every breakthrough design / product. at the time I looked at it had not seen comparably fine structures
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