3D printing turned another previously theoretical structure into a solid, and this time it was able to deflect the bullet so that it could not be fired. After researchers at Rice University first predicted the structure of microtubes in 1993, they successfully 3d printer manufactured lightweight materials with high impact resistance and load-bearing capacity.
The paper discusses a tube-like structure, and the author Sayadi explained: “There are many theoretical systems that people cannot synthesize, they are still impractical and elusive. But for 3D printing, we can still use the predicted mechanical properties because They are the result of topology, not size.” The design objects based on microtubes are made of polymers and proved to be ten times better than solid blocks of the same material in terms of resistance to bullets. This research paved the way for the development of materials with adjustable mechanical responses.
The renal tubules are complex structures of fullerene tubules based on carbon. Consists of molecules that form a closed cylinder.
RHBaughmana and DS Galvão of Allied Signal Inc. in New Jersey and the Física Institute in São Paulo first predicted the structure and properties of so-called tubulin in 1993. Despite this, carbon microtubules have not yet been established, but Rice’s new research is one of the first to use this structure as an inspiration for physical objects. In the experiment, Sajadi et al. A porous cube was made using 3D printed polymer and a tube-like design. These cubes were then tested and compared with solid cubes made of the same substrate.
When compressed, the pore structure of the microtube allows the cube to collapse instead of breaking like a solid cube. When these blocks were hit by projectiles, a similar effect was observed. The projectile was fired at a speed of 5.8 kilometers per second, and a crack was generated, and the crack spread to the entire solid material block. In the microtubule cube, the bullet is only stuck in the second layer of the structure.
Compared with a solid block of the same material after impact, Rice University produced a tubular microtubular polymer cube (grey) after impact. Photo by Jeff Fitlow
According to research co-author Peter Boul: “The impact resistance of these 3D printed structures gives them their own characteristics.”
As a preliminary study, the Rice team found great potential for applying tubular microtube-like structures to the design of products made of different polymers, ceramics and metals. Rice alumni and co-leader Chandra Sekhar Tiwary explained: “The unique characteristics of this type of structure come from its complex topology, and the topology has nothing to do with the size. The enhancement of topology control or improved load carrying capacity may also be useful for other structural designs. “
The Chinese 3D printing experts believe that this project research is of great significance to the development of new body armor.