Metal Binder Jetting
Automotive Polymers

Researchers Study Self-Assembly with 3D Printed Bricks, Hoping to Eliminate Factory Assembly Lines

Share this Article

images

Bricks have been used for thousands of years, with masonry as an art practiced by experienced souls, many of whom may be surprised to hear that a new study shows that with high-frequency vibration, bricks are actually able to morph into larger 3D objects.

The long-term impact for this discovery could mean less work available at the factory assembly line, as well as presenting numerous positive impacts in sectors such as construction.

Previously not a concept thought to apply to other dimensions due to a lack of specific algorithm programming, researchers from the Institute for Nanotechnology and Advanced Materials at Bar-Ilan University in Israel, led by Dr. Ido Bachelet, have now developed such a system and are indeed able to program materials into self-assembly.

UntitledWhat is self-assembly, and why are we bothering with it? A convenient mechanism exhibited by nature, we aim to re-create it as often as possible in other areas through information driven routes that are able to offer greater affordability and streamlining for numerous practices–with manufacturing as a case in point. This is discussed at length in a new research paper, ‘Meshing complex macro-scale objects into self-assembling bricks,’ just published by Adar Hacohen, Iddo Hanniel, Yasha Nikulshin, Shuki Wolfus, Almogit Abu-Horowitz, and Ido Bachelet.

“Self-assembly and self-organization are among the most peculiar, puzzling aspects of life,” state the researchers astutely at the beginning of their paper. “They occur at all scales: proteins, viruses, living cells, multicellular organisms, and swarms or societies of multicellular organisms. All these systems are comprised of interacting discrete parts that are attracted to each other in defined ways, leading to the formation of a global structure or pattern.”

They bring to light the new algorithm that can program self-assembly on the macro scale, using the unlikely, dense subject of bricks as their example–on a molecular level. Inspired by scaffolded DNA origami, which has been responsible for the fabrication of numerous nanoscale shapes, the researchers challenged themselves to program self-assembly in “solid, complex, asymmetric objects in 3D.”

In their project, the researchers 3D printed batches of bricks for their work on a Stratasys/Object Eden 250 3D printer using either VeroWhite or DurusWhite as printing materials. Supports were used and then removed, after which Neodymium-Iron disc magnets were glued to the 3D printed bricks. Set up in pairs, the fabricated bricks were given complementary faces. Eighteen tetrahedral bricks were placed in a large 3D cylinder and manipulated for self-assembly with a Multitron orbital shaker with speed control ranging up to 400 rpm.

“Assembly rules are encoded by topographic cues imprinted on brick faces while attraction between bricks is provided by embedded magnets,” the researchers said in their paper. “The bricks can then be mixed in a container and agitated, leading to properly assembled objects at high yields and zero errors.”

UntitledWhile so many differences from scaffolded DNA origami were built into the research project, many surprising similarities were discovered even though the DNA origami does not depend on algorithms for self-assembly. For one, although they delegated long periods of time for self-assembly, they discovered it took only seconds to complete; also, the brick self-assembly showed reliance on concentration of volume just as in the DNA origami.

“When the area was too large, brick assembly was inefficient and often did not take place at all,” state the researchers. “This could be solved by introducing ‘solvent’ bricks – inert, magnet-free bricks that do not participate in the assembly itself, but contribute to assembly by colliding and fixing incorrect assemblies. This concept can be extended as a general principle in future systems.”

Each experiment was repeated ten times. While previously a two-brick assembly did take less than a minute to self-assemble, the 18-piece took over two hours. Both audio and video were recorded and then the data was stored for analysis to be assessed by MATLAB.Untitled

“Improved designs inspired by our system could lead to successful implementation of self-assembly at the macro-scale, allowing rapid, on-demand fabrication of objects without the need for assembly lines,” stated the researchers.

Hamza Bendemra, a research engineer at Australian National University who was not involved in the study, found the research ‘remarkable,’ but he remains somewhat skeptical until more research can be done.

“The components are subject to high vibrations and collide over and over again until they fit in the right combination,” said Bendemra. “It would be a challenge to implement such a method with materials with low strength and poor impact tolerance without causing damage.”

While the conceptual implications certainly have great potential in terms of construction, manufacturing, and progressive new ways to package larger and smaller items, it remains to be seen how the self-assembly would work in a fashion where everything was not topographically designed to lock in, according to Bendemra.

Indeed, the next step in this research is to experiment with both magnets and adhesives for keeping all the pieces together. The hope is that this could lead to more efficient manufacturing practices, cutting out time on the factory line. The bottom line could be seriously cut if the pieces were able to ‘assemble themselves.’

Discuss your thoughts on this self-assembly concept in the 3D Printed Bricks forum thread over at 3DPB.com.

 

Share this Article


Recent News

3D Printing News Unpeeled, Live with Joris Peels – Tuesday 9th of August

UCLA Materials Scientists Awarded Grant for 3D Printed Batteries



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Featured

3D Systems Buys High-Speed 3D Printing Firm dp polar

The 3D printing mergers and acquisitions continue apace. On the heels of Markforged’s buyout of Digital Metal and Nano Dimension’s 12 percent purchase of Stratasys, 3D Systems (NYSE: DDD) has...

New Player in Space: X-Bow’s Test Rocket Reaches Orbit with 3D Printed Motors

Just four months after coming out of stealth mode, space technology company X-Bow Launch Systems successfully launched its first rocket in a test carried out in partnership with the Department...

Sakuu Opens Battery 3D Printing Facility in Silicon Valley

Silicon Valley startup Sakuu is using some of the funds from its total $62 million raised to open a new facility for its battery 3D printing platform. The multi-million-dollar site...

US DoE Awards $3M to Fortify and polySpectra for 3D Printed Tooling

The US Department of Energy (DOE) announced 30 projects that have been selected to receive a total of $57.9 million in grants from the Advanced Manufacturing Office (AMO). Among the...