Kyushu University: 4D Printing Magnetic Soft Actuators http://bit.ly/2WbLGdJ Japanese researchers from Kyushu University have created a 4D printer for magnetic soft actuators, outlining their research in the recently published paper, ‘Bio-Mimic Motion of 3D-Printed Gel Structures Dispersed with Magnetic Particles.’ Authors Hayato Shinoda, Seiji Azukizawa, Kazuki Maeda, and Fujio Tsumori designed new hardware for making 3D prints as well as 4D printing materials. The result of their work arrives in the form of actuators able to function as biomimetic examples with the potential to deform via a magnetic field—as magnetic anisotropy is ‘applied at each portion of printed structures.’ Each particle is magnetized before printing, causing it to rotate during curing.
There were two different types of biomimetic structures created: a worm-like structure, and an array of artificial cilia. Inspired by nature as scientists so often are, the researchers fabricated actuators able to contract continuously and move forward in a wave-like formation, then deforming. The researchers state that it could be demonstrated as a simple beam structure, separated into two areas.
The artificial cilia samples were created to imitate flowing ‘hair-like organisms,’ exhibiting a metachronal wave. The research team created four kinds of cilium with varying anisotropy.
To date, the team had not yet tested the structures for mechanical strength or other properties, but they were able to estimate residual flux density at about 3 mT, with magnetic flux density of 30 mass% ferrite material estimated at about 25 mT. Stating that finite element analysis would be a ‘powerful tool,’ the researchers explained that it would also be helpful for future studies to use a range of boundary conditions.
If 3D printing offers a multitude of innovations to the world, seemingly almost magical, 4D printing takes that one level further. With materials that morph and adapt to their environment, designers and engineers have created reconfigurable metamaterials, cellulose-based ink, and varying approaches with multiple materials. What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com. [Source / Images: ‘ Bio-Mimic Motion of 3D-Printed Gel Structures Dispersed with Magnetic Particles’] Printing via 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing https://3dprint.com May 29, 2019 at 01:36AM
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