Harvard researchers design a tunable, self actuated 3-D material
Imagine a house that could fit in a backpack or a wall that could become a window with the flick of a switch.
Harvard researchers have designed a new type of foldable material that is versatile, tunable and self actuated. It can change size, volume and shape; it can fold flat to withstand the weight of an elephant without breaking, and pop right back up to prepare for the next task.
The research was lead by Katia Bertoldi, the John L. Loeb Associate Professor of the Natural Sciences at the John A. Paulson School of Engineering and Applied Sciences (SEAS), James Weaver, Senior Research Scientist at the Wyss Institute for Biologically Inspired Engineering at Harvard University and Chuck Hoberman, of the Graduate School of Design. It is described in Nature Communications.
“We’ve designed a three-dimensional, thin-walled structure that can be used to make foldable and reprogrammable objects of arbitrary architecture, whose shape, volume and stiffness can be dramatically altered and continuously tuned and controlled,” said Johannes T. B. Overvelde, graduate student in Bertoldi’s lab and first author of the paper.
The structure is inspired by an origami technique called snapology, and is made from extruded cubes with 24 faces and 36 edges. Like origami, the cube can be folded along its edges to change shape. The team demonstrated, both theoretically and experimentally, that the cube can be deformed into many different shapes by folding certain edges, which act like hinges. The team embedded pneumatic actuators into the structure, which can be programmed to deform specific hinges, changing the cube’s shape and size, and removing the need for external input.
The team connected 64 of these individual cells to create a 4x4x4 cube that can grow, and shrink, change its shape globally, change the orientation of its microstructure and fold completely flat. As the structure changes shape, it also changes stiffness — meaning one could make a material that’s very pliable or very stiff using the same design. These actuated changes in material properties adds a fourth dimension to the material.
“We not only understand how the material deforms, but also have an actuation approach that harnesses this understanding,” said Bertoldi. “We know exactly what we need to actuate in order to get the shape we want.”
The material can be embedded with any kind of actuator, including thermal, dielectric or even water.
“The opportunities to move all of the control systems onboard combined with new actuation systems already being developed for similar origami-like structures really opens up the design space for these easily deployable transformable structures”, said Weaver.
“This structural system has fascinating implications for dynamic architecture including portable shelters, adaptive building facades and retractable roofs,” said Hoberman. “Whereas current approaches to these applications rely on standard mechanics, this technology offers unique advantages such as how it integrates surface and structure, its inherent simplicity of manufacture, and its ability to fold flat.”
“This research demonstrates a new class of foldable materials that is also completely scalable,” Overvelde said, ” It works from the nanoscale to the meter-scale and could be used to make anything from surgical stents to portable pop-up domes for disaster relief.”
The Latest on: Self actuated 3-D material
via Google News
The Latest on: Self actuated 3-D material
- Aleph Objects Announces LulzBot Industrial-Grade Desktop 3D Printer on March 27, 2019 at 9:17 pm
Grant Flaharty, Aleph Objects’ CEO and President, stated, “The TAZ Pro is the first true multiple-material 3D printer with dual linear actuated hot ends at a prosumer ... nozzle wiping, and ... […]
- The Secret Life of Amazon’s Vine Reviewers on January 28, 2019 at 10:45 pm
The office is almost all box — furniture, printers (regular and 3-D), computer, at least 13 hard drives and four ... In its earliest days, Amazon operated in plainer view: Products were categorized, ... […]
- Earwig Wings Inspire Researchers to 3D Print Multimaterial, Self-Folding Origami Elements on March 23, 2018 at 8:49 am
Potential applications for the 3D printed, self-folding origami elements include foldable ... Faber, with ETH Zurich’s Department of Materials. “If, on the other hand, they simply refolded ... […]
- One step closer to lifelike robots on September 19, 2017 at 7:22 am
Researchers have developed a 3-D-printable synthetic soft muscle that can lift ... (2017, September 19). One step closer to lifelike robots: A self-contained soft actuator three times stronger than ... […]
- IST Austria Researchers Develop CurveUps: Self-Actuating 3D Printed Objects on June 29, 2017 at 9:04 am
That’s what a group of researchers with the Institute of Science and Technology (IST) Austria are attempting to do in their research on self-actuating objects, which are essentially flat materials ... […]
- Silicon Valley Murder Mystery: How Drugs and Paranoia Doomed Silk Road on April 26, 2017 at 11:19 am
He matriculated at Penn State University, where he studied materials science and engineering ... The nerds who first used 3-D printers wanted to make plastic wall hooks for their bedroom, or a new ... […]
- Creating a Prosthetic Hand That Can Feel on April 28, 2016 at 12:09 pm
But the body tends to reject foreign materials placed within the protective layers of its nerves. In animal experiments, the normal inflammatory process often pushes these electrodes out of the nerve. ... […]
- Foldable material can change size, volume and shape on March 10, 2016 at 4:00 pm
(2016, March 11). Foldable material can change size, volume and shape: Researchers design a tunable, self actuated 3-D material. ScienceDaily. Retrieved April 12, 2019 from ... […]
- High Output Piezo/Triboelectric Hybrid Generator on July 4, 2015 at 1:14 am
Beyond energy harvesting, this work will provide new opportunities for developing a small, built-in power source in self-powered electronics such as mobile electronics. Figure 1(f) shows the 3-D ... […]
- Top 10 Emerging Technologies of 2015 on March 3, 2015 at 4:00 pm
Editor's note: Today the World Economic Forum's Meta-Council on Emerging Technologies ... in which enthusiasts use their own local 3-D printers and make products out of local materials. There are ... […]
via Bing News