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
- Read Michael Mann's pulse-pounding intro for the true-crime book Hunting LeRoux on February 19, 2019 at 1:01 pm
That look of ennui on his face decays into selfpity, because he knows he ... ways even sophisticated drug cartels or arms merchants operated. They still had “farm-to-the-arm ... […]
- Self-Healing Materials Market Size, Status, Dynamic, Growth, Share And Foresight 2019-2028 on February 18, 2019 at 9:16 pm
Self-healing materials are synthetically manufactured products that ... Disclaimer: You are now leaving PharmiWeb.com website and are going to a website that is not operated by us. We are not responsi... […]
- Are You a Self-Interrupter? on January 31, 2019 at 3:58 pm
It all started with the graphical user interface that took us from the flat, two-dimensional text-based environment that operated on a ... often in simulated 3-D. We hear high-definition stereo ... […]
- Scientists create reverse osmosis membranes with tunable thickness on August 16, 2018 at 11:01 am
A schematic illustration -- both top and side view -- of the 3-D printing electrospray process used to create ... use electrospraying to apply a fine layer of material to a substrate attached to a rot... […]
- A 3D printed artform: UWE researchers use six-axis robot arm to create new 3D printed textures and patterns on July 30, 2018 at 12:40 pm
To achieve new 3D printed artist forms, the project is using the robot arm to research technologies and techniques to sense and manipulate PLA materials in dynamic ways. The robot is operated by print... […]
- University of Leeds project is developing tarmac 3D printing robots to repair roads on June 15, 2018 at 3:15 am
Photo via Self Repairing Cities ... not the first to delve into 3D printing with construction-based materials. China-based additive manufacturing company, Dedibot, debuted its drone operated unlimited ... […]
- MIT’s 3D Printable Magnetic Ink Creates Rapidly Shape-Sifting Objects on June 14, 2018 at 7:02 am
But the innovative engineers at MIT, who have prior experience with using 3D printing to create shape-shifting materials, have developed a 3D ... Some of the structures the researchers 3D printed incl... […]
- AN rounds up our favorite tech books of 2018 on February 15, 2018 at 10:41 am
In Active Matter, Skylar Tibbits curates a discussion between artists, scientists and designers who are working on the cutting-edge of transforming materials, from self-forming furniture ... Gonsalvez ... […]
- US Marines' 'Ripper Lab' used to manufacture 3D printed 'Nibbler' drones in Middle East on October 2, 2017 at 3:48 am
materials, CAD software, etc. in the Middle East. Named “Ripper Lab,” the 3D printing test operation was set up to see how well 3D printing could support the troops. A first of its kind, the 3D printe... […]
- Formlabs moves into 3D printing for manufacturing and announces a new desktop technology on June 5, 2017 at 8:06 am
3D printing startup Formlabs is using its Digital ... as seen in the above video. Kind of a self-continued micro-factory of sorts. The whole process can be controlled remotely, and the system can be o... […]
via Bing News