‘Action-at-a-distance’ metamaterials for soft robotics, developed by TU Delft researchers (video)

soft robotics

Action-at-a-distance’ metamaterials for soft robotics, developed by TU Delft researchers

Mechanical metamaterials are a sub-category of designer materials where the geometry of the material at the small-scale is rationally designed to give rise to unusual properties and functionalities. Here, we propose the concept of “action-at-a-distance” metamaterials where a specific pattern of local deformation is programmed into the fabric of (cellular) materials. The desired pattern of local actuation could then be achieved simply through the application of one single global and far-field force. We proposed graded designs of auxetic and conventional unit cells with changing Poisson’s ratios as a way of making “action-at-a-distance” metamaterials.
We explored five types of graded designs including linear, two types of radial gradients, checkered, and striped. Specimens were fabricated with indirect additive manufacturing and tested under compression, tension, and shear. Full-field strain maps measured with digital image correlation confirmed different patterns of local actuation under similar far-field strains. These materials have potential applications in soft (wearable) robotics and exosuits.

Continue reading “‘Action-at-a-distance’ metamaterials for soft robotics, developed by TU Delft researchers (video)”

3D and 4D printing of edible and living hydrogel materials – Presented by Marc in het Panhuis, University of Wollongong

Marc in het Panhuis

3D and 4D printing of edible and living hydrogel materials – Presented by Marc in het Panhuis, University of Wollongong, at the 4D Printing & Meta Materials Conference, on April 18, 2018, at Brightlands Chemelot Campus in Sittard-Geleen, The Netherlands.

Hydrogels are smart and multifunctional materials with a real potential for use novel applications including soft robotics, (edible) sensors and bionic implants. Consisting of a highly swollen polymer network, hydrogels are typically soft and brittle meaning they are not compatible with many traditional techniques used to process materials into structures.

In this presentation, I will demonstrate a variety of (extrusion-based) 3D and 4D printing techniques for processing hydrogel inks alongside other inks of structural polymers to create composite architectures including a smart valve, an artificial cartilage meniscus, an artificial tendon, brain-like structures, edible electronic circuits, stretchable devices and edible/living hydrogels. Continue reading “3D and 4D printing of edible and living hydrogel materials – Presented by Marc in het Panhuis, University of Wollongong”

4D Printing + Bioprinting = 4D Bioprinting

4D bioprinting

4D Printing + Bioprinting = 4D Bioprinting

Making and utilizing new materials to improve our life is a defining feature of mankind. We moved on from the stone age, to the bronze age, to the age of silicon and plastic. Now we are at the edge of a new episode, where technological breakthroughs allow us to create, investigate and dream of a total new range of structured forms of matter. Continue reading “4D Printing + Bioprinting = 4D Bioprinting”

The Eiffel Tower recovering its shape using 4D Printing

4D printing

The Eiffel Tower recovering its shape using 4D Printing.Unlike 3D printing, 4D printed structures have the potential to transform shape in a pre-programmed way in response to a stimulus (e.g. changes in temperature). These types of structural transformations currently exist outside of additive manufacturing, with research having already demonstrated “shape memory” and “smart material” properties. Continue reading “The Eiffel Tower recovering its shape using 4D Printing”

TU Delft researchers develop self-twisting of DNA-inspired constructs (VIDEO)

self-twisting of DNA-inspired constructs

TU Delft researchers develop self-twisting of DNA-inspired constructs. Researchers at TU Delft have made flat surfaces that are 3D printed and then ‘taught’ how to self- fold later. The materials are potentially very well suited for all kinds of medical implants. They report on their findings in the October 24th edition of Materials Horizons which features this research on its cover.

Continue reading “TU Delft researchers develop self-twisting of DNA-inspired constructs (VIDEO)”

New 3D-printed material technology lets objects be both hard and soft (Video)

3D-printed material

New 3D-printed material technology lets objects be both hard and soft. Recently, researchers started to engineer not only the outer shape of objects, but also their internal microstructure. Such objects, typically based on 3D cell grids, are also known as metamaterials. Metamaterials are artificial structures with mechanical properties that are defined by their usually repetitive cell patterns, rather than the material they are made of. Continue reading “New 3D-printed material technology lets objects be both hard and soft (Video)”

Tikcit is registration platform partner of 4D Printing & Meta Materials Conference

tikcit

Tikcit is registration platform partner of 4D Printing & Meta Materials Conference , which will take place on 1 February 2017 at Brightlands Chemelot Conference Center in Sittard-Geleen, The Netherlands

About Tikcit
Organising an event implies many issues, from ticketing to e-payments, from statistics to ordering supplies, from surveys to social media and many many more. Tikcit is the platform to support you. Continue reading “Tikcit is registration platform partner of 4D Printing & Meta Materials Conference”

New shape-changing smart material developed by Washington State University researchers (Video)

smart material

Washington State University researchers have developed a unique, multifunctional smart material that can change shape from heat or light and assemble and disassemble itself. They have filed a provisional patent on the work.

This is the first time researchers have been able to combine several smart abilities, including shape memory behavior, light-activated movement and self-healing behavior, into one material. They have published their work in ACS Applied Materials & Interfaces. Continue reading “New shape-changing smart material developed by Washington State University researchers (Video)”