The effect of 4D printed internal structure on the shape memory effect of shape memory polymers

Jiwoo Choi

by Jiwoo Choi, Dyson School of Design Engineering, Imperial College London

One way to 4D print is through the use of Shape Memory Polymers (SMP). these are a type of polymer which react to an external stimulus (e.g. temperature) and subsequently change their shape in a programmed manner. Previous 4D printing research has focused on different material properties (chemistry) or geometric shape (size, thickness etc.) to control its morphing behaviour.

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Thermo-Mechanical Metamaterials: Towards Stimuli Responsive Micro-Robotics

Ji Qingxiang

by Ji Qingxiang, Femto-st, CNRS, Université de Franche-Comté (UFC)

Metamaterials have attracted large scientific interest as promising candidates to break some fundamental bound on materials properties and to realize some dreaming devices such as the invisibility cloaks or the perfect flat lenses based on negative refraction.

However, the bounds appeared to be more fundamental and the field has extended to some coupled physical phenomena where one physics acts as the driving force. They are called stimuli-responsive metamaterials and have been demonstrated in many combinations like thermoelastic, magneto-optics, piezo-electric etc. In this paper, we show the possibility of printing the basic elements of a 3 axis microrobot using single-step lithography.

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Topology optimization of structures with metamaterials – Presented by Jun Wu, TU Delft

Jun Wu

Jun Wu, TU Delft, will speak at 4D Printing & Meta Materials Conference, on April 17, during the 3D Printing Event in The Netherlands.

Lightweight structures are of ultimate importance in aerospace, automotive, and industrial design engineering. Typically structures are designed and manufactured with solid materials. Emerging porous metamaterials offer new opportunities and challenges for the design of functional structures.

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Programmable Meta-materials Based on Multistable Meta-atoms – Presented by Mohamed Zanaty, EPFL

Mohamed Zanaty

Mohamed Zanaty, INSTANT-LAB, EPFL, will speak at 4D Printing & Meta Materials Conference, on April 17, during the 3D Printing Event at Brightlands Chemelot Campus in The Netherlands.

In this talk, I will present a novel family of programmable metamaterial based programmable multistable mechanisms (PMM). PMMs are multistable mechanisms where the stability behavior depends on the mechanism boundary conditions. Different examples of PMMs will be presented to illustrate the concept of stability programming.

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Dynamic Mechanical Metamaterials – Presented by David Dykstra, University of Amsterdam

David Dykstra

Dynamic Mechanical Metamaterials – Presented by David Dykstra, University of Amsterdam, at 4D Printing & Meta Materials Conference, on April 17, during the 3D Printing Event at Brightlands Chemelot Campus in The Netherlands.

In years, mechanical metamaterials has surged as a field of research, with many new concepts developed.

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4D Printing for Smart Cities – Duo presentation by Hiroya Tanaka & Hitomi Kuboki, Keio University SFC

Hiroya Tanaka

Hiroya Tanaka and Hitomi Kuboki from Keio University SFC will speak at the 4D Printing & Meta Materials Conference, on April 17, during the 3D Printing Event at Brightlands Chemelot Campus in The Netherlands.

We believe one of biggest application fields of 4D Printing is “Smart City”. We will introduce our novel design of “transformable car” and “environmental facade”, and explain updates of our original hardware (multi-head big 3d printer with super soft materials) and software (g-code editing). Continue reading “4D Printing for Smart Cities – Duo presentation by Hiroya Tanaka & Hitomi Kuboki, Keio University SFC”

Additive manufacturing of passive and active optical components – Presented by Andreas Heinrich, Aalen University

Andreas Heinrich

Additive manufacturing of passive and active optical components – Presented by Andreas Heinrich, Aalen University, Center for Optical Technologies, at the 4D Printing  & Meta Materials Conference, on April 17, during the 3D Printing Event at Brightlands Chemelot Campus in The Netherlands.

Additive manufacturing enables the realization of complex shaped parts. This also provides a high potential for optical components. Thus elements with virtually any geometry can be realized, which is often difficult with conventional fabrication methods. Continue reading “Additive manufacturing of passive and active optical components – Presented by Andreas Heinrich, Aalen University”

ExportHub is media partner of 4D Printing & Meta Materials Conference

exporthub

ExportHub is media partner of 4D Printing & Meta Materials Conference

About ExportHub
ExportHub is an international B2B marketplace brand formed by a group of B2b & Internet marketing experts, who have spent their lifetime in pursuit of technology projects. People at ExportHub have prior internet marketing experience and are thorough with industry related knowledge.
Combining our strong B2B experience, technology expertise and profound knowledge of current industry trends, ExportHub offers innovative solutions to your business problems.

Unlike other B2B’s, ExportHub offers guaranteed result oriented services that differentiate us from the other B2B & Internet marketing industry. Over the last decade, ways to do business has changed multi-folds. To unleash your maximum business potential, we offer high-tech B2B and full-scale digital services. Continue reading “ExportHub is media partner of 4D Printing & Meta Materials Conference”

4D Textiles: 3D printed hybrid textiles for shape change and self assembly – Presented by David Schmelzeisen, Insitut für Textiltechnik der RWTH Aachen University

David Schmelzeisen

4D Textiles: 3D printed hybrid textiles for shape change and self assembly – Presented by David Schmelzeisen, Insitut für Textiltechnik der RWTH Aachen University at the 3rd edition of 4D Printing & Meta Materials Conference, which takes place on 18 April 2018 at Brightlands Chemelot Campus in Sittard-Geleen, The Netherlands.

Textile materials combined with 3D printing technology create the opportunity to explore “4D Textiles” – hybrid systems that can change form and/or function with the application of relatively small external energy. 4D printing is currently explored with the use of smart materials allowing a 3D printed structure to change form under the application of heat. Hybrid textiles are being explored with the use of elastic knitted fabrics and 3D printing to create interesting shapes formed by the stored elastic energy in the textile.

There has been rapid growth in research regarding 3D printing in recent years driven by the low cost and material efficiency of the technology. Combining 3D printing and textile materials is still a relatively new research area. However it is a growth area that offers the promise of “4D Textiles” – hybrid textile/3D printed structures that can change structural form with time.

4D Textiles explore the interaction of elastic textiles and 3D printing, wherein the textile is pre-stretched prior to printing, and after the printing is complete the fabric strain causes curvature in the assembly for example.
The underlying concept behind these hybrid material systems is to store energy in the textile material prior to printing and then release that energy to affect form and function of the hybrid system. Typically knitted fabrics that contain elastic material are used due to the high elastic strain available and sufficient recovery force.
Continue reading “4D Textiles: 3D printed hybrid textiles for shape change and self assembly – Presented by David Schmelzeisen, Insitut für Textiltechnik der RWTH Aachen University”

4D printing of modified polycaprolactone with self-healing abilities – Presented by Marta Invernizzi, Politecnico di Milano

Marta Invernizzi

4D printing of modified polycaprolactone with self-healing abilities – Presented by Marta Invernizzi, Politecnico di Milano at the 3rd edition of 4D Printing & Meta Materials Conference, which takes place on 18 April 2018 at Brightlands Chemelot Campus in Sittard-Geleen, The Netherlands.

In this work a 4D printed shape memory polymer with self-healing abilities is presented. The shape memory effect is provided by a polycaprolactone (PCL), while the self-healing behavior by 2-ureido-4[1H]pyrimidinone units (UPy). To print them in a DLP printer, a common solvent was added. Printed specimens show a stiffness comparable to neat PCL, but higher elongation at break. To demonstrate the feasibility as sensor for soft robotics an opposite thumb was printed and subjected to the shape memory effect after a healing process. Continue reading “4D printing of modified polycaprolactone with self-healing abilities – Presented by Marta Invernizzi, Politecnico di Milano”