Exploiting the temperature-memory effect in 3D printed auxetic structures

Stefano Pandini

from experimental design to analytic simulation.

The combined employ of the additive manufacturing approach with shape memory polymers (SMPs) is one of the possible strategies towards 4D-printing, in particular when aiming at the realization of highly effective shape shifting objects. SMPs are in fact active systems, capable of being temporarily fixed in a deformed configuration and to revert to the pristine shape upon application of a thermal stimulus. In addition, this response may be finely tuned by a proper combination of the thermo-mechanical history and of the material macromolecular architecture.

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The Tokyo 2020 Olympic and Paralympic 3D Printing Podium and our re-use program as acoustic metamaterials

We designed and created the Tokyo 2020 Olympic and Paralympic 3D Printing Podium using recycled materials. Also, we are supporting its re-use program as acoustic metamaterials. In this presentation, we introduce our design and fabrication processes, and new ideas of re-cycle and re-use including metamaterial concepts.

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3D Printed Modular Soft Grippers Integrated with Metamaterials for Comformal Grasping

This presentation will present a 3D printed soft gripper with integrated metamaterial for conformal grasping. The design, modeling, and characterization of the soft modular gripper will be presented. These soft robots have many interesting and impactful applications in a wide range of industries.

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Development of a new flexible wing concept for unmanned aerial vehicles using corrugated core made by 4D printing of composites

wing

This paper presents the feasibility study of the application of the method of 4D printing of composites for the efficient manufacturing aircraft morphing wings. The wing has upper and lower skin, and a corrugated core. The corrugated core is made using the concept of 4D printing of composites. With this concept, there is no need for a mold with complex geometry to make the corrugated core. Instead, only a flat mold is used. A prototype of the wing was made and tested. It was shown that this wing can the sustain the load of a medium size Unmanned Aerial Vehicle, with flex angle up to 20 degrees.

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4D printing of bioinspired hygromorph natural fibre composite : Green and Smart functionalities

shap

A presentation by Antoine le Duigou is Associate-Professor in Institut de Recherche Dupuy de Lome at Université de Bretagne Sud (Lorient France).

This presentation proposes a critical overview of the current state of 4D printing of hygromorph biocomposites for stimuli-responsive applications.
Hygromorph BioComposites (HBC) are categorized into a new class of smart materials that could be used for 4D printing of shape-changing mechanisms. Fibre anisotropic properties, fibre content and their orientation, polymer stiffness are material parameters that control the morphing. Slicing parameters during 4D printing such as Layer Height and various Interfilament Distance enable a programmation of the hygromorph biocomposites response. The potential of sequential complex actuation will be discussed.

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