Improved Mechanical Properties of Polyurethane-Driven 4D Printing of Aluminum Oxide Ceramics

Materials, Journal Year: 2025, Volume and Issue: 18(8), P. 1750 - 1750

Published: April 11, 2025

The current deformation scheme used in the 4D printing of ceramics has several disadvantages, such as a poor capacity, high process complexity, and mechanical properties product. In order to solve these problems, introduced this study utilizes pyrolytic expansion polyurethane resulting pores hinder contraction specimen during ceramization stage. Then, is composited with polyurethane-free portion that rate shrinkage, initiated through interlayer stress mismatch generated by difference shrinkage different layers, thus enabling preparation complex structural ceramics. This solution simple efficient; heat treatment performed single pass, precursor highly deformable. incorporation capacity aluminum oxide ceramic powder was increased replacing part Dow Corning SE 1700 polydimethylsiloxane silicone rubber raw material DC 184 rubber, which, turn, improved obtained enhancing solid-phase content powder. Due introduction polyurethane, secondary pore structure, which potential for application field engineering materials insulation materials.

Language: Английский

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River valley-inspired, high-sensitivity, and rapid-response capacitive three-dimensional force tactile sensor based on U-shaped groove structure

Smart Materials and Structures, Journal Year: 2024, Volume and Issue: 33(3), P. 035006 - 035006

Published: Feb. 2, 2024

Abstract High-performance three-dimensional force (3D-force) tactile sensors with the capability of distinguishing normal and tangential forces in sync play a vital role emerging wearable devices smart electronics. And there is an urgent need for 3D-force fast response high flexibility. Herein, we design capacitive inspired by U-shaped river valley surface morphology, which has satisfactory performance terms rapid response/recovery time (∼36 ms/∼ 36 ms), low hysteresis (4.2%), sensitivity (0.487 N −1 ). A theoretical model general value congener also proposed, obtaining higher through optimizing parameters. To verify application potential our device actual scenarios, robustness testing gripping gamepad were carried out. it can recognize different motions humans. Furthermore, principal component analysis conducted to demonstrate distinct classification motions. Therefore, work eligible applications electronics, human–machine interaction, soft intelligent robots.

Language: Английский

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The Nonlinear Mechanical Constitutive Model and Deep Learning Method to Inverse Design Dual‐Feature‐Integrated Lattice Metamaterial

Advanced Engineering Materials, Journal Year: 2024, Volume and Issue: 26(10)

Published: March 12, 2024

The bio‐inspired lattice structure of a regularly fibrous organization is kind structural material with practical value in flexible bio‐integrated electronics. recently proposed dual‐feature‐integrated can accurately customize the nonlinear mechanical curve biological issues. However, it still lacking constitutive models to inverse design desirable properties. Herein, model for metamaterial established by introducing equilibrium equation and deformation coordination conditions. experimental numerical results show that predict stress–strain curves structure. In addition, machine learning‐whale optimization algorithm method used structure, which quickly find target responses (chicken skin human skin) board space. has higher option comparison pure horseshoe chiral metamaterial. finding this work contributes designs structures flexibility stretchable

Language: Английский

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Review on advancements in 3D/4D printing for enhancing efficiency, cost-effectiveness, and quality

International Journal on Interactive Design and Manufacturing (IJIDeM), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 3, 2024

Language: Английский

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Stretchable conductive shape-memory nanocomposites for programmable electronics via photo-mediated multiscale structural design

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154656 - 154656

Published: Aug. 8, 2024

Language: Английский

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