Programmable shape-shifting 3D structures via frontal photopolymerization

Materials & Design

Qi Ge¹  Xiaoming Mu²  Dong Wang³  Jinqiang Wang⁴  Chengru Jiang⁴  Ning Dai⁵  Biao Zhang⁶ 

[1] Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China;Department of Mechanical Engineering, Wilkes University, PA 18701, USA;Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China;Robotics Institute and State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics University, Nanjing 210016, PR China;;Xi'an Institute of Flexible Electronics and Xi'an Key Laboratory of Biomedical Materials &

关键词: Programmable shape-shifting;    Frontal photopolymerization;    Elastic instability;    Edge effect;    Grayscale patterning;   

DOI  :  

来源: DOAJ

【 摘 要 】

Shape-shifting structures have gained growing interest recently and found wide applications in areas such as soft robotics, biomedical devices and self-folding origami, attributed to their ability to construct complicated shapes directly from simple structures. However, an efficient method to design and fabricate programmable 3D shape-shifting structures from 2D polymer films still lacks. In this work, we design programmable shape-shifting 3D structures via the release of internal gradient stress using the frontal photopolymerization (FPP) method. First, the relation between the non-uniformly distributed material and loading parameters, and the geometric and fabrication parameters are established theoretically. The finite element (FE) model is then developed based on the theoretically obtained material and loading parameters. Next, the elastic instability in the shape-shifting behaviors of a cured film is captured through an elastic energy minimization. Furthermore, by using grayscale light patterns, it is shown that we can selectively manipulate the geometric and fabrication parameters to improve the design freedom of various complex 3D structures.

【 授权许可】

Unknown