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Design of 3D Printed Programmable Horseshoe Lattice Structures Based on a Phase-Evolution Model.
Dong Wang1, Haipeng Xu1, Jinqiang Wang1
1Robotics Institute and State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ACS Applied Materials & Interfaces
|April 23, 2020
Summary
Researchers developed a design framework for 3D printed lattice structures that enables controllable shape changes using thermal stimulus. This allows programming diverse shapes for applications in soft robotics and biomedicine.
Area of Science:
- Materials Science
- Mechanical Engineering
- Computational Modeling
Background:
- 3D printing active material lattice structures enables stimulus-responsive shape changes.
- Programmable shape changes are limited by complex geometries, material nonlinearity, and diverse stimuli.
Purpose of the Study:
- To propose a design framework for controllable shape changes in 3D printed horseshoe structures under thermal stimulus.
- To combine experimental, theoretical, and simulation methods for design optimization.
Main Methods:
- Developed a theoretical model based on phase evolution, incorporating geometrical and material nonlinearity.
- Utilized finite element simulations to analyze structure behavior.
- Conducted experiments to validate the design framework.
Main Results:
- Demonstrated programmable shape changes, including positive/negative Poisson's ratio and bending shapes.
- Showed that shape programming is achievable by tuning geometrical parameters and temperature distribution.
Conclusions:
- The proposed design framework aids in designing 3D printed functional lattice structures.
- Potential applications include soft robotics, biomedicine, and energy-absorbing fields.
