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Snapping for 4D-Printed Insect-Scale Metal-Jumper.

Yang Yang¹, Yongquan Wang¹

¹School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|November 24, 2023

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Cobalt MOF-Based Porous Carbonaceous Spheres for Multimodal Soft Actuator Exhibiting Intricate Biomimetic Motions.

Advanced materials (Deerfield Beach, Fla.)·2024

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Researchers developed a novel insect-scale jumper using shape memory alloys (SMAs) and 4D printing. This smart material jumper achieves impressive jump heights and speeds, paving the way for advanced miniaturized robots.

Area of Science:

Robotics and Mechanical Engineering
Materials Science
Biomimetics

Background:

Replicating insect-scale jumping motions is challenging due to size effects.
Shape memory alloys (SMAs) offer high work-to-weight ratios for jumping actuators but face limitations in speed and configuration.
Existing designs struggle with miniaturization and efficient energy transfer for jumping.

Purpose of the Study:

To propose a novel insect-scale shape memory alloy jumper (net-shell) design.
To integrate 4D printing technology with a bistable power amplification mechanism for enhanced performance.
To investigate the energy dynamics and photo-driven shape transition of the SMA net-shell.

Main Methods:

Developed an insect-scale SMA jumper (net-shell) using 4D printing.

Keywords:

4D printing bistable structure jumping photo-driven technique shape memory alloys snapping mechanism

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Last Updated: Jul 10, 2025

Building an Enhanced Flight Mill for the Study of Tethered Insect Flight

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Utilized a spring-mass model to analyze energy variations under different states and loads.

Employed a non-contact photo-driven technique for shape transition induction.

Conducted experimental investigations on deformation, energy release, and light power density effects.

Main Results:

The SMA net-shell demonstrated remarkable jumping capabilities.
Achieved jump heights of 60 body lengths and takeoff speeds up to 300 body lengths per second.
Showcased potential for applications in unstructured terrains through illustrative case studies.

Conclusions:

The novel SMA net-shell design offers a promising approach for miniaturized jumping mechanisms.
Integration of smart materials and advanced 4D printing structures enhances jumping performance.
The developed jumper has potential for locomotion in complex, unstructured environments.