Dome-Patterned Metamaterial Sheets

Area of Science:

• Materials Science
• Mechanical Engineering
• Robotics

Background:

• Conventional material properties are determined by atomic-level interactions.
• Metamaterials enable property control via mesoscale structural design, expanding material possibilities.
• Existing mechanical metamaterials offer limited programmability and tunable responses.

Purpose of the Study:

• To introduce a new class of mechanical metamaterials with reconfigurable bistable domes.
• To demonstrate the ability to program multistable shapes and tune mechanical responses.
• To explore the potential of these metamaterials in advanced applications.

Main Methods:

• Fabrication of soft sheets with patterned arrays of reconfigurable bistable domes using 3D printing.
• Local inversion of domes to achieve global changes in shape and mechanical properties.
• Integration into a robotic gripper to showcase energy storage and signal processing capabilities.

Main Results:

• Demonstrated reversible inversion of bistable domes for programmable shape morphing.
• Achieved tunable global mechanical responses through local structural modifications.
• Successfully created a robotic gripper with energy-storing skin and mechanical signal computation.

Conclusions:

• The developed mechanical metamaterials offer a versatile platform for novel mechanologic concepts.
• These metamaterials present new design opportunities for robotics, architecture, and biomedical devices.
• The ability to program mechanical behavior opens avenues for adaptive and intelligent structures.