Kirigami-Inspired 3D Printable Soft Pneumatic Actuators with Multiple Deformation Modes for Soft Robotic Applications

Area of Science:

• Robotics
• Materials Science
• Mechanical Engineering

Background:

• Soft robots offer advantages in flexibility and safety over traditional robots.
• Soft actuators are key components, but existing designs often have limited deformation modes.
• Developing versatile soft actuators is crucial for advancing soft robotic applications.

Purpose of the Study:

• To propose a new soft pneumatic actuator (SPA) inspired by Kirigami principles.
• To enable multiple deformation modes within a single soft actuator.
• To demonstrate the potential of this Kirigami-inspired soft pneumatic actuator (KiriSPA) in various soft robotic systems.

Main Methods:

• Designing a soft pneumatic actuator with Kirigami-inspired cuts.
• Utilizing 3D printing (fused deposition modeling) for fabrication.
• Employing finite element method (FEM) for analysis and prediction of deformation modes.
• Characterizing performance metrics including step response, creep, hysteresis, actuation speed, stroke, workspace, stiffness, power density, and blocked force.

Main Results:

• The KiriSPA exhibits multiple deformation modes: bending, stretching, contraction, and combined motions.
• The actuator can be manufactured using standard 3D printing technology.
• FEM analysis accurately predicted the KiriSPA's deformation behaviors.
• Comprehensive characterization revealed its performance capabilities.

Conclusions:

• The proposed KiriSPA offers enhanced dexterity and multi-modal functionality for soft robotic systems.
• KiriSPAs can be integrated into various applications, including grippers, manipulators, and locomotion robots.
• This Kirigami-inspired design represents a significant advancement in soft actuator technology.