Multimaterial Embedded 3D Printing of Composite Reinforced Soft Actuators

Area of Science:

• Robotics
• Materials Science
• Additive Manufacturing

Background:

• Soft pneumatic actuators (SPAs) are crucial in modern robotics.
• Composite reinforced actuators (CRAs) offer simple structures and high controllability.
• Current fabrication methods for CRAs, like multistep molding, are time-consuming.

Purpose of the Study:

• To introduce a novel multimaterial embedded printing method (ME3P) for fabricating composite reinforced actuators (CRAs).
• To enhance fabrication flexibility and reduce production time compared to traditional methods.
• To demonstrate the capability of ME3P in creating soft robots with diverse and programmable actuation capabilities.

Main Methods:

• Development and implementation of a multimaterial embedded printing method (ME3P).
• Design and fabrication of reinforced composite patterns and soft body geometries.
• Utilizing finite element analysis (FEA) for pneumatic response prediction and inverse design.
• Fabrication of tube-crawling robots as a model system for practical applications.

Main Results:

• ME3P significantly improves fabrication flexibility for CRAs.
• Actuators with programmable responses including elongation, contraction, twisting, bending, and helical/omnidirectional bending were successfully fabricated.
• FEA effectively predicted pneumatic responses and facilitated inverse design.
• Complex soft robots, such as tube-crawling robots, were demonstrated using the ME3P technique.

Conclusions:

• ME3P offers a versatile and efficient approach for manufacturing composite reinforced actuators.
• This method opens new possibilities for the rapid prototyping and production of advanced soft robots.
• The demonstrated capabilities highlight the potential of ME3P for future applications in soft robotics manufacturing.