Continuous models for peristaltic locomotion with application to worms and soft robots

Area of Science:

• Robotics
• Biophysics
• Continuum Mechanics

Background:

• Peristaltic locomotion is a fundamental biological movement.
• Modeling soft-bodied robots requires advanced continuum mechanics.
• Existing models may not fully capture the complexities of incompressible materials.

Purpose of the Study:

• To develop a continuous model for peristaltic locomotion of rod-like bodies.
• To incorporate muscle actuation models within a continuum framework.
• To validate the model using soft-robotic simulations and biomimetic comparisons.

Main Methods:

• Utilized Green and Naghdi's theory of a directed rod.
• Enforced incompressibility as an internal constraint.
• Developed and simulated a soft-robotic device based on the model.
• Calibrated parameters and validated against earthworm locomotion models.

Main Results:

• A robust continuous model for peristaltic locomotion was established.
• Incompressibility was successfully modeled as an internal constraint.
• The soft-robotic simulation demonstrated effective locomotion.
• Model parameters were calibrated and validated against biomimetic data.

Conclusions:

• The developed continuous model accurately represents peristaltic locomotion in rod-like bodies.
• The approach is suitable for designing and simulating bio-inspired soft-robotic systems.
• The study provides a validated framework for understanding and replicating biological locomotion.