Mechanics of hierarchical twisted and coiled polymer artificial muscles: Decoupling force from kinematic limits
Ye Xiao, Zhao Luo, Falin Tian, Xinghao Hu, Dabiao Liu, Chun Li · arXiv · 2026
This study explores a hierarchical structure in twisted and coiled polymer muscles to enhance performance by decoupling force generation from kinematic limits.
Plain English summary
Why this matters
Key findings
- Hierarchical structure amplifies isometric actuation stress compared to monofilament designs.
- Maintains a contraction stroke of approximately 22%.
- Identifies a critical topological threshold for optimal performance.
- Demonstrates a stiffness-stroke synergy in high helical angles.
- Volumetric energy density can be scaled without losing efficiency.
What's new
The introduction of a hierarchical helical structure that decouples force generation from kinematic limits is a new approach in the design of artificial muscles.
Limitations
The abstract does not provide specific applications or commercial readiness of the proposed structures.
Commercial context
The findings are theoretical and have not yet been demonstrated in practical applications.
Publication
- Publisher
- arXiv
- Publication date
- February 1, 2026
- Research type
- Preprint
- arXiv
- 2602.06067
- Access
- open
Tags
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