Mechanical, Optical, and Acoustic Metamaterials and Anisotropic Design for Dynamic Control in Actuators and Sensors

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "Actuators for Robotics".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 392

Special Issue Editors

School of Intelligent Manufacturing Ecosystem, Xi'an Jiaotong-Liverpool University, Suzhou, China
Interests: functional material application; tribology; vibration control; manufacturing process analysis; system engineering

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Guest Editor
Department of Mechanical Engineering, Institute of Science Tokyo, Tokyo, Japan
Interests: intelligent mechanics/mechanical systems; design engineering/machine functional elements; tribology
School of Intelligent Manufacturing Ecosystem, Xi'an Jiaotong-Liverpool University, Suzhou, China
Interests: ocean observation/inversion method; fiber optic sensing; piezoelectric material application
School of Science and Technology, Meiji University, Chiyoda, Japan
Interests: additive manufacturing; design engineering; manufacturing system; structural optimization

Special Issue Information

Dear Colleagues, 

This Special Issue aims to gather cutting-edge research on the design, modeling, fabrication, and application of mechanical metamaterials, anisotropic structures, and origami-inspired systems for dynamic control in actuators, sensors and soft robotics devices for next generation functional material integration with structures for realizing high value-added systems.

The primary focus is on how engineered periodic unit cells, graded lattices, nonlinear oscillators, and foldable structures enable the precise tuning of stiffness, vibration modes, and damping characteristics, leading to innovative dynamic functionalities.

To broaden the scope while maintaining a cohesive theme, contributions on any functional materials (such as piezoelectrical and shape memory materials), whether they be optical, acoustic, or micro/nano-fabricated metamaterials, that incorporate anisotropic design or dynamic vibration control principles are also welcome, provided they align with the central concept of dynamic property tuning through engineered structures.

Topics of interest include but are not limited to the following:

  • Anisotropic and graded mechanical metamaterials for vibration, shock, and energy dissipation control.
  • Origami and kirigami structures for deployable and adaptive actuators and soft robotic systems.
  • 3D printing and additive manufacturing techniques for metamaterial fabrication and optimization.
  • MEMS/NEMS-based mechanical, optical, and acoustic metamaterials for actuators.
  • Theoretical modeling and experimental validation of dynamic nonlinear/metamaterial behavior.
  • Applications various multidisciplinary fields such as in soft robotics, aerospace, ocean monitoring, micro assembly, manufacturing, biomedical devices.

We invite original research articles, comprehensive reviews, and case studies that explore innovative materials, designs, and systems to advance dynamic performance and multifunctionality in actuators and soft robotics.

Dr. Yasu Sakai
Prof. Dr. Tomohisa Tanaka
Dr. Xinyi Xie
Dr. Koki Jimbo
Guest Editors

Manuscript Submission Information

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Keywords

  • mechanical metamaterials 
  • anisotropic design 
  • dynamic control 
  • actuators and actuators 
  • soft robotics 
  • functional materials

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Published Papers (1 paper)

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Research

31 pages, 14518 KB  
Article
A Novel Laminar Jamming Mechanism for Variable-Stiffness Robotic Arms
by Freddy Caro, Marc G. Carmichael and Jinchen Ji
Actuators 2025, 14(9), 430; https://doi.org/10.3390/act14090430 - 1 Sep 2025
Viewed by 36
Abstract
A central problem in human–robot interaction is the risk of severe injury in humans in the event of a collision with a rigid robot arm. The introduction of variable stiffness into a robot arm mitigates the effects of impact and generates a safe [...] Read more.
A central problem in human–robot interaction is the risk of severe injury in humans in the event of a collision with a rigid robot arm. The introduction of variable stiffness into a robot arm mitigates the effects of impact and generates a safe interaction in its compliant state. An approach to vary the stiffness of members in a robotic arm is Laminar Jamming. In this article, a new lock/unlock mechanism for Laminar Jamming is proposed. The solution consists of a pneumatic actuator that drives a trapezoidal pin to interfere mechanically with the layers, and, in turn, changing the stiffness of the Laminar Jamming Structure. Additionally, frames are placed along the structure to avoid local buckling of the layers. Experiments and finite element simulations were carried out to study the mechanical performance of this new mechanism. Experiments show that the proposed mechanism reached a maximum stiffness ratio of 3.65, which is 15% higher than the stiffness ratio of an equivalent flat clamp mechanism. Experiments also demonstrate that the proposed mechanism does not show the stick-slip phenomenon that exists in the flat clamp mechanism. Computational case studies were carried out to investigate the effects of the angle of the trapezoidal pin, the number of frames, the direction of the transverse force and the behavior at high deflections. Simulations show that the 30° trapezoidal pin has the highest stiffness for pressures larger than 500 kPa, three frames placed along the Laminar Jamming generate the maximum stiffness ratio, the stiffness slightly varies when the transverse force changes direction, and the stiffness decreases with increasing deflection. Full article
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