Results 51 to 60 of about 5,207 (292)

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Design and Analysis of Variable Flexible Actuator for Human-Robot Interaction

Xibei Gongye Daxue Xuebao, 2019
In view of the shortcomings of the traditional high-rigidity robots that can't ensure safety of human-robot interaction and the adaptability of complex environment, a variable stiffness flexible actuator is proposed for the robot joint based on the ...

doaj   +1 more source

A Magnetically-Actuated Coiling Soft Robot With Variable Stiffness

IEEE Robotics and Automation Letters, 2023
Soft and flexible magnetic robots have gained significant attention in the past decade. These robots are fabricated using magnetically-active elastomers, are capable of large deformations, and are actuated remotely thus allowing for small robot size. This combination of properties is appealing to the minimally invasive surgical community, potentially ...
Lloyd, Peter, Thomas, Theodosia Lourdes, Venkiteswaran, Venkatasubramanian Kalpathy, Pittiglio, Giovanni, Chandler, James H., Valdastri, Pietro, Misra, Sarthak, Lloyd, Peter Robert   +7 more
openaire   +4 more sources

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

Advanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang, Adrian Ehrenhofer, Thomas Wallmersperger   +2 more
wiley   +1 more source

Feedback linearization and simultaneous stiffness-position control of robots with antagonistic actuated joints.

, 2007
In this paper, the dynamic model of a robot with antagonistic actuated joints is presented, and the problem of full linearization via static state feedback is analyzed. The use of transmission elements with nonlinear relation between the displacement and
Hirzinger, Gerd, C. Melchiorri, M. Grebenstein, T. Wimbock, Palli, G., Grebenstein, Markus, MELCHIORRI, CLAUDIO, T. Wimboeck, Melchiorri, C., Wimböck, Thomas, G. Hirzinger, G. Palli, PALLI, GIANLUCA   +12 more
core   +1 more source

Improving the stiffness of mechanical layer jamming cable-driven soft actuators through design optimization and frame reinforcement

Mechanical Engineering Journal
Soft cable-driven actuators offer flexibility and adaptability but often lack stiffness, limiting their application in tasks requiring high load capacity. A variable stiffness mechanism has been developed to change the stiffness as needed to increase the
Chinvudh UAHCHINKUL, Satoshi MURAMATSU, Katsuhiko INAGAKI   +2 more
doaj   +1 more source

Soft Mechanical‐Electrical Logic Using Liquid Metal‐Filled 3D‐Printed Architectures

Advanced Engineering Materials, EarlyView.
We present 3D‐printed soft mechanical–electrical logic elements that use liquid metal–filled silicone tubes actuated by thermoplastic polyurethane/polylactic acid (TPU/PLA) architectures to produce Boolean operations. Complementary normally open and normally closed unit cells perform repeatable binary transitions and can be combined into more complex ...
Christoph Lehmann, Ryan Kalgreen, Laura M. Comella   +2 more
wiley   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Variable Stiffness Linear Actuator Based on Differential Drive Fiber Jamming

, 2023
Variable stiffness technologies have been widely adopted in soft robotics, also combining them with different actuation technologies and demonstrating the potential to increase the range of possible applications of soft systems, such as soft continuum ...
Lucrezia Lorenzon, Luca Arleo, Matteo Cianchetti   +2 more
core   +1 more source

Preliminary Design and Control of an Ankle Rehabilitation Robot With Variable Stiffness Actuator

IEEE Access
Intrinsic robotic compliance is crucial for enhancing the safety of physical human-robot interaction. This study proposes a variable stiffness ankle rehabilitation robot for rehabilitation training.
Laibin Luo, Zhe Wei, Yao Sun, Wenxin Zhang, Jie Zhou   +4 more
doaj   +1 more source