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Article
Engineering, Electrical & Electronic
Mohammadreza Lalegani Dezaki et al.
Summary: Magnetorheological elastomer (MRE) composite actuators have the advantages of remote control, swift movement, adaptation to rough surfaces, and secure interaction with humans. This paper proposes a new conceptual design for bi-stable MRE-based electroactive composite actuators with high performance by combining MRE composites and 4D printing of conductive shape memory polymers. Experimental results demonstrate the immense potential of the developed composite actuators as mechanical and biomedical devices.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Fangfang Wang et al.
Summary: This article proposes an efficient and economical 4D printing method that allows for prompt shape change under heat stimulus. By optimizing FDM processing parameters, complex 3D structures with flexibility and high fidelity can be directly constructed, significantly reducing construction time and process complexity.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Armin Yousefi et al.
Summary: This article introduces novel 3D bio-inspired auxetic meta-structures that are printed with soft/hard polymers for energy absorption/dissipation applications. The feasibility and mechanical performance of these structures are assessed experimentally and numerically, demonstrating unique features such as large recoverable deformations, stress softening, and high energy absorption/dissipation capacity. The results are expected to be instrumental in the design of 3D printed devices with tunable soft and hard materials for high energy absorption/dissipation applications.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mohammadreza Lalegani Dezaki et al.
Summary: This article demonstrates the engineering of soft pneumatic actuators (SPAs) with different behaviors by changing 3D printing parameters and using bio-inspired lattice chambers. The effects of material flow and nozzle temperature parameters on the material properties and stiffness are studied. Lattices, such as auxetic, columns, face-centered cubic, honeycomb, isotruss, oct vertex centroid, and square honeycomb, are designed to investigate the actuators' behaviors under the same input pressure.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Instruments & Instrumentation
Ramin Hamzehei et al.
Summary: This study introduces a novel type of two-dimensional graded metamaterials with zero Poisson's ratio for energy absorption applications. Inspired by the 2D image of a DNA molecule, these metamaterials are designed with re-entrant unit cells that result in a zero Poisson's ratio behavior. The energy absorption capacity of the metamaterials is enhanced by incorporating slots and horizontal beams, taking inspiration from the DNA molecule's base pairs.
SMART MATERIALS AND STRUCTURES
(2022)
Review
Chemistry, Multidisciplinary
Jixiang Qi et al.
Summary: Active mechanical metamaterials combine mechanical metamaterials with smart materials for superior performance, with structures designed based on principles such as phase transition and strain mismatch. External stimuli like temperature, chemicals, and light are used for control and efficiency.
Article
Robotics
Dohgyu Hwang et al.
Summary: This multifunctional shape-morphing material combines elastomeric kirigami with an unconventional reversible plasticity mechanism in metal alloys to rapidly morph flat sheets into complex, load-bearing shapes, with reversibility and self-healing through phase change. It overcomes trade-offs in deformability and load-bearing capacity, and eliminates power requirements to sustain reconfigured shapes.
Article
Materials Science, Multidisciplinary
Junghan Kwon et al.
Summary: This paper proposes a mechanism for selectively stiffening garments (SSGs) using sandwich-structured composites with anisotropic cellular cores and rubber-laminated face sheets. The mechanism provides high compliance for conformity to the wearer's body when unjammed, and high force density when jammed, allowing for adjustable mechanical properties. Various designs of the sandwich jamming structures for the SSGs are introduced with analytical characterizations and experimental validations, demonstrating potential applications for force and motion assistance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Ebrahim Yarali et al.
Summary: Magneto-/ electro-responsive polymers (MERPs) are stimuli-responsive materials that exhibit multifunctional and dynamic properties when triggered by external magnetic/ electric fields. They have great potential in biomedical engineering, soft matter engineering, and the design of smart materials. Current research focuses on manufacturing methods, characterization techniques, and applications of MERPs in various fields.
APPLIED MATERIALS TODAY
(2022)
Article
Engineering, Mechanical
Ji Luo et al.
Summary: Soft robots are more advantageous in grasping irregularly shaped or fragile objects than traditional rigid robots due to their high compliance and adaptiveness. The self-stable property of the dual-chamber structure enables soft robots to maintain bending deformation without input stimuli, significantly improving energy efficiency. By developing a soft self-stable actuator (SSSA) driven by a tendon, the actuator can achieve self-stability without energy consumption, reducing energy consumption by approximately 45%.
Article
Engineering, Electrical & Electronic
Muhammad Yasir Khalid et al.
Summary: Four-dimensional (4D) printing involves the formation of complex structures that can transform into different shapes upon exposure to environmental stimuli. It is a promising approach to generate intricate structures for various fields such as biomedical, food, electronics, textile, and agriculture. Recent advancements in 4D printing of soft robotics, actuators, and grippers are summarized, including novel robotics technologies and materials. The applications of shape-memory polymers, hydrogels, and liquid crystal elastomers-based 4D-printed soft and intelligent robots are highlighted. Challenges and possible remedies for the utilization of 4D-printed soft robotics are also discussed.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Mohammadreza Lalegani Dezaki et al.
Summary: The magneto-responsive shape memory polyurethane (SMP) foam composites offer high stability and reversibility, as determined by experimental studies. A workable, light, stable, and soft composite gripper with programmable magnetic patterns has been created for activities like grabbing, holding, and moving objects in horizontal and vertical directions. The use of SMP foam increases stability and lifting capacity compared to traditional magnetic elastomers.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Instruments & Instrumentation
Mohammadreza Lalegani Dezaki et al.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Instruments & Instrumentation
Ali Zolfagharian et al.
Summary: Four-dimensional printing has opened up possibilities for soft robotics. This study introduces a novel technique to produce a light and cost-effective soft parallel manipulator with customizable actuator design. Instead of conventional rigid actuators, silicon-based soft actuators are used to drive the robot using simple heating. The performance and workspace of the robot are analyzed through finite element modeling and MATLAB simulations. Experimental fabrication and testing have been conducted to validate the mechanism.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Yanlin Cao et al.
Summary: This article reports a novel soft actuator fabricated by 3D printing parallel strips on a thin film. Multiple configuration transitions were observed when the actuator swells, and the mechanisms were investigated and verified through experiments, analysis, and simulation. This work contributes to the fundamental understanding and innovative design of soft actuators.
Review
Chemistry, Physical
Xiaoxiao Dong et al.
Summary: Compared to traditional rigid-bodied robots, soft robots have flexibility and adaptability, enabling complex interactions with humans, other organisms, and non-ideal environments. This article summarizes the fabrication methods, driving strategies, applications, and future trends of soft robots, as well as discusses challenges and perspectives.
Article
Chemistry, Physical
Nick Willemstein et al.
Summary: This study proposes a method called InFoam, which utilizes liquid rope coiling to print structures with graded porosity. The method achieves a wide range of porosity gradients and allows for programming the behavior of actuators by adjusting porosity.
Article
Robotics
Michele Ibrahimi et al.
Summary: Changing the pressure of different inflatable chambers can effectively modulate the shape and stiffness of a device, showing potential applications in robotics and wearable robotics.
Article
Instruments & Instrumentation
Yao Shengda et al.
Summary: This study successfully captures the energy characteristics of fiber-reinforced fluidic soft actuators through developing an energy analytical model and experimental validation, providing important reference for the energy requirement and power system design of soft robots.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Buse Aktas et al.
Summary: Jamming is a structural phenomenon that provides tunable mechanical behavior by increasing kinematic and frictional coupling under pressure gradients, leading to altered mechanical properties. Engineers have utilized jamming to build various devices and this study offers a framework for designing jamming structures, comparing force-deflection behavior of different types and introducing methods to expand design space. Parameters for designing, fabricating, and actuating jamming structures are described along with their effects on functional metrics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Engineering, Mechanical
Mohammadreza Lalegani Dezaki et al.
Summary: This study reviews research on process optimisation and machine development in FDM to enhance final product quality. Findings suggest that selecting appropriate process parameters can optimize printing results, eliminate defects, and produce high-quality final products. Discussing printing various materials and improving machines will benefit future research in the field.
RAPID PROTOTYPING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Yuan-Fang Zhang et al.
Summary: This study introduces a novel 4D printing approach by fabricating stretchable heating circuits with fractal motifs, allowing seamless integration with SMP components. The method offers efficient and uniform heating performance by adjusting parameters, while maintaining stability of the circuits under stretching.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Bilige Yang et al.
Summary: The emerging generation of robots composed of soft materials aims to mimic biological motor adaptation skills through shape-shifting, with traditional strain limiters presenting limitations. The proposed jamming fiber technology can locally limit surface tensile strains, allowing for multiple programmable deformations and scalability in interacting with unstructured environments.
Article
Multidisciplinary Sciences
Yifan Wang et al.
Summary: The study presents a structured fabric with tunable bending modulus made up of three-dimensional particles arranged into layered chain mails. When pressure is applied at their boundaries, the particles interlock and jam the chain mails, resulting in a dramatic increase in bending resistance. This property is due to the high tensile resistance of the interlocking particles, providing potential for lightweight, tunable and adaptive fabrics for various applications.
Proceedings Paper
Automation & Control Systems
Wen-Bo Li et al.
Summary: This paper introduces a variable curvature jamming (VCJ) mechanism for amplifying laminar jamming structures, which significantly enhances stiffness and load capacity of actuators. The bidirectional stiffness behaviors of the VCJ actuators with different design parameters are experimentally studied and analyzed, showing a significant increase in stiffness compared to the traditional laminar jamming mechanism.
2021 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION (ICRA 2021)
(2021)
Article
Chemistry, Physical
Yang Cao et al.
Summary: This article presents a new method for fabricating soft electrothermal actuators using EHD printing for direct patterning of the resistive heater. By changing the design of the heating pattern on the actuator, complex programmable deformations can be achieved, including uniform bending, customized bending, folding, and twisting. Finite element analysis was used to validate the thermal distribution and deformation for different actuator designs, and several integrated demonstrations were presented, showcasing complex structures achieved from folding, a two-degree-of-freedom soft robotic arm, and soft walkers.
Article
Engineering, Mechanical
M. Bodaghi et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Engineering, Mechanical
Yuan Gao et al.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2020)
Review
Chemistry, Multidisciplinary
Jasper Delaey et al.
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Yangqiao Lin et al.
ADVANCED FUNCTIONAL MATERIALS
(2020)
Review
Engineering, Mechanical
Seth G. Fitzgerald et al.
Article
Engineering, Multidisciplinary
Ran Tao et al.
COMPOSITES PART B-ENGINEERING
(2020)
Article
Computer Science, Information Systems
Lucas Gerez et al.
Article
Mechanics
Ran Tao et al.
COMPOSITE STRUCTURES
(2020)
Article
Computer Science, Artificial Intelligence
Xiangxiang Wang et al.
COGNITIVE COMPUTATION AND SYSTEMS
(2020)
Article
Chemistry, Physical
Caixia Yang et al.
Article
Chemistry, Multidisciplinary
Antoine Le Duigou et al.
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Fabian Meder et al.
ADVANCED MATERIALS
(2019)
Review
Materials Science, Multidisciplinary
Wenwang Wu et al.
MATERIALS & DESIGN
(2019)
Article
Chemistry, Multidisciplinary
Yashraj S. Narang et al.
ADVANCED FUNCTIONAL MATERIALS
(2018)
Article
Engineering, Electrical & Electronic
Ali Zolfagharian et al.
SENSORS AND ACTUATORS A-PHYSICAL
(2018)
Article
Robotics
Yashraj S. Narang et al.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2018)
Article
Materials Science, Multidisciplinary
M. Bodaghi et al.
MATERIALS & DESIGN
(2017)
Review
Multidisciplinary Sciences
Daniela Rus et al.
Article
Robotics
Michael Wehner et al.
Article
Robotics
B Vanderborght et al.
INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH
(2006)
