Article
Chemistry, Multidisciplinary
Zenghao Zhang, John T. Heron, Abdon Pena-Francesch
Summary: Magnetoactive soft materials are used in soft robotics for shape transformations under magnetic fields. However, they lack reconfigurability and repairability. This study develops magnetoactive soft composites with biopolymers and microparticles, allowing for on-demand reconfiguration and magnetic reprogramming. These composites demonstrate programmable deformation modes, self-healing properties, and shape-memory behavior, enabling the modular design of magnetic actuators with enhanced durability and versatility.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Elisabeth Rossegger, Rita Hoeller, Katja HrbiniC, Marco Sangermano, Thomas Griesser, Sandra Schloegl
Summary: Magnetoresponsive polymers are important materials in the design of soft actuators, allowing for controlled movement through an external magnetic field. By incorporating magnetoresponsiveness into photocurable resins, personalized and complex structures can be created and driven by a magnetic field using 3D printing technology.
ADVANCED ENGINEERING MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Jian Li, Nitesh Arora, Stephan Rudykh
Summary: Large deformations of soft materials can lead to various elastic instabilities, which are crucial in biology. The concept of instability-induced pattern transformations offers new possibilities for designing novel materials.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Dezhao Lin, Fan Yang, Di Gong, Zhihong Lin, Ruihong Li, Wenbo Qian, Chenghong Li, Sheng Jia, Hongwei Chen
Summary: This study introduces novel Magnetoactive Elastomers (MAEs) and drivers that can achieve the synchronous pumping behavior of heart and muscle extension behavior under applied homogeneous magnetic fields. These drivers can be excited by remote homogeneous magnetic fields and have great potential for applications in biomimetic or bioinspired soft driving systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Mechanics
Xiaocheng Hu, Heng Zhu, Shuo Chen, Honghui Yu, Shaoxing Qu
Summary: Soft magnetic membrane (SMM) is considered as a potentially functional component in various applications. In this study, SMMs composed of carbonyl iron powders (CIPs) and ECOFLEX-0030 matrix are fabricated and tested in a magnetic field. A simple but effective model for predicting the magnetomechanical response of SMMs is constructed, showing good agreement with experimental observations. The SMM with 15 vol% inclusion exhibits the largest deformability according to the results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Anil K. Bastola, Mokarram Hossain
Summary: Magnetoactive soft materials (MSMs) are emerging as a promising class of smart materials with applications in artificial muscles, soft robotics, drug delivery, surgery, and metamaterials. They offer advantages such as remote actuation, high strain and strain rate, self-sensing, and fast response, making them ideal for shape morphing, dynamic locomotion, and reconfigurable structures. This review article provides a comprehensive overview of MSMs and discusses future perspectives for developing multifunctional magnetoactive devices.
MATERIALS & DESIGN
(2021)
Article
Engineering, Multidisciplinary
Wei Chen, Lin Wang, Zhi Yan
Summary: Recently, a new type of magnetoactive soft materials, called hard-magnetic soft (HMS) materials, was manufactured by embedding hard-magnetic microparticles into a soft matrix. The mechanical responses of HMS structures, especially the static deformations of initially straight HMS beams, have received significant attention due to their potential applications in soft robotics, flexible electronics, and biomedicine. However, it is also important to investigate the dynamical behaviors of HMS beams to fulfill their potential applications. In this study, a large-deformation dynamical model of curved HMS beams actuated by a harmonically rotational magnetic field was developed and solved analytically and numerically. It was found that the curved HMS beam tends to align with the applied constant magnetic field and exhibits periodic vibrations when subjected to a periodically rotational magnetic field. Moreover, when the rotational frequency of the magnetic field is close to the natural frequency of the beam, the system resonates and the vibration amplitude of the curved beam becomes extremely large.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Physics, Multidisciplinary
Shaker Mahmood Rasheed, Hajar F. Ismael, Nehad Ali Shah, Sayed M. Eldin, Hasan Bulut
Summary: This paper studies pattern formation for a reaction-diffusion model with nonlinear reaction terms using a semi-implicit second-order difference method in one dimension. Different types of traveling wave solutions and their stability near steady states are investigated. The study also uses COMSOL Multiphysics software to demonstrate pattern formations and shows theoretical regions where patterns can be found depending on diffusion coefficients and wave number.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Materials Science, Multidisciplinary
Dirk Romeis, Marina Saphiannikova
Summary: In this study, an effective macro-continuum model for describing macroscopic samples made of composite materials with magnetizable inclusions is derived. The model takes into account the properties and microscopic arrangement of the distinct phases. The derived expressions are shown to be accurate and in good agreement with existing experimental data.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jingze Xue, Zhuangzhuang Tian, Xinze Xiao, Chuankai Du, Shichao Niu, Zhiwu Han, Yan Liu
Summary: This research aims to develop a manufacturing process that offers extensive programmability and exceptional actuation capabilities for soft actuators. Inspired by small organisms, a novel soft actuator with uniformly dispersed ferromagnetic microparticles and programmatic magnetic profile distribution is proposed. It can achieve reversible, remote, and fast programmable shape transformation and controllable movement even in a low magnetic field. The actuator can be applied to manipulate both solid and liquid media, and it has potential applications in intelligent sensors, disaster rescue, and wearable devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Erik Poloni, Ahmad Rafsanjani, Vadim Place, David Ferretti, Andre R. Studart
Summary: Architectured composites have been developed to exhibit orientation-dependent color changes under ambient light with minimum power input, by rotating reflective coated platelets embedded in a soft polymer matrix. This concept of strain-induced architectured color could be utilized to create low-power smart stretchable displays, tactile synthetic skins, and autonomous soft robotic devices with fast and reversible color changes through mechano-optic coupling within their soft composite architecture.
ADVANCED MATERIALS
(2022)
Article
Engineering, Mechanical
Nidhish Jain, Jongmin Shim
Summary: This study investigates the mechanisms of compression-driven pattern transformations in 2-D soft granular crystals using numerical analysis and model construction. The results show a close relationship between pattern transformations and instability. The study also confirms the effectiveness of the simplified model.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Mouad Boudina, Frederick P. Gosselin, Stephane etienne
Summary: Soft corals, such as Antillogorgia bipinnata, are colony building animals that feed by catching food particles brought by currents. Vibrations induced by VIVs can significantly enhance their ability to capture food particles, leading to up to 40% more particles being captured compared to fixed state.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Alexander Kovalev, Inna A. Belyaeva, Christian von Hofen, Stanislav Gorb, Mikhail Shamonin
Summary: This study investigates the effect of a moderate magnetic field on the work of adhesion of mechanically soft magnetoactive elastomer samples. The results show that the magnetic field increases the adhesion on the particle-enriched side, while it has no effect on the particle-depleted side. These findings are relevant for the development of magnetically controllable soft robots.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Joshua Furer, Pedro Ponte Castaneda
Summary: This work focuses on the stability and macroscopic response of soft magnetoelastic composites under magnetic and mechanical loading. By investigating the formation of twinned domains, the study explores the onset of instabilities and the resulting macroscopic response. The research findings reveal that the formation of lamellar domains leads to a softer mechanical response, which offers new strategies for the design of magnetoactive elastomer sensors and actuators.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Jian Li, Mrityunjay Kothari, S. Chockalingam, Thomas Henzel, Qiuting Zhang, Xuanhe Li, Jing Yan, Tal Cohen
Summary: This paper highlights the significant contribution of J.D. Eshelby to the study of mechanical behavior of materials, discussing the theoretical foundation of elastic stress and strain fields as well as their application in material deformation and reorganization processes. Experimental observations of key morphogenesis steps in biofilm growth are used to obtain approximate equilibrium solutions through two different methods, shedding light on the natural growth paths under confinement conditions.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Chemistry, Physical
Jian Li, Viacheslav Slesarenko, Stephan Rudykh
Summary: The study discovered that in the unexplored field of soft heterogeneous composites, a non-dilute stiff phase can lead to the formation of instability-driven domains that are energetically favorable over wrinkling. By introducing a closed-form analytical expression to predict the evolution of the patterns and altering material compositions, various patterns can be pre-designed.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Vincent W. Chen, Nitesh Arora, Artemii Goshkoderia, Carson L. Willey, Zafer Turgut, Philip R. Buskohl, Stephan Rudykh, Abigail T. Juhl
Summary: Magnetorheological elastomers (MRE) have the ability to change shape and properties under the influence of an external magnetic field. This study investigates the buckling behavior of a composite system consisting of a magnetoactive layer embedded into an inactive elastomeric matrix. The critical buckling strain is highly tunable by the applied magnetic field and the composite exhibits well-developed controllable wavy patterns in the post-buckling regime.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Dean Chen, Nitesh Arora, Yuhai Xiang, Jian Li, Viacheslav Slesarenko, Stephan Rudykh
Summary: This study investigates elastic instabilities in soft particulate composites under finite strains, revealing distinct instability modes such as strictly doubled periodicity, seemingly non-periodic state, and longwave pattern. The research focuses on the mechanisms leading to different instability modes, particularly the seemingly non-periodic one.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Civil
Jialin Li, Guangjun Gao, Yao Yu, Jian Li
Summary: This study presents a three-dimensional scaled similitude rule for train collision and verifies it through establishing a simulation model. By multiplying the scale factors, the dynamic responses of the scaled model are identical to that of the full-scale model. This rule can guide scaled model tests in laboratory.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2023)
Article
Multidisciplinary Sciences
Hasan B. B. Al Ba'ba'a, Carson L. Willey, Vincent W. W. Chen, Abigail T. Juhl, Mostafa Nouh
Summary: This paper investigates the vibrational spectrum of finite phononic crystals in the form of one-dimensional rods and explains the factors that contribute to the origination of truncation resonances. By identifying a unit cell symmetry parameter, a family of finite phononic rods is defined. A transfer matrix method is utilized to derive closed-form expressions of the characteristic equations governing the natural frequencies and decipher the truncation resonances. This study establishes concrete connections between the localized vibrations, boundary conditions, and the configuration of the truncated chain, providing tools for predicting, tuning, and selectively designing truncation resonances.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Engineering, Multidisciplinary
Yuhai Xiang, Dean Chen, Nitesh Arora, Qi Yao, Stephan Rudykh
Summary: This study investigates the relationship between viscoelasticity and instabilities in soft particulate composites undergoing finite deformation. The composite experiences microstructural buckling upon exceeding the critical strain level, and the critical strain and wavelength depend on the applied strain rate. Different buckling patterns can be activated by changing strain rates, and the space of admissible buckling modes widens in composites with higher instantaneous shear modulus. Experimental results validate the ability of the numerical model to predict critical buckling characteristics.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Jian Li, Hannah Varner, Tal Cohen
Summary: The necking instability is a precursor to tensile failure and rupture of materials. It can exhibit periodic necking and fragmentation when confined to a substrate or embedded in a matrix. Necking in hyperelastic materials is not well understood, but there has been a renewed interest in its role for the advancement of fabrication processes and to explain fragmentation phenomena.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Mohammad Rauf Sheikhi, Selim Guergen, Jian Li, Mehmet Alper Sofuoglu, Mahdi Hasanzadeh, Melih Cemal Kushan, Zhenmao Chen
Summary: This study explores a new concept of integrating multi-functional shear thickening fluids (M-STFs) into sandwich structures to enhance vibration damping. The results show that gradually adding multi-walled carbon nanotubes (MWCNTs) to the fluid significantly improves its electrical resistance and rheological properties. Furthermore, the integration of M-STFs into the sandwich structures effectively increases the damping ratio and stiffness coefficient.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Carson L. Willey, Caleb J. Barnes, Vincent W. Chen, Kevin Rosenberg, Albert Medina, Abigail T. Juhl
Summary: This paper presents progress in developing a passive boundary layer transition delay strategy using a phononic subsurface (PSub). High-order implicit large-eddy simulation (ILES) was utilized to study the control requirements for boundary layer transition delay. The results showed that positive phasing of surface displacement relative to Tollmien-Schlichting wave forcing effectively attenuates instability. A multi-input, multi-output (MIMO) PSub was developed and demonstrated positive phasing and a small degree of passive transition delay on a flat plate boundary layer. Further optimization of subsurface properties and device placement is expected to improve controller efficacy.
JOURNAL OF FLUIDS AND STRUCTURES
(2023)
Article
Engineering, Civil
Yao Yu, Xiaobo Gong, Jialin Li, Guangjun Gao, Jian Li
Summary: This paper presents a novel multi-cell tube energy absorption structure made of aluminum alloy for ultra-large energy absorption field. The proposed structure has the advantages of low cost, large size, light weight, high energy absorption capacity, and large crushing force. Experimental and simulation results demonstrate its feasibility and superior performance. This structure can be applied to ultra-large energy absorption fields such as train crashworthiness protection.
Article
Acoustics
L. Katch, M. Moghaddaszadeh, C. L. Willey, A. T. Juhl, M. Nouh, A. P. Arguelles
Summary: Phononic crystals can develop defects during manufacturing that alter the desired dynamic response and bandgap behavior. This study uses two models to investigate the behavior of defective square unit cells and successfully predicts the impact of defects on the phononic crystal.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
