Article
Materials Science, Multidisciplinary
Cedric Gourdin, Gregory Perez, Hager Dhahri, Laurent De Baglion, Jean-Christophe Le Roux
Summary: This paper introduces a new device, FABIME2e, developed for quantifying the effect of a PWR environment on disk specimens, combining structural effects and environmental penalty effects.
Article
Polymer Science
Thanh-Tam Mai, Kenji Urayama
Summary: The study characterized the strain energy release rate and local crack-tip strain field of elastic hydrogels under different biaxial loading conditions using two approaches. The results showed reliability in determining G values and revealed that the properties are governed exclusively by G, independent of the biaxial loading type. These findings provide an important basis for understanding the fracture behavior of elastic soft materials under complex deformations.
Article
Mechanics
M. Rambausek, K. Danas
Summary: This work investigates the primary sinusoidal bifurcation wrinkling response of single- and multi-layered magnetorheological elastomer film-substrate systems subjected to combined transverse applied magnetic fields and in-plane biaxial pre-compression. A continuum model is employed to analyze the effect of magnetic properties on the system's response, leading to the discovery that topologies resembling closely the monolayer one have the lowest critical magnetic fields under given biaxial pre-compression.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Barna Szabo, Ricardo Actis, David Rusk
Summary: The study focused on improving the prediction of high-cycle fatigue failure initiation by modifying the predictor to account for biaxial out-of-phase loading, and validated the new model through three biaxial out-of-phase fatigue tests.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Amit Vikram Rex, Surajit Kumar Paul, Akhilendra Singh
Summary: The present study investigates the impact of different tensile pre-straining on the mechanical properties and fatigue life of AA2024-T4. Pre-strained specimens exhibit increased ultimate tensile strength and yield stress, reduced ductility, and a significant enhancement in fatigue performance.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Markus Haertel, Christian Illgen, Tobias Panzner, Enrico Bruder, Stefan Schmaltz, Steven Van Petegem, Kai Willner, Karsten Durst, Helena van Swygenhoven, Martin F. -X. Wagner
Summary: This research investigates the Bauschinger effects in sheet metal DC06 under equi-biaxial loading conditions. The results show that the material exhibits distinct Bauschinger effects when subjected to equi-biaxial load path changes, which differ from similar observations under uniaxial loading. These effects can be explained by considering the evolution of dislocation densities and the formation of substructures, as well as the influence of residual stresses.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Analytical
Jakub Bernat, Piotr Gajewski, Rafal Kapela, Agnieszka Marcinkowska, Paulina Superczynska
Summary: This paper presents the potential of magnetorheological elastomers in soft robotics and provides a detailed description of the construction process for a soft gripper assembled with magnetorheological elastomers. The electromechanical properties of magnetorheological elastomers are also analyzed through experiments.
Article
Engineering, Mechanical
Abhay K. Singh, Siddhant Datta, Aditi Chattopadhyay, Nam Phan
Summary: The investigation explored the effects of overload mode-mixity on crack growth behavior and micro-mechanisms of AA7075 T6, revealing an increase in fatigue life and crack retardation under mix-mode overload conditions. Microscale analysis showed distinct fracture features in different overload regions.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Characterization & Testing
Qiang Lin, Yihao Yao, Gang Chen, Xu Chen, Shouwen Shi
Summary: A customized pressure-loaded blister test device was developed to investigate the biaxial fatigue durability of PEM for fuel cells. The study found that increasing pressure and temperature, as well as decreasing humidity, adversely affected the biaxial fatigue lifetime of the membrane. Lowering temperature also led to a transition in the failure mode.
Article
Materials Science, Composites
Leilei Xia, Zhijian Hu, Lizhi Sun
Summary: The mechanical properties of magnetorheological elastomers (MREs) play a crucial role in their engineering applications. This study proposes a computational micromechanics-based multiphysics coupling model to reveal the overall magneto-hyperelastic properties of MREs. The effects of demagnetizing field and microstructures on the overall magnetic stresses are emphasized.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Jiangtao Zhang, Yanliang Qiao, Mei Zhang, Pengcheng Zhai
Summary: The study aimed to test and model the magnetorheological properties of isotropic magnetorheological elastomers under coupled static-dynamic compressive loads. The results showed that particle content, strain amplitude, and pre-strain have significant effects on the MR properties.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Hamed Saeidi Googarchin, Mohammad Hassan Shojaeefard, Seyyed Mohammad Hosseini, Isa Banagar
Summary: This study investigates the prediction of fatigue life of magnetorheological elastomers (MREs) with different volumes of carbonyl iron particles (CIPs) and various external magnetic fields. A novel three-dimensional constitutive magneto-hyper-viscoelastic semi-coupling model based on strain energy density function (3DSED) is proposed, and experimental and numerical analysis is conducted to analyze the fatigue behavior of MREs enhanced structures. The results show that the 3DSED model can accurately predict the fatigue life of MREs subjected to complex and repetitive loading.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2022)
Article
Nanoscience & Nanotechnology
Ludovico Cestarollo, Shane Smolenski, Amal El-Ghazaly
Summary: Haptics enables tactile interactions between humans and digital interfaces. Magnetorheological elastomers (MREs) have the potential to create a tactile interface that can recreate 3D shapes sensed by touch. By using nanoparticles instead of microparticles, MREs can achieve higher deflection and performance. Isotropic MREs with soft magnetic nanoparticles show better performance due to the soft magnetic nature of the nanoparticles. On the other hand, anisotropic MREs with larger particles can achieve greater deflection.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Leone Costi, Antonia Georgopoulou, Somashree Mondal, Fumiya Iida, Frank Clemens
Summary: Magnetorheological elastomers (MREs) are smart materials that exhibit magnetorheological and piezoresistive effects. This study presents the development of a 3D printable self-sensing MRE with significant magnetoresistive and piezoresistive changes.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Elten Polukhov, Marc-Andre Kelp
Summary: The study analyzes instability phenomena of periodic magnetorheological elastomers using computational homogenization, focusing on macroscopic material and microscopic structural instabilities. Instabilities at both scales are detected by superimposing wave-like perturbations, with the definition of a generalized acoustic tensor at the macroscopic scale and determination of critical buckling modes at the microscopic scale using Bloch-Floquet wave analysis. The complex pattern transformations revealed through numerical simulations could be triggered by appropriate microstructure design and coupled magneto-mechanical loading.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Analytical
Caoimhe Ni Neill, Merve Akdag, Anthony J. Betts, John F. Cassidy
Summary: In this study, bromocresol purple was utilized as a sensor for ammonia, with a simple layer spincoated on an acetate sheet exhibiting reversible response to low concentrations of ammonia in the presence of water vapor.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yanfen Zhou, Wenyue Li, Lele Li, Zhenhua Sun, Liang Jiang, Jianwei Ma, Shaojuan Chen, Xin Ning, Feng-Lei Zhou
Summary: By combining polydopamine modification and electroless silver plating, flexible and highly conductive meta-aramid (PMIA) nonwoven fabrics were fabricated with enhanced EMI shielding effectiveness and electrical conductivity.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Instruments & Instrumentation
Yuhao Wang, Yanfen Zhou, Wenyue Li, Zhanxu Liu, Bangze Zhou, Shipeng Wen, Liang Jiang, Shaojuan Chen, Jianwei Ma, Anthony Betts, Stephen Jerrams, Fenglei Zhou
Summary: EHD 3D printing was utilized to fabricate SR/CuPc composite films, resulting in high dielectric constant and electromechanical stability, demonstrating considerable potential for fabricating high-performance DE films.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Manufacturing
Liang Jiang, Yuhao Wang, Xueqin Wang, Fanggang Ning, Shipeng Wen, Yanfen Zhou, Shaojuan Chen, Anthony Betts, Stephen Jerrams, Feng-Lei Zhou
Summary: Inspired by the architecture of the human eye, a tunable optical lens with a fully 3D printed inhomogeneous structure was successfully fabricated, exhibiting a 29% change in focal length under dynamic driving voltage control. The lens displayed excellent stability when the focal length was tuned for 200 cycles, mimicking the auto adjusting principle of the human eye and showing potential applications in various fields such as imaging and bifocal technology.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Zhanxu Liu, Bangze Zhou, Chenchen Li, Yuhao Wang, Shipeng Wen, Yanfen Zhou, Liang Jiang, Fenglei Zhou, Anthony Betts, Stephen Jerrams
Summary: In this study, a 3D additive processing technology called electrohydrodynamic (EHD) printing was used to fabricate dielectric elastomer (DE) films using styrene-ethylene-butylene-styrene (SEBS) inks with added titanium dioxide (TiO2) nanoparticles modified with walnut polyphenols. The printed films showed improved dispersibility of TiO2 nanoparticles in the SEBS matrix and excellent mechanical, dielectric, and electromechanical properties. Among the DEs fabricated, the SEBS/10%wp-TiO2 composite exhibited a maximum actuated area strain of 21.5% at an electric field of about 34.0 V/μm without degradation of other properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Materials Science, Textiles
Li Chang, Chuanfen Wu, Pengfei Lan, Bing Bai, Liang Jiang, Shaojuan Chen, Stephen Jerrams, Jianwei Ma
Summary: Blends of polypropylene and styrene-ethylene/butylene-styrene copolymer were successfully used to produce elastic melt-blown nonwovens with high elongation and elastic recovery, while maintaining fine fiber diameters and good filtration properties. The blends displayed a co-continuous structure when the ratio of SEBS to PP was similar, showing good spinnability during rheological and thermal properties tests.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Materials Science, Composites
Bangze Zhou, Chenchen Li, Yanfen Zhou, Zhanxu Liu, Xue Gao, Xueqin Wang, Liang Jiang, Mingwei Tian, Feng-Lei Zhou, Stephen Jerrams, Jianyong Yu
Summary: The newly developed pressure sensor material shows excellent piezoelectricity and piezoresistivity, making it suitable for monitoring subtle pressure changes and finger movements, demonstrating great potential for applications.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Yajie Zhang, Chenchen Li, Bangze Zhou, Haotian He, Yanfen Zhou, Liang Jiang, Feng-Lei Zhou, Shaojuan Chen
Summary: In this study, a flexible strain sensor with excellent mechanical and electrical properties was fabricated using a nanofibrous membrane. By improving the deposition technique and optimizing the material ratio, the efficiency and stability of the sensor were enhanced. The sensor showed a wide working range and a high-gauge factor, and exhibited good performance in multiple tensile loading-unloading cycles and monitoring bending motions in the human body.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Bangze Zhou, Chenchen Li, Zhanxu Liu, Xiaofeng Zhang, Qi Li, Haotian He, Yanfen Zhou, Liang Jiang
Summary: In this work, a highly stretchable and sensitive strain sensor based on electrospun styrene-ethylene-butene-styrene copolymer (SEBS) yarn modified by dopamine (DA) and coated with multi-walled carbon nanotubes (MWCNTs) was reported. The strain sensor exhibited excellent stability, repeatability, and durability, and showed superior sensing performance in monitoring joint motions of the human body.
Article
Chemistry, Multidisciplinary
Zhanxu Liu, Chenchen Li, Xiaofeng Zhang, Bangze Zhou, Shipeng Wen, Yanfen Zhou, Shaojuan Chen, Liang Jiang, Stephen Jerrams, Fenglei Zhou
Summary: This study synthesized a biodegradable polyurethane and processed it with carbon nanotubes into composite fibers for strain sensors. Compared to sensors made from other materials, these polyurethane fibers have a wider strain-sensing range and higher sensitivity, while maintaining reliable stability. This is important for the development of biodegradable wearable electronic devices.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Chenchen Li, Bangze Zhou, Yanfen Zhou, Jianwei Ma, Fenglei Zhou, Shaojuan Chen, Stephen Jerrams, Liang Jiang
Summary: This study successfully developed a highly flexible strain sensor based on electrospun thermoplastic polyurethane (TPU) fibrous tubes coated with carbon nanotubes (CNTs). The strain sensors demonstrated a wide sensing range, high linearity, and high sensitivity, allowing for accurate monitoring of both large and small human body motions.
Article
Polymer Science
Li Chang, Yanfen Zhou, Kun Dai, Liang Jiang, Stephen Jerrams, Jianwei Ma, Shaojuan Chen
Summary: An elastic masterbatch and elastic melt blown nonwovens were prepared using SEBS and PP blend. The study investigated the phase separation morphology, rheological properties, and crystal structure of the elastic masterbatch. Results showed that a compatible structure was achieved in the blend, with SEBS network structure restricting the crystallization of PP. The study also examined the relationship between process parameters and properties of the elastic nonwoven, finding that air pressure and DCD affected fiber diameter and bonding, with DCD having a greater impact on elastic recovery.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Textiles
Lele Li, Dongliang Li, Baojie Sun, Yanfen Zhou, Jianwei Ma, Shaojuan Chen, Liang Jiang, Feng-Lei Zhou
Summary: In this study, a flexible strain sensor based on SEBS/CNTs composite fiber with both electrical conductivity and high stretchability was fabricated. The strain sensing behavior of the sensor was investigated by varying the CNTs content, and it was found that the fiber with 7 wt% CNTs content exhibited the highest strain sensing capability, with the ability to sense strains as high as 500.20%.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Chemistry, Multidisciplinary
Sean Tobin, John Cassidy, Kevin Kurian, Anthony Betts
Summary: Ascorbic acid (AH(-)) degrades in deionised water through oxidation by oxygen in the presence of copper(II), with reaction rate directly proportional to the copper(II) concentration. At a higher pH (7.4), the reaction becomes pseudo-first order and the rate increases linearly with copper(II) concentration at a micromolar level. Monitoring of AH(-) levels or dissolved oxygen concentration can be a useful method for determining trace copper(II) levels.
AUSTRALIAN JOURNAL OF CHEMISTRY
(2022)
