Article
Chemistry, Physical
Shin Horiuchi, Yida Liu, Takeshi Hanada, Haruhisa Akiyama
Summary: A simple steam treatment can enhance the bonding strength between aluminum substrate and epoxy adhesives by inducing diffusion of adhesive molecules into nanopores of the aluminum surface and forming weak acid-base interactions.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Qiang Gao, Xixi Su, Peng Huang, Xi Sun, Zhanhao Feng, Guoyin Zu
Summary: The impact resistance of aluminum foam sandwich panels (AFS) with metallurgical bonding interfaces was studied. Low-velocity impact tests were conducted, and the energy absorption performance of AFS was evaluated. The results showed that the AFS exhibited three-stage characteristics under impact and had favorable energy absorption efficiency under low velocity.
Article
Materials Science, Multidisciplinary
Dema Ba, Qiansen Qiao, Changqing Li, Haichao Cui, Hao Zhang
Summary: In this study, the influence of low-temperature plasmas on the surface bonding performance of aluminum alloys was investigated through surface treatment. The optimized processing technology of low-temperature plasmas was determined using response surface method, and the interactivities of three factors with the surface energy of aluminum alloys were analyzed. The results showed that the treatment with low-temperature plasmas significantly improved the surface energy, wettability, tensile shear strength, and paint layer adhesion of aluminum alloy specimens by increasing the varieties and quantity of oxygen-containing functional groups on their surface.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Cong Chen, Hao Su, Xianheng Wang, Yan Liu, LeiYang Zhao, Xinqi Wei, Yuzhen Zhao, Jiacong Pan, Xinming Qiu
Summary: The impact-induced bonding can be a foundation for rapid solid-state additive manufacturing. However, the mechanisms behind this bonding process are not well understood due to the complexity caused by the transient process and extreme loading conditions. In this study, a novel impact-induced bonding process of copper flakes is reported, which has the advantages of longer duration, macroscopic length, and low ambient temperature. Finite element simulation and microstructure characterization reveal that the bonding strength can reach the strength of bulk material, and the embedding between microstructures and the recrystallization of grains are significant factors for impact-induced bonding.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Fatemehsadat Rahide, Krishnaveni Palanisamy, Jackson K. Flowers, Junjie Hao, Helge S. Stein, Christine Kranz, Helmut Ehrenberg, Sonia Dsoke
Summary: The naturally occurring amorphous Al2O3 film on an Al substrate poses a challenge for the performance of rechargeable Al batteries. This insulating Al oxide slows down electrode activation and hinders Al plating/stripping. The two sides of Al foils have different surface properties, with the non-shiny side having higher roughness and greater concentration of active sites. Various immersion pretreatments can modify the surface properties and create an interphase layer rich in Al, Cl, and N.
Article
Materials Science, Textiles
Ruosi Yan, Qianyu Zhang, Bao Shi, Shixin Liu, Zhigang Qin, Lixia Jia
Summary: This study investigated the low-velocity impact and interfacial bonding properties of weft-knitted ultra-high-molecular-weight-polyethylene (UHMWPE) filaments reinforced epoxy resin and vinyl ester resin composites. It was revealed that the composites with interlock air space stitch reinforcement exhibited the highest mechanical properties and puncture resistance. The tensile and flexural properties of the epoxy matrix composites were better than vinyl ester matrix composites, but their low-velocity impact resistance was slightly inferior. The interfacial bonding ability between vinyl ester resin and weft knitting structure reinforcement was stronger.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Polymer Science
Yanyan Lin, Huaguan Li, Zhongwei Zhang, Jie Tao
Summary: This study investigated the impact resistance of Al/Gf/PP laminates manufactured with modified aluminum alloy sheets under low-velocity impact. The results showed that the specimens treated with nitrogen plasma surface treatment exhibited higher energy absorption and impact resistance.
Article
Nanoscience & Nanotechnology
Yida Liu, Yuri Shigemoto, Takeshi Hanada, Takayuki Miyamae, Kazunori Kawasaki, Shin Horiuchi
Summary: Blending a small amount of maleic anhydride-grafted PP (PPgMA) with isotactic polypropylene (iPP) significantly improves the adhesive strength in direct melt bonding to aluminum. However, the effectiveness of PPgMA is limited and peaks at around 20 wt% PPgMA. The formation of a low-molecular-weight layer with low crystallinity at the interfacial region appears to be responsible for the enhanced adhesion strength.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Libo Men, Yilin Yu, Zhaoyang Hou, Xiao Li, Zhengjin Wang
Summary: This study investigates the cracking modes in layered hyperelastic structures composed of brittle films bonded to tougher substrates. It is found that surface cracks initially penetrate through the thickness of the film and are followed by crack channeling and interface debonding as stretch increases. The sequence of cracking modes is determined by the ratio of interfacial debonding energy to fracture energy of the film. This work establishes critical conditions for different cracking modes and provides a pathway to design cracking-resistant stretchable devices.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Peiyong Li, Li Chen, Yanqing Jiang, Hongyuan Wei
Summary: An advanced continuous resistance spot welding technology for large-area resin matrix composites and metal has been developed, which shows promising results in joint strength. The formation of C-O-metal bonds at the interface is identified as the key reaction mechanism.
Article
Engineering, Mechanical
Vivek Patel, Gaurav Tiwari, Ravikumar Dumpala
Summary: An experimental and numerical investigation was conducted to study the crashworthiness performance of layered frusta tube structures under axial impact loading. The study compared the failure modes and crashworthiness parameters of different multiwall frusta structures, and found that the three-layered frusta tube performed the best.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Materials Science, Composites
Mehmet Turan Demirci
Summary: This study investigates the impact of graphene nano platelets (GNPs) on the low-velocity impact (LVI) resistance of composite sandwich structures. The results show that composite materials doped with GNPs have improved impact resistance and reduced damage development.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
K. Ivanov, S. Razorenov, G. Garkushin
Summary: The study found that alumina nanoparticles tend to agglomerate in Al-based nanocomposites, with the size of agglomerates depending on the nanoparticle shape and number of ARB cycles. Introducing nanoparticles into aluminum helps in structural refinement, particularly in composites reinforced with separately distributed ball-shaped nanoparticles.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
Wenguang Ye, Yunyong Cheng, Hao Dou, Dinghua Zhang, Fuqiang Yang, Zhixiang Li, Wenfeng Cai
Summary: Continuous-carbon-fibre-reinforced (CCFR) honeycomb structures with self-sensing abilities were fabricated using 3D printing. The structures showed good performance in both low-velocity impact and compression after impact tests, indicating their potential for diverse applications.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Fengxuan Wang, Xiang Yang, Yongqiang Zhao, Jingmin Wu, Zhiyu Guo, Zhi He, Zhongchao Fan, Fuhua Yang
Summary: This study investigated the low-temperature direct bonding of SiC/Si through O-2 plasma activation. After optimization, a high bonding efficiency of over 90% was achieved. Surface activation was carried out through reactive ion etching (RIE) O-2 plasma without causing significant damage. A smooth and void-free interface was observed, along with a significant amorphous oxide layer. By increasing the annealing temperature, the thickness of the amorphous layer decreased significantly. The mechanism of SiC/Si low-temperature plasma-activated bonding was discussed based on systematic experiments and analysis.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Xin Li, Rui Xu, Xin Zhang, He Zhang, Jinglei Yang
Summary: In this study, the dynamic failure of Fiber Reinforced Metal Tubes (FRMTs) under inner blast load was investigated experimentally. FRMTs were prepared by winding basalt fiber or H-glass fiber onto an aluminum lining through filament winding process. The effects of explosive mass, winding angle, and number of layers on the failure modes were discussed. The results showed that FRMTs had better anti-blast performance compared to metallic tubes, and the best performance was achieved with a winding angle of +/- 55 degrees.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xin Zhang, Xin Li, Lei Liu, Bo Li, Xiaodong Hou, Deng Pan, Lina Gao, Shufeng Li
Summary: A new alloying strategy is proposed in this study to regulate the weak intrinsic interface and uncontrollable interfacial reaction in carbon nanotubes (CNTs) reinforced aluminum matrix composites (AMCs). The addition of Si element inhibits the interface reaction between Al and CNTs by hindering the dissolution and diffusion of carbon atoms in the Al matrix. The strength of the AMCs is enhanced through grain refinement, dislocation increment, improved wettability and interface bonding, as well as load transfer to CNTs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Xinmei Xiang, Dehua Shao, Xin Zhang, Shaolin Zhang, Yijie Liu
Summary: The compression performance of tapered tubes was studied using finite element simulations. The results showed that lateral corrugation and thickness gradient design can improve the energy absorption performance of the tubes.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Chemistry, Multidisciplinary
Heng Zhang, Haomin Chen, Jeng-Hun Lee, Eunyoung Kim, Kit-Ying Chan, Harun Venkatesan, Xi Shen, Jinglei Yang, Jang-Kyo Kim
Summary: This research aims to design a flexible optical/electrical skin capable of responding to complex stimuli with interactive feedback of human-readable structural colors. The OE-skin consists of various layers including an ionic electrode, elastomer dielectric layer, chromotropic layer, and a conductive carbon nanotube/MXene layer. It delivers an ultrafast, accurate response for capacitive pressure sensing and visualizes complex deformations in high-resolution spatial colors.
Article
Materials Science, Multidisciplinary
Dora Karagiozova, Meng Wang, Guoxing Lu
Summary: The mechanical properties of Miura-ori foldcore metamaterials were investigated using finite element simulations. The study analyzed the response of foldcores with different topological parameters to out-of-plane compression and shear loading, considering relative density as the governing parameter. The results revealed non-unique relationships between core density and material strength in different loading directions, highlighting the significant influence of the Miura-ori topology. Linear relationships were established between elastic moduli and relative densities, while power law functions were established for strength in different loading directions. The study also compared the mechanical characteristics of Miura-ori material with a prismatic hexagonal honeycomb, showing that the honeycomb outperformed the Miura-ori foldcore in all loading directions for large deformations.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Chemistry, Multidisciplinary
Xueqin Yang, Changhuo Xu, Xun Zhang, Pei Li, Feiyi Sun, Xinyue Liu, Xinyuan Wang, Ryan T. K. Kwok, Jinglei Yang, Jacky W. Y. Lam, Yongye Liang, Ben Zhong Tang
Summary: A facile molecular engineering strategy was developed to design photosensitizers (PSs) with aggregation induced emission (AIE) characteristics and responsive properties to the acidic tumor microenvironment (TME). Two near-infrared AIE luminogens called DBP-SPy and DBP-SPh were synthesized, which can form nanoaggregates and show different surface charge conversion properties in response to the pH of the TME. The DBP-SPy nanoaggregates demonstrated efficient photodynamic therapy on cancer cells in vitro and excellent tumor growth inhibition in vivo.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
He Zhang, Liang Zou, Yanhong Feng
Summary: Microcapsules containing conductive ionic liquid (IL) were synthesized using a novel microencapsulation technique, and their high potential for conductivity restoration in conductive pastes for printed circuits was verified. The prepared IL microcapsules have good dispersibility, solidity, and tunable properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Mechanical
Xinyi Zhang, Shenghai Wang, Yvonne Durandet, Suresh Palanisamy, Guoxing Lu
Summary: This study systematically investigates the tensile behavior of thin-walled tubes with pleated patterns, known as origami bellows. The experimental and numerical results show that the origami bellows exhibit desirable tensile process with stable and high plateau force. It provides a new avenue for constructing energy absorbers with good energy-absorption performance under tensile loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Peng Wang, Fan Yang, Pengfei Li, Weiren Zhang, Guoxing Lu, Hualin Fan
Summary: Inspired by the skeletal system of deep-sea glass sponge, a new structure called vertex modified body-centered cubic (VM-BCC) lattice was proposed, which outperforms conventional lattices in terms of strength, deformation stability, and energy absorption capacity. This novel bio-inspired lattice enriches the design space for lightweight energy absorbers and has potential applications in the fields of national defense, aerospace, navigation, and medical implants.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Chemical
Fan Liu, Jin Wang, He Zhang, Xiaohu Yao
Summary: This paper employed an elastic-plastic constitutive model to predict and analyze the stress relaxation of a glassy polymer. It was found that the model accurately predicted pre-yield stress relaxation but underestimated post-yield stress relaxation. To address this issue, the model was extended to incorporate an additional structural relaxation mechanism originating from the dissociation of weak linkages in the chain network. The extended model successfully explained both the yield/flow and stress relaxation behaviors throughout the deformation region, and the reasons behind it were analyzed. The knowledge revealed in this paper is instructive and may provide new insights into understanding the structural relaxation and mechanical behavior of glassy polymers.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Nan Nathan Xu, Yiqi An, Hongyu Yu, Jinglei Yang
Summary: This letter examines the performance of on-silicon inductor coils with integrated buck dc-dc converters made using a 180 nm CMOS process. A parallel shunting structure with different metal layers was chosen for its lower resistance and higher inductance in low-power IoT scenarios. Simulation results demonstrate stable values of more than 230 nH for the fabricated inductors within the expected frequency range. The proposed dc-dc converter achieves an efficiency of 69.1% at 30 MHz for a 12.9 mA load, operating at voltage levels of 2.4 to 1.2 V. Our approach enables high-inductance integration without the need for costly postprocessing techniques, expanding the application of power inductor and dc-dc converter integration.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Mechanical
Jiaqi Huang, Weixiang Shen, Guoxing Lu
Summary: This study investigates the failure mechanism of an 18650 cylindrical battery under different loading rates, revealing different failure forms and voltage drops under static and dynamic loading conditions. A finite element model is established to optimize the design of battery components and enhance their crashworthiness.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Xi Zhang, Xiaodong Huang, Guoxing Lu
Summary: In this study, a novel perforated Miura-ori phononic structure (PMPS) is introduced, and the tunability of complete or partial bandgaps in specific directions is investigated. The validity of the bandgaps is verified through simulation and experimental measurement of sound transmission loss in a three-dimensional printed Miura-ori panel. The results demonstrate extensive bandgap tunability of PMPS with different design parameters during deployments and folds. Additionally, potential applications of PMPS, such as programmable acoustic waveguides, are demonstrated. Lightweight PMPSs offer an attractive alternative for designing tunable, programmable, and reconfigurable acoustic structures, including sound waveguides, sound barriers, and broadband wave tailors.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Physics, Applied
Biyuan Liu, Le Zhou, Yixiang Wang, Shaobin Zhuo, Yanguang Zhou, Jinglei Yang, Zhigang Li
Summary: In this study, the diffusion of LiCl electrolytes in 3D-nanoporous graphene structures (3D-NGSs) was investigated using molecular dynamics simulations. The diffusion coefficients of water, Li+, and Cl- were calculated in 3D-NGSs with different LiCl concentrations, porosities, and surface charge densities. The results showed that the diffusion coefficients followed the Arrhenius Equation and power laws for the dependence on temperature and porosity, respectively. They decreased with increasing salt concentration.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yifeng Yu, Xin Zhang, Lichun Bai
Summary: This article proposes a method for coarse-grained molecular dynamics simulation of DLC films and verifies its reliability through comparison with experiments. By studying the contact model of nanoindentation, the elastic modulus of DLC films is calculated and the effect of relaxation is discussed. In addition, by comparing the coarse-grained simulation with experimental results, the friction simulation of DLC films is realized under sliding velocities.
DIAMOND AND RELATED MATERIALS
(2023)
