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SSRN 2024年

作者： Ning, Shunlu Su, Benlong Liu, Shouyao Zhou, Tianxiao He, Shixue Wu, Jian Tian, Zhenhui Wang, Youshan National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150001 China Center for Rubber Composite Materials and Structures Harbin Institute of Technology Weihai264209 China

Mixed modes I/II interlaminar delamination damage is one of the major forms of failure in cord-rubber composites, the accurate determination of mode I and mode II fracture toughness nonetheless remains a significant challenge. Hence, this study focused on the development of an analytical method for accurately determining the mode I and mode II fracture toughness of cord-rubber composites through peel and lap shear tests. The cohesive zone model is employed to investigate the mixed modes I/II interlaminar delamination process of cord-rubber composites using finite element analysis. The findings reveal that the mode I and mode II fracture toughness values for the cord-rubber composites are 23.92 N/mm and 13.57 N/mm, respectively. Notably, the discrepancy between numerical simulations and experimental maximum load capacities remains below 5% when the specimen length exceeds 8mm. In summary, this research introduces a robust methodology for evaluating the fracture toughness of cord-rubber composites, and it offers a detailed characterization of the associated crack initiation and propagation characteristics under mixed modes failure conditions. © 2024, The Authors. All rights reserved.

关键词： Fracture toughness

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Modified phase-field-based lattice Boltzmann model for incompressible multiphase flows

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Physical Review E 2021年第3期104卷 035305-035305页

作者： Xingchun Xu Yanwei Hu Bing Dai Lei Yang Jiecai Han Yurong He Jiaqi Zhu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China

Based on the phase-field theory, a multiple-relaxation-time (MRT) lattice Boltzmann model is proposed for the immiscible multiphase fluids. In this model, the local Allen-Chan equation is chosen as the target equation to capture the phase interface. Unlike previous MRT schemes, an off-diagonal relaxation matrix is adopted in the present model so that the target phase-field equation can be recovered exactly without any artificial terms. To check the necessity of removing those artificial terms, comparative studies were carried out among different MRT schemes with or without correction. Results show that the artificial terms can be neglected at low March number but will cause unphysical diffusion or interface undulation instability for the relatively large March number cases. The present modified model shows superiority in reducing numerical errors by adjusting the free parameters. As the interface transport coupled to the fluid flow, a pressure-evolution lattice Boltzmann equation is adopted for hydrodynamic properties. Several benchmark cases for multiphase flow were conducted to test the validity of the present model, including the static drop test, Rayleigh-Taylor instability, and single rising bubble test. For the rising bubble simulation at high density ratios, bubble dynamics obtained by the present modified MRT lattice Boltzmann model agree well with those obtained by the FEM-based level set and FEM-based phase-field models.

关键词： Binary fluids Lattice-Boltzmann methods Navier-Stokes equation

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Characterization and heat transfer model analysis of diamond/copper composite materials prepared by high-temperature lamination

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Diamond and Related Materials 2025年 157卷

作者： Su, Zhenhua Han, Kai Ye, Zhijie Zhao, Jiwen Tang, Xiangpeng Pang, Jinzhuo Zhao, Kunlong Cao, Wenxin Zhu, Jiaqi Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou450000 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Henan Core-diamond Material Technology Co. Ltd Zhengzhou450000 China

Diamond/copper(D/Cu) composites exhibit excellent properties of high thermal conductivity(TC) and low coefficient of thermal expansion(CTE), and thus hold broad application prospects in fields such as aerospace and electronic packaging. In this study, a novel fabrication process for D/Cu composite plate is presented, utilizing tungsten-coated diamond and copper sheets as raw materials. The results show that the TC of the D/Cu composite prepared by the high-temperature laminate process can reach 630.3 W/m·K. In comparison with the D/Cu composite prepared by the traditional hot pressing process, the composite prepared by the high-temperature laminate process exhibits higher smoothness and accuracy. Additionally, the flexural strength of the composite plate is as high as 283.7 MPa. Notably, the TC of the composite plate decreases by only 1 % after 100 thermal shock cycles. The diamond and tungsten carbide within the coating form a highly stable semi-coherent phase boundary. A simplified series-parallel model was employed to calculate the in-plane(xy) and out-of-plane(z) TC of the D/Cu plate. The modified model accurately describes the TC of D/Cu composites with high volume fractions, and the results were validated using finite element analysis. This study is of significant importance for addressing the processing challenges associated with D/Cu composites. © 2025 Elsevier B.V.

关键词： Hot pressing

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Transition-Metal-Doped Biphenylene for Enhanced Co Detection: A High-Throughput First-Principles Study

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SSRN 2024年

作者： Zhang, Jiao Cui, Li-Ying Xie, Ying Wang, Zhe Zhang, Yan-Chang Yang, Lin Zheng, Bing School of Chemistry and Materials Science Heilongjiang University Harbin150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China

Our study examines the CO detection capabilities of pristine biphenylene (BP) and transition-metal-doped BP (M-BP), a novel two-dimensional nano-carbon material. Despite BP’s potential in toxic gas detection, its low CO adsorption energy (Eads) of 0.134 eV limits its application. Utilizing a combined strategy of high-throughput computational screening and DFT technique, we accurately identified the ground state configurations of CO-adsorbed M-BP (M = Sc, Ti, Fe, Co, Ni, and Zn) and confirmed M doping significantly boosts BP’s CO adsorption ability, with Eads values ranging from 2.809 to 8.206 eV. This improvement is supported by ab initio molecular dynamics simulations and ionic d-p bonding interactions observed in electron localization functions, densities of state (DOS), and bond population analysis. Additionally, CO adsorption induces notable DOS curve significantly changes in the metallic M-BP systems, validating the potential of M-BP systems as suitable materials for CO detection. Notably, Ti-BP2 and Zn-BP2 show notable work function shifts after CO adsorption (0.41 and 0.36 eV, respectively), outperforming pristine BP’s 0.30 eV shift. These shifts underscore the potential of Ti-BP2 and Zn-BP2 for work function-based CO sensors, marking them as promising materials for sensitive CO detection. © 2024, The Authors. All rights reserved.

关键词： Transition metals

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Effects of silica/carbon black hybrid nanoparticles on the dynamic modulus of uncrosslinked cis-1,4-polyisoprene rubber: Coarse-grained molecular dynamics

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Polymer 2022年 238卷 124400-124400页

作者： Yuan, Bin Zeng, Fanlin Peng, Chao Wang, Youshan Department of Astronautic Science and Mechanics Harbin Institute of Technology Harbin China National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Center for Composite Materials Harbin Institute of Technology Harbin150001 China

Coarse-grained molecular dynamics (CGMD) simulations are employed to study the viscoelastic properties of cis-1,4-polyisoprene with silica/carbon black (CB) hybrid nanoparticles (NPs). Our simulation work for the first time investigates the rubber with both silica and CB NPs with the potential functions from the iterative Boltzmann inversion (IBI) method. We calculate the dynamic shear modulus of different models, and analyze the effect of silica/CB ratio and grafted NPs. In order to explain the differences in modulus from the microscopic view, we make the quantitative comparisons of the NP-NP, polymer-polymer and NP-polymer structures, such as using the radius of gyration, the coordination number, and the potential energy. The characteristics of dual phase filler are mainly in two aspects of potential functions. One is that the silica-CB interaction is weaker than that of their single components, and the other is that the NP-polymer potential functions are different in shape for Silica and CB. The former causes NPs to be more likely to aggregate in the form of "bridging". The latter causes that the silica-polymer interaction is weaker at small amplitudes, while the CB-polymer interaction is weaker at large amplitudes for the range of the strong CB-polymer interaction is narrow. The simulation result also shows that the break-up of the NP network is the main factor for the Payne effect, and the interfacial separation is the second factor. The reason why the storage modulus curves of the models with grafted NPs decrease slowly at small amplitudes is the hindering effect of the graft chains on the growth of the interfacial voids. © 2021

关键词： Molecular dynamics

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Time-sequential color code division multiplexing holographic display with metasurface

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Opto-Electronic Advances 2023年第8期6卷 8-16页

作者： Xin Li Qinmiao Chen Xue Zhang Ruizhe Zhao Shumin Xiao Yongtian Wang Lingling Huang Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China MoE Key Laboratory of Photoelectronic Imaging Technology and System and MIIT Key Laboratory of Photonics Information TechnologySchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information SystemHarbin Institute of Technology(Shenzhen)Shenzhen 518055China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Color metasurface holograms are powerful and versatile platforms for modulating the amplitude,phase,polarization,and other properties of light at multiple operating ***,the current color metasurface holography can only realize static *** this study,we propose and demonstrate a multiplexing metasurface technique combined with multiwavelength code-division multiplexing(CDM)to realize dynamic *** code references are utilized to record information within a single metasurface and increase the information capacity and security for anticracks.A total of 48 monochrome images consisting of pure color characters and multilevel color video frames were reconstructed in dual polarization channels of the birefringent metasurface to exhibit high information density,and a video was displayed via sequential illumination of the corresponding code patterns to verify the ability of dynamic *** approach demonstrates significant application potential in optical data storage,optical encryption,multiwavelengthversatile diffractive optical elements,and stimulated emission depletion microscopy.

关键词： metasurface color holography dynamic display code division multiplexing

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Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS2 Nanosheets

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Research 2021年第1期2021卷 1319-1331页

作者： Yifan Huang Fan Yang Sanhu Liu Rongguo Wang Jinhong Guo Xing Ma National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150086China Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Shenzhen STRONG Advanced Materials Research Institute Co. Ltd.China School of Communication and Information Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Shenzhen Key Laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Shenzhen Bay Laboratory No.9 Duxue RoadShenzhen 518055China

Real-time wireless respiratory monitoring and biomarker analysis provide an attractive vision for noninvasive telemedicine such as the timely prevention of respiratory arrest or for early diagnoses of chronic ***,wearable respiratory sensors are in high demand as they meet the requirement of portability in digital healthcare ***,high-performance sensing material plays a crucial role for the precise sensing of specific markers in exhaled air,which represents a complex and rather humid ***,we present a liquid metal-based flexible electrode coupled with SnS_(2)nanomaterials as a wearable gas-sensing device,with added Bluetooth capabilities for remote respiratory monitoring and *** flexible epidermal device exhibits superior skin compatibility and high responsiveness(1092%/ppm),ultralow detection limits(1.32 ppb),and a good selectivity of NO gas at ppb-level *** advantage of the fast recovery kinetics of SnS_(2)responding to H_(2)O molecules,it is possible to accurately distinguish between different respiratory patterns based on the amount of water vapor in the exhaled ***,based on the different redox types of H_(2)O and NO molecules,the electric signal is reversed once the exhaled NO concentration exceeds a certain threshold that may indicate the onset of conditions like asthma,thus providing an early warning system for potential lung ***,by integrating the wearable device into a wireless cloud-based multichannel interface,we provide a proof-of-concept that our device could be used for the simultaneous remote monitoring of several patients with respiratory diseases,a crucial field in future digital healthcare management.

关键词： Highly reversed integrating

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Dynamic Analysis of the Human-Machine System of a 4-Bar Gait Constraint Mechanism 5

Dynamic Analysis of the Human-Machine System of a 4-Bar Gait...

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5th International Conference on Mechatronics, Robotics and Automation, ICMRA 2022

作者： Li, Lailu Zhang, Lixun Wang, Bing Song, Da Harbin Institute of Technology National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin China Harbin Engineering University College of Mechanical and Electrical Engineering Harbin China Northeast Electric Power University School of Mechanical Engineering Jilin China

ISBN: (纸本)9781665472654

Bar gait constraint mechanism has been proposed in terms of its benefits: low-cost, easy to adjust, and low weight. Aiming to analyze the interaction characteristics between the human body and the end-effector of the 4-Bar mechanism, it is necessary to conduct the dynamic analysis of the human-machine system, including the interaction force, contact force, and joint torque. First, a gait constraint mechanism based on 4-Bar was introduced. Second, the dynamic mathematical model of the human-machine system was established. Third, the dynamic simulation based on the mathematical equations was carried out. The results demonstrate that the interaction force between the machine and the human body is smooth. The human joint torques are also in a reasonable range, indicating that the 4-Bar gait constraint mechanism could assist individuals with locomotion obstacles to achieve low-limb exercises. © 2022 IEEE.

关键词： Man machine systems

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A Novel Ce/Fe Bimetallic Metal-Organic Framework with an Ortho-Dodecahedral Multilevel Structure for Enhanced Adsorption Application

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SSRN 2024年

作者： Gao, Zunchang Wei, Yanqing Tian, Xin Liu, Yang Lan, Xin Zhang, Dawei Han, Shuaiyuan Huo, Pengfei Ministry of Education Harbin150040 China College of Materials Science and Engineering Northeast Forestry University Harbin150040 China National key laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 150000 China

The synthesis of a novel Ce/Fe bimetallic metal-organic frameworks (Ce/FcDA/FA-MOFs) through an innovative hydrothermal method, utilizing Ce as the central metal, and 1,1'-ferrocene dicarboxylic acid (FcDA) and formic acid (FA) as ligands are reported. Optimization of hydrothermal time, feed ratio, and the addition of FA resulted in Ce/FcDA/FA-MOFs with ideal ortho-dodecahedral hierarchical configurations. Comprehensive characterization through FT-IR, XRD, SEM, EDS, XPS, and N2 adsorption/desorption analyses elucidated the influence of FA on morphology and chemical structure. Phosphate adsorption tests on Ce/FcDA/FA-MOFs revealed sustained strong selectivity and adsorption capacity, even in the presence of coexisting anions and variations in pH. Kinetic, thermodynamic, and isothermal simulations indicated phosphate adsorption's spontaneous, efficient, and heat-absorbing properties on Ce/FcDA/FA-MOFs. Fitting parameters from the Langmuir adsorption model demonstrated a maximum adsorption capacity of up to 530.25 mg g-1, attributed to physical/chemical adsorption during the reaction. Furthermore, the adsorption mechanism of Ce/FcDA/FA-MOFs on phosphate was investigated through FT-IR, XRD, and XPS analyses of the adsorbed samples, revealing a complex process involving the electrostatic mutual attraction of outer-sphere entities and ligand exchange in the inner-sphere. This study advances our understanding of Ce/FcDA/FA-MOFs as effective adsorbents for phosphate and contributes to developing environmentally sustainable materials with potential applications in water treatment. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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High-performance position-sensitive detector based on the lateral photoelectrical effect of two-dimensional materials

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Light(science & Applications) 2020年第1期9卷 1170-1178页

作者： Chang Hu Xianjie Wang Bo Song Department of Physics Harbin Institute of Technology150001 HarbinChina National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology150001 HarbinChina

Two-dimensional(2D)materials such as graphene and transition-metal chalcogenides have been extensively studied because of their superior electronic and optical ***,2D materials have shown great practical application in position-sensitive detectors(PSDs),originating from the lateral photoelectrical effect of the materials or *** high position sensitivity and ultrafast photoresponse of PSDs based on 2D materials,especially compatibility with Si technology,may enable diverse optoelectronic *** this review,recent studies of PSDs based on 2D materials are summarized,providing a promising route for high-performance PSDs.

关键词： optoelectronic performance effect

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