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学者姓名：陈晖
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Abstract ：
In fiber-reinforced composites, the interfacial bonding between fibers and the matrix is crucial for determining the material's performance. A vacuum-assisted resin transfer molding (VARTM) process was utilized in this work to fabricate glass fiber fabric-reinforced polyamide 6 (GFF/PA6) composites through in-situ polymerization using caprolactam (CL) as the precursor. To enhance the fiber-matrix interfacial bonding, polyethylene glycol (PEG) was incorporated into the polymerization system, improving the hydrogen bonding between the matrix and fibers. Morphological observations and interface layer analysis revealed that the introduction of PEG resulted in improved interfacial bonding and increased interface layer thickness. Molecular dynamics simulations indicated that the amino formate groups formed by the reaction with PEG exhibited more hydrogen bonds with the hydroxyl groups on the glass fiber surface, thereby promoting interfacial bonding between the matrix and fibers. When the PEG content was 10 wt%, the tensile strength and the elongation at break of the corresponding composite increased by 160% and 300% compared to GFF/PA6 composites without PEG. This study presents a promising strategy for enhancing the fiber-matrix interfacial bonding by modifying the matrix, offering a prospective approach for developing high-strength thermoplastic composites.Highlights GFF/PA6 composites were fabricated via the VARTM method. The addition of PEG for matrix modification improved the interfacial bonding. The modification enhances the hydrogen bonding between the matrix and fibers. Good interfacial bonding can greatly promote the crystallization of the matrix. The composites exhibited a significant increase in strength and toughness. Preparation and properties of CFF/PA6-co-PEG composites. image
Keyword ：
composite composite copolymer copolymer glass fiber fabric glass fiber fabric interfacial bonding interfacial bonding vacuum-assisted resin transfer molding vacuum-assisted resin transfer molding
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| GB/T 7714 | Fang, Hui , Jia, Fenghui , Chen, Sheng et al. Significant enhancement of mechanical properties for glass fiber fabric-reinforced polyamide 6 composites by improving interfacial bonding [J]. | POLYMER COMPOSITES , 2024 , 45 (8) : 7541-7550 . |
| MLA | Fang, Hui et al. "Significant enhancement of mechanical properties for glass fiber fabric-reinforced polyamide 6 composites by improving interfacial bonding" . | POLYMER COMPOSITES 45 . 8 (2024) : 7541-7550 . |
| APA | Fang, Hui , Jia, Fenghui , Chen, Sheng , Zhang, Wei , Huang, Li , Wu, Fangjuan et al. Significant enhancement of mechanical properties for glass fiber fabric-reinforced polyamide 6 composites by improving interfacial bonding . | POLYMER COMPOSITES , 2024 , 45 (8) , 7541-7550 . |
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针对传统实验教学中存在以认知体验为主、缺乏连贯层次化设计和过度依赖实验报告等问题，以装备设计制造能力培养为导向，融合基于模型设计(MBD)、虚实结合的机电概念设计(MCD)、制造执行系统MES等理念方法，建立以项目式学习为驱动的层次递进式实验教学构架，改革现有专业课程实践知识体系，培养能够解决复杂工程问题的高质量机械工程人才。通过持续实践，取得了明显的成效。
Keyword ：
OBE OBE 实验教学体系 实验教学体系 装备设计制造 装备设计制造 项目式学习 项目式学习
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| GB/T 7714 | 陈晖 , 陈剑雄 , 黄惠 . 基于3M-PBL-OBE的机械工程实验教学体系改革与实践 [J]. | 中国现代教育装备 , 2024 , 4 (09) : 128-130,134 . |
| MLA | 陈晖 et al. "基于3M-PBL-OBE的机械工程实验教学体系改革与实践" . | 中国现代教育装备 4 . 09 (2024) : 128-130,134 . |
| APA | 陈晖 , 陈剑雄 , 黄惠 . 基于3M-PBL-OBE的机械工程实验教学体系改革与实践 . | 中国现代教育装备 , 2024 , 4 (09) , 128-130,134 . |
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Silicon carbide (SiC) is extremely hard and brittle, posing challenges for traditional abrasive machining. This study used molecular dynamics simulations to investigate synchronous versus asynchronous force -torque effects on SiC abrasive machining. Multi-grit diamond abrasion of 4H-SiC was modeled by applying controlled sinusoidal forces and torques. Asynchronous force -torque increased material removal rates up to 2X versus synchronous conditions by promoting particle agglomeration and enabling trapped particles to contribute. However, asynchronous operation also produced higher surface roughness and subsurface cracking from greater penetration. The alternating forces generated larger stresses that may have driven more plastic deformation and brittle fracture. The study provided atomic-scale insights into force -torque effects, establishing guidelines to potentially enhance efficiency through asynchronous operation despite drawbacks.
Keyword ：
Abrasive machining Abrasive machining Force -torque synchronization Force -torque synchronization Molecular dynamics Molecular dynamics Silicon carbide Silicon carbide
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| GB/T 7714 | Chen, Hui , Wang, Chengxin , Chen, Jianxiong et al. Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining [J]. | TRIBOLOGY INTERNATIONAL , 2024 , 192 . |
| MLA | Chen, Hui et al. "Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining" . | TRIBOLOGY INTERNATIONAL 192 (2024) . |
| APA | Chen, Hui , Wang, Chengxin , Chen, Jianxiong , Xie, Yu , Sun, Kailin , Huang, Yuhua et al. Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining . | TRIBOLOGY INTERNATIONAL , 2024 , 192 . |
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This study aims to develop a highly sensitive fire-warning material by synergistically combining graphene oxide (GO) with boron nitride (hBN), renowned for its exceptional thermal conductivity and flame retardancy. Urea and water were employed as precursors to exfoliate and functionalize hBN via a semi-solid-state stone-milling method, yielding amino-functionalized boron nitride nanosheets (BNNS-NH2) possessing a high aspect ratio. Subsequently, BNNS-NH2 was assembled with GO through a layer-by-layer assembly approach to fabricate a BNNS/GO composite membrane. Fire-warning tests were conducted on the composite membrane, unveiling an impressively short fire response time of only 0.2 s and an extended duration of up to 52 s, thus demonstrating its exceptional sensitivity and long-lasting fire-warning performance. Upon exposure to fire, the GO layer within the composite membrane underwent thermal reduction, leading to the formation of electrically conductive reduced graphene oxide (RGO). The high thermal conductivity of the BNNS layer, coupled with strong interfacial bonding, facilitated rapid heat propagation throughout the composite membrane, thereby promoting the thermal reduction reaction of GO and enhancing the response speed. Furthermore, the outstanding flame retardancy of BNNS contributed to the material's persistent fire-warning performance. © 2024 Elsevier B.V.
Keyword ：
Aspect ratio Aspect ratio Boron nitride Boron nitride Composite membranes Composite membranes Fires Fires Graphene Graphene III-V semiconductors III-V semiconductors Milling (machining) Milling (machining) Nanosheets Nanosheets Nitrides Nitrides Urea Urea
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| GB/T 7714 | Wu, Fangjuan , Yan, Zhao , Chen, Haoxiang et al. Simultaneous exfoliation and functionalization of high-aspect-ratio boron nitride nanosheets and their application in composite membranes for fire-warning systems [J]. | Materials Letters , 2024 , 361 . |
| MLA | Wu, Fangjuan et al. "Simultaneous exfoliation and functionalization of high-aspect-ratio boron nitride nanosheets and their application in composite membranes for fire-warning systems" . | Materials Letters 361 (2024) . |
| APA | Wu, Fangjuan , Yan, Zhao , Chen, Haoxiang , Zhong, Huolin , Chen, Hui , Xiao, Dan . Simultaneous exfoliation and functionalization of high-aspect-ratio boron nitride nanosheets and their application in composite membranes for fire-warning systems . | Materials Letters , 2024 , 361 . |
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A fluid-assisted fused deposition modeling (FA-FDM) 3D printing technique was proposed and employed to create anisotropically thermally conductive polymer composites (aniso-TCPCs). These composites have precisely controllable heat conduction pathways achieved by spraying boron nitride (BN) on both sides of the FDM 3D printed POE/PP materials. At the same BN content (cBN), the thermal conductivity (lambda) of the aniso-TCPCs is higher than that of the isotropic composites. When cBN = 60 wt%, the lambda of the aniso-TCPCs could reach 1.43 W m � 1 K- 1, improved over 510 % as compared to the POE/PP matrix. Both experimental and simulation results show that the design of the anisotropically thermally conductive pathways can significantly improve the thermal conductivity of the polymer composites for efficient heat dispersion. Overall, the present study would provide a point of reference for the rational design of effective heat dissipation materials with highly and precisely tunable heat transfer pathways.
Keyword ：
Anisotropic heat conduction Anisotropic heat conduction Fluid-assisted Fluid-assisted Fused deposition molding 3D printing Fused deposition molding 3D printing Thermally conductive composites Thermally conductive composites
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| GB/T 7714 | Cai, Zewei , Zhang, Jianfeng , Zhang, Lizhi et al. Fluid-assisted fused deposition modeling 3D printing of anisotropically thermally conductive polymer composites with precisely tunable heat transfer pathways [J]. | COMPOSITES COMMUNICATIONS , 2024 , 46 . |
| MLA | Cai, Zewei et al. "Fluid-assisted fused deposition modeling 3D printing of anisotropically thermally conductive polymer composites with precisely tunable heat transfer pathways" . | COMPOSITES COMMUNICATIONS 46 (2024) . |
| APA | Cai, Zewei , Zhang, Jianfeng , Zhang, Lizhi , Wang, Jianlei , Chen, Hui , Lv, Yan et al. Fluid-assisted fused deposition modeling 3D printing of anisotropically thermally conductive polymer composites with precisely tunable heat transfer pathways . | COMPOSITES COMMUNICATIONS , 2024 , 46 . |
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The photoelectric conversion efficiency of photovoltaic thermal (PVT) systems is a key concern in solar energy research. The widespread use of continuous nanofluid cooling in PVT/NPCM (NanoEnhanced Phase Change Material) systems leads to heightened energy consumption. In order to improve efficiency of the PVT/NPCM systems, a two-dimensional transient heat transfer numerical model is established to analyze the PVT/NPCM system with intermittent flow cooling. Corresponding govern equations with boundary conditions are proposed, and numerically solved by using the finite element method. Simulation results are compared with experimental data, showing a deviation of less than 7 %. The findings indicate that the intermittent cooling reduces the flow energy consumption required to drive 2220 L of nanofluid compared to continuous cooling over a 7-h period. Furthermore, under intermittent cooling conditions, the average electrical efficiency stands at approximately 19.7 %. Notably, the electrical efficiency of PVT/NPCM systems employing intermittent flow cooling closely aligns with those employing continuous flow cooling, exhibiting a maximum deviation of merely 0.0348 %. Additionally, intermittent flow cooling emerges as a favorable choice under solar radiation intensities surpasses 1000W/m 2 , enabling a significant reduction in overall energy consumption while maintaining commendable cooling performance.
Keyword ：
Nanofluid Nanofluid Nano-phase change material Nano-phase change material Numerical methodology Numerical methodology Photovoltaic Photovoltaic Solar energy Solar energy
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| GB/T 7714 | Chen, Hui , Zhang, Jianfeng , Shen, Ming et al. Comprehensive numerical modeling of intermittent flow cooling with enhanced photovoltaic efficiency in PVT/NPCM systems [J]. | CASE STUDIES IN THERMAL ENGINEERING , 2024 , 58 . |
| MLA | Chen, Hui et al. "Comprehensive numerical modeling of intermittent flow cooling with enhanced photovoltaic efficiency in PVT/NPCM systems" . | CASE STUDIES IN THERMAL ENGINEERING 58 (2024) . |
| APA | Chen, Hui , Zhang, Jianfeng , Shen, Ming , Fang, Hui , Ma, Yiren . Comprehensive numerical modeling of intermittent flow cooling with enhanced photovoltaic efficiency in PVT/NPCM systems . | CASE STUDIES IN THERMAL ENGINEERING , 2024 , 58 . |
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Ternary nanofluid is a novel class of working fluids with excellent heat transfer properties. A combination of three solid nanoparticles consisting of SWCNTs, TiO2, and MoS2 is investigated for Darcy-Forchheimer water-based ternary nanofluids. The related mathematical models are established by considering linear, quadratic and nonlinear thermal radiations. Numerical results and entropy generation analysis reveal the considerable influence of nonlinear thermal radiation on temperature and the reduced Nusselt number of ternary nanofluids. With the help of multiple quadratic regression, the impact of relevant parameters on the reduced Nusselt number is studied in depth. The results show that the temperature and Nusselt number are always the highest in the nonlinear thermal radiation model compared with the linear and quadratic ones, and they are most sensitive to the changes of Rd and delta. The thermal radiation properties of ternary nanofluids may potentially lead to more efficient solar energy conversion. This comparative study illustrates the advantages of ternary nanofluids in improving solar radiation utilization efficiency with nonlinear thermal radiation.
Keyword ：
Dary-forchheimer flow Dary-forchheimer flow Entropy generation Entropy generation Multiple quadratic regression Multiple quadratic regression Nonlinear thermal radiation Nonlinear thermal radiation Ternary nanofluids Ternary nanofluids
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| GB/T 7714 | Chen, Hui , He, Panfeng , Shen, Ming et al. Thermal analysis and entropy generation of Darcy-Forchheimer ternary nanofluid flow: A comparative study [J]. | CASE STUDIES IN THERMAL ENGINEERING , 2023 , 43 . |
| MLA | Chen, Hui et al. "Thermal analysis and entropy generation of Darcy-Forchheimer ternary nanofluid flow: A comparative study" . | CASE STUDIES IN THERMAL ENGINEERING 43 (2023) . |
| APA | Chen, Hui , He, Panfeng , Shen, Ming , Ma, Yiren . Thermal analysis and entropy generation of Darcy-Forchheimer ternary nanofluid flow: A comparative study . | CASE STUDIES IN THERMAL ENGINEERING , 2023 , 43 . |
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Viscoelastic fibre prestressing (VFP) is a promising technique to counterbalance the potential thermal residual stress within a polymeric composite, offering superior mechanical benefits for structural engineering applications. It has been demonstrated that the time required for a desirable creep strain can be significantly reduced by implementing higher creep stress, while its long-term stability is still unknown. Here, we developed the prestress equivalence principle and investigated the durability of viscoelastic fibre prestressing within a composite in order to further enrich the prestress mechanisms. The effectiveness of the prestress equivalence principle was refined through Charpy impact testing of prestressed samples with various pre-strain levels. The durability was investigated by subjecting samples to both natural aging (up to 0.5 years) and accelerated aging (by using the time-temperature superposition principle). It is found that the prestress equivalence principle offers flexibility for viscoelastically prestressed polymeric matrix composite (VPPMC) technology; the impact benefits offered by VFP are still active after being accelerated aged to an equivalent of 20,000 years at 20 degrees C, inferring long-term reliability of VFP-generated fibre recovery within a polymeric composite. These findings demonstrated that both materials and energy consumption could be conserved for advanced composites. Therefore, they promote further steps of VPPMC technology toward potential industrial applications, especially for impact protection.
Keyword ：
durability durability impact impact polymeric composite polymeric composite prestress prestress viscoelasticity viscoelasticity
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| GB/T 7714 | Lin, Xueqi , Wang, Bing , Zhao, Chenmin et al. Durability of Viscoelastic Fibre Prestressing in a Polymeric Composite [J]. | POLYMERS , 2023 , 15 (4) . |
| MLA | Lin, Xueqi et al. "Durability of Viscoelastic Fibre Prestressing in a Polymeric Composite" . | POLYMERS 15 . 4 (2023) . |
| APA | Lin, Xueqi , Wang, Bing , Zhao, Chenmin , Nsengiyumva, Walter , Zhong, Shuncong , Chen, Hui et al. Durability of Viscoelastic Fibre Prestressing in a Polymeric Composite . | POLYMERS , 2023 , 15 (4) . |
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The elastic fibre prestressing (EFP) technique has been developed to balance the thermal residual stress generated during curing of a polymeric composite. The continuous fibre reinforcements are prestressed and then impregnated into a polymeric matrix, where the prestress load is only removed after the resin is fully cured in order to produce an elastically prestressed polymeric matrix composite (EPPMC). Although the EFP is active in improving the static mechanical performance of a composite, its mechanics on dynamic mechanical performance and viscoelasticity of a composite is still limited. Here, we established a theoretical model in order to decouple the EFP principle, aiming to better analyse the underlying mechanics. A bespoke fibre prestressing rig was then developed to apply tension on a unidirectional carbon-fibre-reinforced epoxy prepreg to produce EPPMC samples with various EFP levels. The effects of EFP were then investigated by carrying out both static and dynamic mechanical testing, as well as the viscoelastic creep performance. It was found that there is an optimal level of EFP in order to maximise the prestress benefits, whilst the EFP is detrimental to the fibre/matrix interface. The EFP mechanisms are then proposed based on these observations to reveal the in-plane stress evolutions within a polymeric composite.
Keyword ：
carbon-fibre-reinforced polymeric composite carbon-fibre-reinforced polymeric composite elasticity and viscoelasticity elasticity and viscoelasticity fibre fibre in-plane stress in-plane stress matrix interface matrix interface mechanics mechanics prestress prestress
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| GB/T 7714 | Chen, Hui , Yu, Folian , Wang, Bing et al. Elastic Fibre Prestressing Mechanics within a Polymeric Matrix Composite [J]. | POLYMERS , 2023 , 15 (2) . |
| MLA | Chen, Hui et al. "Elastic Fibre Prestressing Mechanics within a Polymeric Matrix Composite" . | POLYMERS 15 . 2 (2023) . |
| APA | Chen, Hui , Yu, Folian , Wang, Bing , Zhao, Chenmin , Chen, Xiayu , Nsengiyumva, Walter et al. Elastic Fibre Prestressing Mechanics within a Polymeric Matrix Composite . | POLYMERS , 2023 , 15 (2) . |
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Nanoscale polymeric coatings have been developed and utilized in a wide range of industries for decades. The ability for quality control at nanoscale is critical to large-scale industrial development. Nondestructive testing (NDT) techniques play vital roles in structural health monitoring of the nanocoatings throughout their lifetime stages. In terms of recent advances in quality control of nanocomposite coatings, here we present and discuss the commonly used inspection techniques for ex-situ detections, as well as the promising in-situ or inline monitoring methods, with a focus on the application of NDT techniques. Future development of NDT techniques for polymeric nanocomposite coatings will be directed toward intelligent and automated inspection systems, in order to avoid errors caused by human factors and further improve accuracy and reliability. © 2023 Elsevier Inc. All rights reserved.
Keyword ：
coating coating detection detection nanoscale nanoscale Nondestructive testing Nondestructive testing polymer polymer
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| GB/T 7714 | Zhao, C. , Wang, B. , Zhong, S. et al. NDT studies of nanoscale polymeric coatings [未知]. |
| MLA | Zhao, C. et al. "NDT studies of nanoscale polymeric coatings" [未知]. |
| APA | Zhao, C. , Wang, B. , Zhong, S. , Akhtaruzzaman, M. , Liang, W. , Chen, H. . NDT studies of nanoscale polymeric coatings [未知]. |
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