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Adhesion Performances Between Two Orthotropic Solids Influenced by Temperature Increment

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Acta Mechanica Solida Sinica 2024年第3期37卷 430-443页

作者： Qing-hui Luo yue-Ting Zhou School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai200092China

The classical adhesive contact models belong to isothermal adhesion theories,where the effect of temperature on adhesion was ***,a number of experimental results indicated that the adhesion behaviors can be significantly affected by *** this paper,the two-dimensional non-slipping anisothermal adhesion behaviors between two orthotropic elastic cylinders are investigated within the framework of the Johnson-Kendall-Roberts *** stated problem is reduced to the coupled singular integral equations by virtue of the Fourier integral transform,which are solved analytically with the analytical function *** closed-form solutions for the stress fields in the presence of thermoelastic effect are *** stable equilibrium state of contact system is determined by virtue of the Griffith energy *** effect of temperature difference on adhesion behaviors between orthotropic solids is *** is found that the difference between the oscillatory and non-oscillatory solutions increases with increasing the degree of anisotropy of orthotropic *** oscillatory solution cannot be well approximated by the non-oscillatory solution for the orthotropic materials with relatively high anisotropy.

关键词： Adhesive contact Non-slipping JKR model Temperature Griffith energy balance

Investigation of stress distribution and damage behavior caused by forced installation of a composite bolted joint with a hole-location error

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Chinese Journal of Aeronautics 2024年第1期37卷 201-217页

作者： Chinan liu Yuan LI Yi CHENG An’an ZHAO Kunpeng DU yue SHI Ximing LI hui CHENG School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China AVIC Xi’an Aircraft Industry Group Company LTD Xi’an 710089China

In this paper,the influence of forced installation caused by a hole-location error on the 3D stress distribution and damage of a composite bolted joint is *** analytical model of stress distributed on composite holes is promoted,in view of non-uniform extrusion caused by forced *** first,non-uniform extrusion of the hole edge caused by forced installation is *** to the contact state,expression of hole deformation is ***,based on Hertz theory,the maximum extrusion load is obtained with help of deformation *** constructing an elastic foundation beam model,3D stress distributed on a hole could be analyzed according to the extrusion ***,stress distribution predicted by the above analytical method is compared with that provided by FE considering composite ***,a forced installation experiment is carried out to analyze the damage distribution of the *** show that a central-symmetrically distributed stress is introduced by the hole-location *** an increment of the error,strength of composite decreases due to extrusion ***,stress presents a concave distribution on the *** the hole-location error exceeding 3%,stress decreases gradually due to failure of *** of holes does not exhibit a centrosymmetric *** damage is mainly distributed on the entrance of the hole at the lower sheet.

关键词： Hole-location error Composite joint Forced installation Stress distribution Damage

Nanopore design of sulfur doped hollow carbon nanospheres for superior potassium-ion battery anodes

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Rare Metals 2024年第5期43卷 2103-2114页

作者： Zhen-Dong liu hui-Yan Feng Yu-Chen Wang Fei Wang yue liu Jian-Xiao Yang yue Gu Jun Tan Chong Ye Cheng-Zhi Zhang Ji Hua Laboratory Foshan 528000China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and EngineeringHunan UniversityChangsha 410082China

Sulfur doped carbonaceous materials are promising anodes for potassium-ion batteries because of their ability to bridge active sites and induce C/S electron coupling,resulting in increased ion storage capacitance However,the large potassium ions could cause significant volume expansion and structure collapse during operation in sulfur doped carbonaceous anodes,which lead to rapidly capacity sacrifice during long-term *** design for anchoring sulfur atom in carbon skeleton is a novel way to alleviate the structure collapse and maintain the cycling ***,this study developed a controlled nanopore and sulfur doped carbon sphere structure(S-NPHCSs).In potassium-ion batteries S-NPHCSs anode demonstrated exceptional performance with a high reversible capacity of 247 mAh·g^(–1)after 50 cycles at 0.2 A·g^(–1)and delivered a long cycle stability of 600 cycles at a high current density of 1.0 A·g^(–1).Interconnected nanopores and doped sulfur structure not only expand the accumulation space and offer ample active sites for diffusion and adsorption of potassium ions,but also build stable channels through nanopore structure to ensure the cyclic *** finding provides a fundamental theory for designing nanopore structures and introducing sulfur doped carbonaceous materials to enhance capacitive potassium storage and long cycle stability.

关键词： Nanopore Carbon materials Sulfur doping Anode Potassium-ionbatteries

考虑活塞-活塞销系统结构变形及空穴机理的活塞销润滑分析(英文)

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2015年第6期16卷 443-463页

作者： Lin BA Zhen-peng HE yue-hui liu Gui-chang ZHANG School of Materials Science and Engineering Tianjin University Aviation Institute of Automation Civil Aviation University of China State Key Laboratory of Engines Tianjin University

目的:建立柔性结构下的活塞-活塞销耦合系统的润滑模型,分析活塞销的形貌和结构对活塞销的摩擦磨损的影响,为活塞销的设计提供参考依据。创新点:1.建立柔性结构下的活塞销多体动力学模型,将空穴理论与活塞销润滑模型耦合,研究活塞销的... 详细信息

目的:建立柔性结构下的活塞-活塞销耦合系统的润滑模型,分析活塞销的形貌和结构对活塞销的摩擦磨损的影响,为活塞销的设计提供参考依据。创新点:1.建立柔性结构下的活塞销多体动力学模型,将空穴理论与活塞销润滑模型耦合,研究活塞销的润滑情况;2.考虑活塞的热变形,使得活塞销润滑情况更贴近于实际;3.将活塞销的干接触位置与实际活塞销磨损位置进行对比,验证活塞销的易磨损部位。方法:1.基于有限元理论构建活塞-活塞销耦合系统润滑分析所需的有限元模型(图3);2.基于模态缩减理论建立活塞-活塞销耦合系统多体动力学仿真模型,将热变形耦合于活塞销型线中(图4);3.分析活塞销的基本润滑特性,比较空穴现象对润滑的影响(图12–15);4.分析不同型面的活塞销的润滑特性,比较各种型线下活塞销的润滑情况(图16–18);5.分析不同销孔内径下活塞销的润滑特性(图21和22)。结论:1.在活塞销润滑问题分析中,考虑到有限差分网格密度和有限元网格密度不一致,采用节点插值算法解决压力不收敛问题;2.从压力作用于活塞顶部的形式方面分析,研究活塞销易发生干接触的部位;3.对比分析是否考虑空穴机理的活塞销润滑特性;研究结果表明,由于油膜破裂导致油膜不能承受载荷,且承受油膜压力位置的密度为油膜密度,其它区域小于油膜密度;4.对比不同型线下活塞销的干接触情况,为活塞销的设计提供参考依据;5.研究不同活塞销孔内径下的润滑,考虑活塞销的热变形,使得润滑分析更贴近实际。

关键词：活塞销活塞销座轴承润滑空穴

Knittable and washable aerogel fiber inspired by polar bear hair

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Science China Materials 2024年第2期67卷 705-706页

作者： yue liu huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Institute of Fiber Materials and DevicesFudan UniversityShanghai 200438China

The advances in chemistry and materials have boosted the development of smart textiles,which are poised to revolutionize human lifestyles through multifunctional integration,such as heating,cooling,sensing and supplying energy^([1,2]).Among them,thermal insulation is an essential function of textiles to protect humans from complex and extreme environments and realize personal thermal management without energy con-sumption^([3]).

关键词： textiles insulation extreme

Acupuncture and moxibustion for irritable bowel syndrome:An umbrella systematic review

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Journal of Integrative Medicine 2024年第1期22卷 22-31页

作者： yue-ying Ma Zhou Hao Zi-yi Chen Yan-xi Shen hui-rong liu Huan-gan Wu Chun-hui Bao Shanghai Clinical Research Centre for Acupuncture and Moxibustion Yueyang Hospital of Integrated Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China Key Laboratory of Acupuncture and Immunological Effects Shanghai University of Traditional Chinese MedicineShanghai 200030China

BackgroundIrritable bowel syndrome(IBS)is a functional bowel disease characterized by abdominal pain or discomfort associated with altered bowel *** clinical studies have demonstrated the effectiveness of acupuncture and moxibustion for *** systematic reviews of acupuncture and moxibustion for IBS have been published in recent years,but their results are not entirely *** evaluate the methodological,reporting,and evidence quality of systematic reviews of acupuncture and moxibustion for *** strategySystematic reviews of acupuncture and moxibustion for IBS published before February 20,2023 were searched in eight databases:PubMed,Embase,Cochrane Library,Web of Science,China National Knowledge Infrastructure,Wanfang Data,VIP Database for Chinese Technical Periodicals,and China Biology *** keywords used for literature search were acupuncture,moxibustion,systematic review,meta-analysis,and irritable bowel *** criteriaSystematic reviews and meta-analyses of randomized controlled trials of acupuncture and moxibustion for IBS were *** extraction and analysisRelevant information was independently extracted by two *** A MeaSurement Tool to Assess systematic Reviews 2(AMSTAR 2),Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA 2020),and Grading of Recommendations Assessment,Development and Evaluation(GRADE)were used to evaluate the methodological quality,reporting quality and evidence quality,*** total of 342 studies were retrieved and 15 systematic reviews were *** results of AMSTAR 2 showed low methodological quality in 2 studies and very low methodological quality in the remaining 13 studies,with main issues being failure to register a protocol,incomplete search strategy,not providing a list of excluded studies,incomplete consideration of the risk of bias in the included studies,and a failure to assess the publication *** results of

关键词： Irritable bowel syndrome Acupuncture Moxibustion Umbrella systematic review Systematic review

Analytical solutions for constant-rate test in bounded confined aquifers with non-Darcian effect

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Journal of Groundwater Science and Engineering 2022年第4期10卷 311-321页

作者： Yi-jie Zong Li-hua Chen Jian-jun liu yue-hui liu Yong-xin Xu Fu-wan Gan Liang Xiao College of Civil Engineering and Architecture Guangxi UniversityNanning 530004China Guangxi Key Laboratory of Disaster Prevention and Engineering Safety Guangxi UniversityNanning 530004China Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi UniversityNanning 530004China Department of Earth Sciences University of the Western CapeCape Town 8000South Africa

This paper proposes a simplified analytical solution considering non-Darcian and wellbore storage effect to investigate the pumping flow in a confined aquifer with barrier and recharge *** mathematical modelling for the pumping-induced flow in aquifers with different boundaries is developed by employing image-well theory with the superposition principle,of which the non-Darcian effect is characterized by Izbash’s *** solutions are derived by Boltzmann and dimensionless ***,the non-Darcian effect and wellbore storage are especially investigated according to the proposed *** results show that the aquifer boundaries have non-negligible effects on pumping,and ignoring the wellbore storage can lead to an over-estimation of the drawdown in the first 10 minutes of *** higher the degree of non-Darcian,the smaller the drawdown.

关键词： Non-Darcian effect Bounded aquifer Wellbore storage Izbash’s equation Analytical solution

Magnetic resonance imaging of extraocular rectus muscles abnormalities in acute acquired concomitant esotropia

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 119-125页

作者： Jia-Yu Chen Li-Rong Zhang Jia-Wen liu Jie Hao hui-Xin Li Qiong-yue Zhang Zhao-hui liu Jing Fu Beijing Tongren Eye Center Beijing Tongren HospitalBeijing Key Laboratory of Ophthalmology&Visual SciencesCapital Medical UniversityBeijing 100176China Department of Radiology Beijing Tongren HospitalCapital Medical UniversityBeijing 100176China Department of Industrial Engineering and Operation Research University of CaliforniaBerkeley 94720USA

AIM:To investigate the difference of medial rectus(MR)and lateral rectus(LR)between acute acquired concomitant esotropia(AACE)and the healthy controls(HCs)detected by magnetic resonance imaging(MRI).METHODS:A case-control *** subjects with AACE and eighteen HCs were *** scanning data were conducted in target-controlled central gaze with a 3-Tesla magnetic resonance *** muscles(EOMs)were scanned in contiguous image planes 2-mm thick spanning the EOM origins to the globe *** form posterior partial volumes(PPVs),the LR and MR cross-sections in the image planes 8,10,12,and 14 mm posterior to the globe were summed and multiplied by the 2-mm slice *** data were classified according to the right eye,left eye,dominant eye,and non-dominant eye,and the differences in mean cross-sectional area,maximum cross-sectional area,and PPVs of the MR and LR muscle in the AACE group and HCs group were compared under the above classifications ***:There were no significant differences between the two groups of demographic *** mean cross-sectional area of the LR muscle was significantly greater in the AACE group than that in the HCs group in the non-dominant eyes(P=0.028).The maximum cross-sectional area of the LR muscle both in the dominant and non-dominant eye of the AACE group was significantly greater than the HCs group(P=0.009,P=0.016).For the dominant eye,the PPVs of the LR muscle were significantly greater in the AACE than that in the HCs group(P=0.013),but not in the MR muscle(P=0.698).CONCLUSION:The size and volume of muscles dominant eyes of AACE subjects change significantly to overcome binocular *** LR muscle become larger to compensate for the enhanced convergence in the AACE.

关键词： acute acquired concomitant esotropia magnetic resonance imaging extraocular muscles

Thermal transports in the MXenes family:Opportunities and challenges

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Nano Research 2024年第8期17卷 7700-7716页

作者： Yurui liu yue Wu Xinwei Wang Department of Chemical and Biological Engineering Iowa State University618 Bissell AmesIA 50011USA Department of Mechanical Engineering 271 Applied Science Complex II1915 Scholl RoadIowa State UniversityAmesIA 50011USA

The carbides and nitrides of transition metals known as“MXenes”refer to a fast-growing family of two-dimensional materials discovered in *** to their unique nanolayer structure,superior electrical,mechanical,and thermal properties,MXenes have shown great potential in addressing the critical overheating issues that jeopardize the performance,stability,and lifetime of high-energy-density components in modern devices such as microprocessors,integrated circuits,and capacitors,*** outstanding intrinsic thermal conductivity of MXenes has been proved by experimental and theoretical *** MXenes-enabled high thermal conductivity composites incorporated with polymer matrix have also been reported and widely used as thermal management *** the booming heat dissipation demands,MXenes-enabled thermal management material is an extremely valuable and scalable option for modern electronics ***,the fundamental thermal transport mechanisms behind the MXenes family remain *** MXene thermal conductivity disparities between the theoretical prediction and experimental results are still *** better understand the thermal conduction in MXenes and provide more insights for engineering high-performance MXene thermal management materials,in this article,we summarize recent progress on thermal conductive *** essential factors that affect MXenes intrinsic thermal conductivities are tackled,selected MXenes-polymer composites are highlighted,and prospects and challenges are also discussed.

关键词： transition metal carbide(MXene) thermal transport two-dimensional materials thermally conductive composites