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AI for tribology:Present and future

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Friction 2024年第6期12卷 1060-1097页

作者： Nian YIN Pufan YANG Songkai LIU shuaihang pan Zhinan ZHANG State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical Engineering University of UtahSalt Lake CityUT 84112USA

With remarkable learning capabilities and swift operational speeds,artificial intelligence(AI)can assist researchers in swiftly extracting valuable patterns,trends,and associations from subjective *** behaviors are characterized by dependence on systems,evolution with time,and multidisciplinary *** friction process involves a variety of phenomena,including mechanics,thermology,electricity,optics,magnetics,and so ***,tribological information possesses the distinct characteristics of being multidisciplinary,multilevel,and multiscale,so that the application of AI in tribology is highly *** delineate the scope,classification,and recent trends of AI implementation in tribology,this review embarks on exploration of the tribology research *** comprehensively outlines the utilization of AI in basic theory of tribology,intelligent tribology,component tribology,extreme tribology,bio-tribology,green tribology,and other ***,considering the emergence of"tribo-informatics"as a novel interdisciplinary field,which combines tribology with informatics,this review elucidates the future directions and research framework of"AI for tribology".In this paper,tribo-system information is divided into 5 categories:input information(I),system intrinsic information(S),output information(O),tribological state information(Ts),and derived state information(Ds).Then,a fusion method among 5 types of tribo-system information and different AI technologies(regression,classification,clustering,and dimension reduction)has been proposed,which enables tribo-informatics methods to solve common problems such as tribological behavior state monitoring,behavior prediction,and system *** purpose of this review is to offer a systematic comprehension of tribo-informatics and to inspire new research ideas of ***,it aspires to enhance the efficiency of problem-solving in tribology.

关键词： artificial intelligence(AI) tribology machine learning tribo-informatics AI for tribology

Metal matrix nanocomposites in tribology: Manufacturing, performance, and mechanisms

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Friction 2022年第10期10卷 1596-1634页

作者： shuaihang pan Kaiyuan JIN Tianlu WANG Zhinan ZHANG Long ZHENG Noritsugu UMEHARA Department of Mechanical and Aerospace Engineering University of California Los Angeles(UCLA)Los AngelesCA 90095USA Physical Intelligence Department Max Planck Institute for Intelligent SystemsStuttgart 70569Germany Stake Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun 130022China Micro-Nano Mechanical Science Laboratory Department of Micro-Nano Mechanical Science and EngineeringGraduate School of EngineeringNagoya UniversityChikisa-ku Furo-choNagoyaAichi 464-8601Japan

Metal matrix nanocomposites(MMNCs)become irreplaceable in tribology industries,due to their supreme mechanical properties and satisfactory tribological ***,due to the dual complexity of MMNC systems and tribological process,the anti-friction and anti-wear mechanisms are unclear,and the subsequent tribological performance prediction and design of MMNCs are not easily possible:A critical up-to-date review is needed for MMNCs in *** review systematically summarized the fabrication,manufacturing,and processing techniques for high-quality MMNC bulk and surface coating materials in ***,important factors determining the tribological performance(mainly anti-friction evaluation by the coefficient of friction(CoF)and anti-wear assessment with wear rate)in MMNCs have been investigated thoroughly,and the correlations have been analyzed to reveal their potential coupling/synergetic roles of tuning tribological behavior of *** importantly,this review combined the classical metal/alloy friction and wear theories and adapted them to give a(semi-)quantitative description of the detailed mechanisms of improved anti-friction and anti-wear performance in *** guarantee the universal applications of these mechanisms,their links with the analyzed influencing factors(e.g.,loading forces)and characteristic features like tribo-film have been *** approach forms a solid basis for understanding,predicting,and engineering MMNCs’tribological behavior,instead of pure phenomenology and experimental ***,the pathway to achieve a broader application for MMNCs in tribo-related fields like smart materials,biomedical devices,energy storage,and electronics has been concisely discussed,with the focus on the potential development of modeling,experimental,and theoretical techniques in MMNCs’tribological *** general,this review tries to elucidate the complex tribo-performances of MMNCs in a fundamentally universal yet straightfor

关键词： metal matrix nanocomposites nanophases tribology manufacturing processes anti-wear performance strengthening effects anti-wear mechanisms

Fundamental theories and basic principles of triboelectric effect: A review

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Friction 2019年第1期7卷 2-17页

作者： shuaihang pan Zhinan ZHANG School of Mechanical Engineering Shanghai Jiao Tong University School of Mechanical & Aerospace Engineering University of California Los Angeles

Long-term observation of the triboelectric effect has not only proved the feasibility of many novel and useful tribo-devices(e.g., triboelectric nanogenerators), but also constantly motivated the exploration of its mysterious nature. In the pursuit of a comprehensive understanding of how the triboelectric process works, a more accurate description of the triboelectric effect and its related parameters and factors is urgently required. This review critically goes through the fundamental theories and basic principles governing the triboelectric process. By investigating the difference between each charging media, the electron, ion, and material transfer is discussed and the theoretical deduction in the past decades is provided. With the information from the triboelectric series, interesting phenomena including cyclic triboelectric sequence and asymmetric triboelectrification are precisely analyzed. Then, the interaction between the tribo-system and its operational environment is analyzed, and a fundamental description of its effects on the triboelectric process and results is summarized. In brief, this review is expected to provide a strong understanding of the triboelectric effect in a more rigorous mathematical and physical sense.

关键词： triboelectric effect triboelectrification triboelectric nanogenerators(TENGs) interface

Multiscale analysis of friction behavior at fretting interfaces

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Friction 2021年第1期9卷 119-131页

作者： Zhinan ZHANG shuaihang pan Nian YIN Bin SHEN Jie SONG State Key Laboratory of Mechanical Systems and Vibrations Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical&Aerospace Engineering University of California Los AngelesLos Angeles 90095USA Institute of Nano Biomedicine and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Friction behavior at fretting interfaces is of fundamental interest in tribology and is important in material ***,friction has contact intervals,which can accurately determine the friction characteristics of a material;however,this has not been thoroughly ***,the fretting process with regard to different interfacial configurations have also not been systematically *** bridge these research gaps,molecular dynamics(MD)simulations on Al–Al,diamond–diamond,and diamond–silicon fretting interfaces were performed while considering bidirectional *** paper also proposes new energy theories,bonding principles,nanoscale friction laws,and wear rate *** these models,semi-quantitative analyses of coefficient of friction(CoF)were made and simulation outcomes were *** results show that the differences in the hardness,stiffness modulus,and the material configuration have a considerable influence on the fretting *** can potentially lead to the force generated during friction contact intervals along with changes in the *** effect of surface separation can be of great significance in predicting the fretting process,selecting the material,and for optimization.

关键词： molecular dynamics simulation friction wear fretting

Thermally stable ultrafine grained copper induced by CrB/CrB_(2) microparticles with surface nanofeatures via regular casting

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Journal of Materials Science & Technology 2020年第23期58卷 55-62页

作者： Gongcheng Yao Chezheng Cao shuaihang pan Jie Yuan Igor De Rosa Xiaochun Li Department of Materials Science and Engineering University of CaliforniaLos AngelesCA 90095USA Department of Mechanical and Aerospace Engineering University of CaliforniaLos AngelesCA 90095USA

Ultrafine-grained(UFG)/nanocrystalline materials possess novel properties. Refining as-solidified grains of metals to the ultrafine and even nanometer scale by nanoparticles via slow cooling has been recently discovered. Here, we report that microparticles(CrB and CrB_(2)) with surface nanofeatures can also enable ultrafine/nano grains via slow cooling. CrB/CrB_(2) microparticles, formed by coalescence of nanoparticles in Cu matrix, display surface nanofeatures, which induce substantial grain refinement and stabilization down to the ultrafine/nano scale. The UFG Cu/Cr B and Cu/CrB_(2) samples exhibit exceptional thermal stability, comparable to UFG Cu induced by nanoparticles, without coarsening after annealing at 600°C for 1 h. The microhardness, strengths, and Young's moduli of the Cu/Cr B and Cu/CrB_(2) samples are significantly enhanced over pure Cu. This discovery has great potential to advance the mass production UFG/nanocrystalline for widespread applications.

关键词： Copper Microparticles with nanofeatures Casting Ultrafine grains Thermal stability

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微动界面连续干摩擦行为的分子动力学模拟

机械工程学报 2018年第3期54卷 82-87页

作者：潘帅航尹念张执南上海交通大学机械与动力工程学院上海200240 加州大学洛杉矶分校机械与航空航天工程系美国洛杉矶90095 中国科学研究院兰州化学物理研究所固体润滑国家重点实验室兰州730000

为探究微动界面连续干摩擦过程中的分子运动规律,以晶体硅-金刚石耦合微动摩擦副为研究对象,建立了单凸体固-固接触模型,并以摩擦力响应和摩擦力垂直方向(z向)力学响应为表征量进行了分子动力学模拟分析。结果表明,在多次摩擦接触间隙,... 详细信息

为探究微动界面连续干摩擦过程中的分子运动规律,以晶体硅-金刚石耦合微动摩擦副为研究对象,建立了单凸体固-固接触模型,并以摩擦力响应和摩擦力垂直方向(z向)力学响应为表征量进行了分子动力学模拟分析。结果表明,在多次摩擦接触间隙,微动界面之间存在连续、波动的摩擦力学响应;连续摩擦接触过程中,受黏滑现象、单凸体变形回复以及界面上被磨损原子重新分布释放应力等过程影响,摩擦间隙仍会产生一定的z向力学响应,该力学响应的大小甚至会超过之后摩擦接触状态的力学响应,从而影响到固-固耦合微动界面的摩擦力学特性。

关键词：分子动力学微动界面连续摩擦微动磨损

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含缺陷滚动轴承内部载荷分布

机械设计与研究 2016年第4期32卷 79-84页

作者：丁为民潘帅航张执南上海交通大学机械与动力工程学院上海200240

建立了外滚道含矩形剥落的滚动轴承接触力学模型,基于Hertz接触理论研究了静态径向载荷作用下轴承内部载荷分布,并探究了缺陷形貌(环向跨度角、轴向跨度角)对轴承内部载荷分布的影响。结果表明,当滚动体经过缺陷区域时,其载荷部分卸载... 详细信息

建立了外滚道含矩形剥落的滚动轴承接触力学模型,基于Hertz接触理论研究了静态径向载荷作用下轴承内部载荷分布,并探究了缺陷形貌(环向跨度角、轴向跨度角)对轴承内部载荷分布的影响。结果表明,当滚动体经过缺陷区域时,其载荷部分卸载或完全卸载,而承载区内的其他滚动体加载;缺陷形貌对滚动轴承内部载荷分布有显著影响。总体来说,缺陷相貌尺寸越大,对内部载荷分布的影响越显著,缺陷环向跨度角和轴向跨度角综合决定了滚动轴承内部载荷分布。

关键词：滚动轴承缺陷载荷分布