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Janus Poly(Vinylidene Fluoride)Membranes with Penetrative Pores for Photothermal Desalination

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Research 2020年第1期2020卷 534-544页

作者： hao-hao Yu lin-Jiong Yan Ye-Cheng Shen Si-Yu Chen hao-nan li Jing Yang Zhi-Kang Xu MOE Key Laboratory of Macromolecular Synthesis and Functionalization and Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Solar-driven desalination has been considered as a promising technology for producing clean water through an abundant and pollution-free energy *** is a critical challenge to reasonably design the porous morphology and the thermal management of photothermal membranes for enabling efficient energy conversion and water *** this work,a Janus poly(vinylidene fluoride)membrane was fabricated in combination of penetrative pore structure,asymmetric surface wettability with proper thermal management for high-efficiency solar *** open and directly penetrative pores achieved by the two-dimensional solvent freezing strategy are considered to provide direct pathways for water and vapor *** unique feature of hydrophobic upper layer/hydrophilic lower layer enables the photothermal membranes to self-float on the water surface and rapidly pump water from the bulk to the *** resulting Janus membrane exhibits a satisfactory light absorbance as high as 97%and a photothermal conversion efficiency of 62.8%under one-sun irradiation in a direct contact *** solar-to-vapor efficiency rises up to 90.2%with the assistance of a thermal insulator adopted *** the Janus membrane and the composite setup are able to work efficiently with a high stability in seawater desalination,and the concentration of ion in condensed water is reduced to below 1 ***,Janus membranes with directly penetrative pores and photothermal surfaces shine a light on the development of high-performance solar evaporators for the practical application in solar seawater desalination.

关键词： composite thermal pores

Modelling of grinding mechanics:A review

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Chinese Journal of Aeronautics 2023年第7期36卷 25-39页

作者： Qingyu MENG Bing GUO Qingliang Zhao hao nan li Mark JJACKSON Barbara SliNKE Xichun LUO Center for Precision Engineering School of Mechatronics EngineeringHarbin Institute of TechnologyHarbin 150001China School of Aerospace The University of Nottingham NingboNingbo 315100China School of Integrated Studies College of Technology and AviationKansas State UniversitySalinaKS 67401USA Department of Mechanical and Aerospace Engineering University of California DavisDavisUSA Centre for Precision Manufacturing DMEMUniversity of StrathclydeGlasgowUK

Grinding is one of the most widely used material removal methods at the end of many process *** force is related to almost all grinding parameters,which has a great influence on material removal rate,dimensional and shape accuracy,surface and subsurface integrity,thermodynamics,dynamics,wheel durability,and machining system *** that grinding force is related to almost all grinding parameters,grinding force can be used to detect grinding wheel wear,energy calculation,chatter suppression,force control and grinding process *** prediction of grinding forces is important for optimizing grinding parameters and the structure of grinding machines and *** there are substantial research papers on grinding mechanics,a comprehensive review on the modeling of grinding mechanics is still absent from the *** fill this gap,this work reviews and introduces theoretical methods and applications of mechanics in grinding from the aspects of modeling principles,limitations and possible future trendencies.

关键词： Force modeling Grinding Grinding mechanics Macro force Micro force Model application

Comparative assessment of force,temperature,and wheel wear in sustainable grinding aerospace alloy using biolubricant

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Frontiers of Mechanical Engineering 2023年第1期18卷 1-33页

作者： Xin CUI Changhe li Yanbin ZHANG Wenfeng DING Qinglong AN Bo liU hao nan li Zafar SAID Shubham SHARMA Runze li Sujan DEBNATH School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongChina College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Sichuan Future Aerospace Industry LLC. Shifang 618400China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China College of Engineering University of SharjahSharjah 27272United Arab Emirates Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia

The substitution of biolubricant for mineral cutting fluids in aerospace material grinding is an inevitable development direction,under the requirements of the worldwide carbon emission ***,serious tool wear and workpiece damage in difficult-to-machine material grinding challenges the availability of using biolubricants via minimum quantity *** primary cause for this condition is the unknown and complex influencing mechanisms of the biolubricant physicochemical properties on *** this review,a comparative assessment of grindability is performed using titanium alloy,nickel-based alloy,and high-strength ***,this work considers the physicochemical properties as the main factors,and the antifriction and heat dissipation behaviours of biolubricant in a high temperature and pressure interface are comprehensively ***,the comparative assessment of force,temperature,wheel wear and workpiece surface for titanium alloy,nickel-based alloy,and high-strength steel confirms that biolubricant is a potential replacement of traditional cutting fluids because of its improved lubrication and cooling ***-viscosity biolubricant and nano-enhancers with high thermal conductivity are recommended for titanium alloy to solve the burn puzzle of the *** with high viscosity and high fatty acid saturation characteristics should be used to overcome the bottleneck of wheel wear and nickel-based alloy surface *** nano-enhancers with high hardness and spherical characteristics are better ***,a different option is available for high-strength steel grinding,which needs low-viscosity biolubricant to address the debris breaking difficulty and wheel ***,the current challenges and potential methods are proposed to promote the application of biolubricant.

关键词： grinding aerospace difficult-to-machine material biolubricant physicochemical property grindability

Fiber-reinforced composites in milling and grinding:machining bottlenecks and advanced strategies

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Frontiers of Mechanical Engineering 2022年第2期17卷 1-35页

作者： Teng GAO Yanbin ZHANG Changhe li Yiqi WANG Yun CHEN Qinglong AN Song ZHANG hao nan li Huajun CAO Hafiz Muhammad Ali Zongming ZHOU Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical Engineering Dalian University of TechnologyDalian 116024China Chengdu Tool Research Institute Co. Ltd.Chengdu 610500China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China School of Mechanical Engineering Chongqing UniversityChongqing 400044China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Hanergy(Qingdao)Lubrication Technology Co. Ltd.Qingdao 266100China Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India

Fiber-reinforced composites have become the preferred material in the fields of aviation and aerospace because of their high-strength performance in unit *** composite components are manufactured by near netshape and only require finishing operations to achieve final dimensional and assembly *** and grinding arise as the preferred choices because of their precision ***,given their laminated,anisotropic,and heterogeneous nature,these materials are considered *** undesirable results and challenging breakthroughs,the surface damage and integrity of these materials is a research hotspot with important engineering *** review summarizes an up-to-date progress of the damage formation mechanisms and suppression strategies in milling and grinding for the fiber-reinforced composites reported in the ***,the formation mechanisms of milling damage,including delamination,burr,and tear,are ***,the grinding mechanisms,covering material removal mechanism,thermal mechanical behavior,surface integrity,and damage,are ***,suppression strategies are reviewed systematically from the aspects of advanced cutting tools and technologies,including ultrasonic vibration-assisted machining,cryogenic cooling,minimum quantity lubrication(MQL),and tool optimization *** vibration shows the greatest advantage of restraining machining force,which can be reduced by approximately 60%compared with conventional *** cooling is the most effective method to reduce temperature with a maximum reduction of approximately 60%.MQL shows its advantages in terms of reducing friction coefficient,force,temperature,and tool ***,research gaps and future exploration directions are prospected,giving researchers opportunity to deepen specific aspects and explore new area for achieving high precision surface machining of fiber-reinforced composites.

关键词： milling grinding fiber-reinforced composites damage formation mechanism delamination material removal mechanism surface integrity minimum quantity lubrication

Minimum quantity lubrication machining of aeronautical materials using carbon group nanolubricant: From mechanisms to application

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Chinese Journal of Aeronautics 2022年第11期35卷 85-112页

作者： Xin CUI Changhe li Wenfeng Ding Yun CHEN Cong MAO Xuefeng XU Bo liU Dazhong WANG hao nan li Yanbin ZHANG Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafiz Muhammad Ali Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Chengdu Tool Research Institute Co. Ltd.Chengdu 610500China College of Automotive and Mechanical Engineering Changsha Universiy of Science and TechnologyChangsha 410ll14China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China Sichuan Future Aerospace Industry LLC. Shifang 618400China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Aerospace Universiy of Notingham Ningbo ChinaNingbo 315100China College of Engineering Universityof SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering and Advanced Materials Science Council of Scientific and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Regional Center for Extension and DevelopmentJalandhar 144021India

It is an inevitable trend of sustainable manufacturing to replace flood and dry machining with minimum quantity lubrication(MQL)***,for aeronautical difficult-tomachine materials,MQL couldn’t meet the high demand of cooling and lubrication due to high heat generation during ***-biolubricants,especially non-toxic carbon group nano-enhancers(CGNs)are used,can solve this technical ***,the machining mechanisms under lubrication of CGNs are unclear at complex interface between tool and workpiece,which characterized by high temperature,pressure,and speed,limited its application in factories and necessitates in-depth *** fill this gap,this study concentrates on the comprehensive quantitative assessment of tribological characteristics based on force,tool wear,chip,and surface integrity in titanium alloy and nickel alloy machining and attempts to answer mechanisms ***,to establish evaluation standard,the cutting mechanisms and performance improvement behavior covering antifriction,antiwear,tool failure,material removal,and surface formation of MQL were ***,the unique film formation and lubrication behaviors of CGNs in MQL turning,milling,and grinding are *** influence law of molecular structure and micromorphology of CGNs was also answered and optimized options were recommended by considering diverse boundary ***,in view of CGNs limitations in MQL,the future development direction is proposed,which needs to be improved in thermal stability of lubricant,activity of CGNs,controllable atomization and transportation methods,and intelligent formation of processing technology solutions.

关键词： Aerospace materials Carbon nanoparticles Grinding Lubrication mechanism Milling Minimum quantity lubrication Turning

Advances in fabrication of ceramic corundum abrasives based on sol–gel process

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Chinese Journal of Aeronautics 2021年第6期34卷 1-17页

作者： Baoteng HUANG Changhe li Yanbin ZHANG Wenfeng DING Min YANG Yuying YANG Han ZHAI Xuefeng XU Dazhong WANG Sujan DEBNATH Muhammad JAMIL hao nan li Hafiz Muhammad Ali Munish Kumar GUPTA Zafar SAID School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics cand AstronauticsNanjing 210016China Qingdao Sisa Abrasives Co. LtdQingdao 266555China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China Department of Mechanical Engineering Curtin UniversityMiri 98009Malaysia School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China Department of Mechanical Engineering King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Key Lab High Efficiency and Clean Mech Manufacture Shandong UniversityJinan 250100China Deparment of Sustainable and Renewable Energy Engineering University of SharjahSharjah 27272United Arab Emirates

Corundum abrasives with good chemical stability can be fabricated into various free abrasives and bonded abrasive tools that are widely used in the precision machining of various ***,these abrasives cannot satisfy the machining requirements of difficult-to-machine materials with high hardness,high strength,and strong wearing *** superhard abrasives can machine the above-mentioned materials,their dressing and manufacturing costs are *** contrast,ceramic corundum abrasives fabricated by sol–gel method is a costeffective product between conventional and superhard *** corundum abrasives exhibit self-sharpening and high *** this review,the optimization methods of ceramic corundum abrasive properties are introduced from three aspects:precursor synthesis,particle shaping,and ***,the functional mechanism of seeds and additives on the microstructural and mechanical properties of abrasives is ***,seeds can reduce the phase transition temperature and improve fracture *** grain size and uniformly dense structure can be controlled by applying an appropriate amount of multicomponent ***,the urgent need of engineering application and machinability of special shape ceramic corundum abrasives is reviewed,and three methods of abrasive shaping are *** micromold replication technique is highly advanced and can be used to prepare functional ***,the influence of a new sintering method,namely,two-step sintering technique,on the microstructural and mechanical performance of ceramic corundum abrasives is ***,the challenge and developmental trend of the optimization of ceramic corundum abrasives are prospected.

关键词： Ceramic corundum abrasive Seed Shaping technique Sintering additive Sol–Gel Two-step sintering process

nano-enhanced biolubricant in sustainable manufacturing:From processability to mechanisms

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Friction 2022年第6期10卷 803-841页

作者： Yanbin ZHANG hao nan li Changhe li Chuanzhen HUANG Hafiz Muhammad Ali Xuefeng XU Cong MAO Wenfeng DING Xin CUI Min YANG Tianbiao YU Muhammad JAMIL Munish Kumar GUPTA Dongzhou JIA Zafar SAID School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering&Automation Northeastern UniversityShenyang 110006China Industrial Engineering Department University of Engineering and Technology TaxilaTaxila 47080Pakistan School of Mechanical Engineering Shandong UniversityJinan 250061China College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhou 121001China College of Engineering University of SharjahSharjah 27272United Arab Emirates

To eliminate the negative effect of traditional metal-working fluids and achieve sustainable manufacturing,the usage of nano-enhanced biolubricant(NEBL)is widely researched in minimum quantify lubrication(MQL)***'s improved tool wear and surface integrity have been preliminarily verified by experimental *** previous review papers also concluded the major influencing factors of processability including nano-enhancer and lubricant types,NEBL concentration,micro droplet size,and so ***,the complex action of NEBL,from preparation,atomization,infiltration to heat transfer and anti-friction,is indistinct which limits preparation of process specifications and popularity in *** in the complex machining process,in-depth understanding is difficult and *** fll this gap,this paper concentrates on the comprehensive quantitative assessment of processability based on tribological,thermal,and machined surface quality aspects for NEBL application in turning,milling,and *** it attempts to answer mechanisms systematically considering multi-factor influence of molecular structure,physicochemical properties,concentration,and ***,this paper reveals advanced lubrication and heat transfer mechanisms of NEBL by quantitative comparison with biolubricant-based MQL ***,the distinctive filmformation,atomization,and infiltration mechanisms of NEBL,as distinguished from metal-working fluid,are clarified combining with its unique molecular structure and physical ***,the process optimization strategy is concluded based on the synergistic relationship analysis among process variables,physicochemical properties,machining mechanisms,and performance of ***,the future development directions are put forward aiming at current performance limitations of NEBL,which requires improvement on preparation and jet methods *** paper will help scientists deeply understand effective mec

关键词： nano-enhanced biolubricant(NEBL) sustainable manufacturing minimum quantity lubrication(MQL) tribological properties machining mechanisms

Milling Force Model for Aviation Aluminum Alloy: Academic Insight and Perspective Analysis

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Chinese Journal of Mechanical Engineering 2021年第1期34卷 54-88页

作者： Zhenjing Duan Changhe li Wenfeng Ding Yanbin Zhang Min Yang Teng Gao Huajun Cao Xuefeng Xu Dazhong Wang Cong Mao hao nan li Gupta Munish Kumar Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory Mechanical Transmiss Chongqing UniversityChongqing 400044China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Educati on&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China Key Lab High Efficiency and Clean Mech Manufacture Shandong UniversityJinan 250100China College of Engineering University of Sharjah27272 SharjahUnited Arab Emirates Mechanical Engineering Department Curtin University98009 MiriMalaysia Mecha nical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Aluminum alloy is the main structural material of aircraft,launch vehicle,spaceship,and space station and is processed by ***,tool wear and vibration are the bottlenecks in the milling process of aviation aluminum *** machining accuracy and surface quality of aluminum alloy milling depend on the cutting parameters,material mechanical properties,machine tools,and other *** particular,milling force is the crucial factor to determine material removal and workpiece surface ***,establishing the prediction model of milling force is important and difficult because milling force is the result of multiparameter coupling of process *** research progress of cutting force model is reviewed from three modeling methods:empirical model,finite element simulation,and instantaneous milling force *** problems of cutting force modeling are also *** view of these problems,the future work direction is proposed in the following four aspects:(1)high-speed milling is adopted for the thin-walled structure of large aviation with large cutting depth,which easily produces high residual *** residual stress should be analyzed under this particular condition.(2)Multiple factors(e.g.,eccentric swing milling parameters,lubrication conditions,tools,tool and workpiece deformation,and size effect)should be considered comprehensively when modeling instantaneous milling forces,especially for micro milling and complex surface machining.(3)The database of milling force model,including the corresponding workpiece materials,working condition,cutting tools(geometric figures and coatings),and other parameters,should be established.(4)The effect of chatter on the prediction accuracy of milling force cannot be ignored in thin-walled workpiece milling.(5)The cutting force of aviation aluminum alloy milling under the condition of minimum quantity lubrication(mql)and nanofluid mql should be predicted.

关键词： Milling Aluminum alloy Force model Empirical model Finite element model Instantaneous milling force model

Research and implementation of I^2C device driver under embedded linux system

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微计算机信息 2010年第11期26卷 70-72,87页

作者： ZHU nan-hao li Zheng-xiang Communication University of China Engineering Research Center of Digital Audio and Video Ministry of Education Beijing 100024 China

As an universal bus technology at present time, I2C has been widely used in the interface between CPU and other devices such as EEPROM, RTC and small LCD. The architecture of I2C driver, the relationship of some important data structure and the operation mechanism of the I2C driver have been analyzed. Finally, by taking an EEPROM chip named AT24C08 as a specific example, the flow of how to develop an I2C device driver is illustrated. In addition, the design of a new driver mode of single device with multi-drivers is realized.

关键词： linux 驱动程序 AT24C08 储存方法