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Tribological Performance of Different Concentrations of Al_(2)O_(3)Nanofluids on Minimum Quantity Lubrication Milling

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 67-78页

作者： Xiufang Bai Juan Jiang Changhe Li Lan Dong Hafiz Muhammad Ali shubham sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical and Electrical Engineering Qingdao Binhai UniversityQingdao 266555China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering IK Gujral Punjab Technical UniversityMain Campus-KapurthalaJalandhar 144603India

Nanofluid minimum quantity lubrication(NMQL)is a green processing *** oil is suitable as base oil because of excellent lubrication performance,low freezing temperature,and high ***_(2)O_(3)nanoparticles improve not only the heat transfer capacity but also the lubrication *** physical and chemical proper-ties of nanofluid change when Al_(2)O_(3)nanoparticles are ***,the effects of the concentration of nanofluid on lubrication performance remain ***,the mechanisms of interaction between Al_(2)O_(3)nanoparti-cles and cottonseed oil are *** this research,nanofluid is prepared by adding different mass concentrations of Al_(2)O_(3)nanoparticles(0,0.2%,0.5%,1%,1.5%,and 2%wt)to cottonseed oil during minimum quantity lubrication(MQL)milling 45 *** tribological properties of nanofluid with different concentrations at the tool/workpiece interface are studied through macro-evaluation parameters(milling force,specific energy)and micro-evaluation parameters(surface roughness,micro morphology,contact angle).The result show that the specific energy is at the minimum(114 J/mm^(3)),and the roughness value is the lowest(1.63μm)when the concentration is 0.5 wt%.The surfaces of the chip and workpiece are the smoothest,and the contact angle is the lowest,indicating that the tribological proper-ties are the best under 0.5 wt%.This research investigates the intercoupling mechanisms of Al_(2)O_(3)nanoparticles and cottonseed base oil,and acquires the optimal Al_(2)O_(3)nanofluid concentration to receive satisfactory tribological properties.

关键词： Milling Al_(2)O_(3)nanofluid Minimum quantity lubrication(MQL) Surface micromorphology

Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication

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摩擦:英文版 2023年第11期11卷 2107-2131页

作者： Dongzhou JIA Changhe LI Jiahao LIU Yanbin ZHANG Min YANG Teng GAO Zafar SAID shubham sharma School of Mechanical&Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhou 121001China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China College of Engineering University of SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department University Center for Research and DevelopmentChandigarh UniversityMohaliPunjab 144603India

Minimum quantity lubrication(MQL)is a relatively efficient and clean alternative to flooding workpiece *** atomization has the merits of small droplet diameter,high uniformity of droplet size,and strong coating,hence its superiority to pneumatic ***,as the current research hotspot,the influence of jet parameters and electrical parameters on the average diameter of droplets is not ***,by observing the shape of the liquid film at the nozzle outlet,the influence law of air pressure and voltage on liquid film thickness(h)and transverse and longitudinal fluctuations are ***,the mathematical model of charged droplet volume average diameter(VAD)is constructed based on three dimensions of the liquid film,namely its thickness,transverse wavelength(λ_(h)),and longitudinal wavelength(λ_(z)).The model results under different working conditions are obtained by numerical *** of the model results with the experimental VAD of the droplet confirm the error of the mathematical model to be less than 10%.The droplet diameter distribution span value Rosin–Rammler distribution span(R.S)and percentage concentrations of PM10(particle size of less than 10μm)/PM2.5(particle size of less than 2.5μm)under different working conditions are further *** results show that electrostatic atomization not only reduces the diameter distribution span of atomized droplets but also significantly inhibits the formation of PM10 and PM2.5 fine-suspension *** the air pressure is 0.3 MPa,and the voltage is 40 kV,the percentage concentrations of PM10 and PM2.5 can be reduced by 80.72%and 92.05%,respectively,compared with that under the pure pneumatic atomization condition at 0.3 MPa.

关键词： minimum quantity lubrication(MQL) electrostatic atomization volume average diameter(VAD) atomization characteristics

Machinability of ultrasonic vibration-assisted micro-grinding in biological bone using nanolubricant

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Frontiers of Mechanical Engineering 2023年第1期18卷 115-130页

作者： Yuying YANG Min YANG Changhe LI Runze LI Zafar SAID Hafiz Muhammad ALI shubham sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Physics Qingdao UniversityQingdao 266071China Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Department of Sustainable and Renewable Energy Engineering University of SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering IK Gujral Punjab Technical UniversityJalandhar 144603India

Bone grinding is an essential and vital procedure in most surgical ***,the insufficient cooling capacity of dry grinding,poor visibility of drip irrigation surgery area,and large grinding force leading to high grinding temperature are the technical bottlenecks of micro-grinding.A new micro-grinding process called ultrasonic vibration-assisted nanoparticle jet mist cooling(U-NJMC)is innovatively proposed to solve the technical *** combines the advantages of ultrasonic vibration(UV)and nanoparticle jet mist cooling(NJMC).Notwithstanding,the combined effect of multi parameter collaborative of U-NJMC on cooling has not been *** grinding force,friction coefficient,specific grinding energy,and grinding temperature under dry,drip irrigation,UV,minimum quantity lubrication(MQL),NJMC,and U-NJMC micro-grinding were compared and *** showed that the minimum normal grinding force and tangential grinding force of U-NJMC micro-grinding were 1.39 and 0.32 N,which were 75.1%and 82.9%less than those in dry grinding,*** minimum friction coefficient and specific grinding energy were achieved using *** with dry,drip,UV,MQL,and NJMC grinding,the friction coefficient of U-NJMC was decreased by 31.3%,17.0%,19.0%,9.8%,and 12.5%,respectively,and the specific grinding energy was decreased by 83.0%,72.7%,77.8%,52.3%,and 64.7%,*** with UV or NJMC alone,the grinding temperature of U-NJMC was decreased by 33.5%and 10.0%,*** results showed that U-NJMC provides a novel approach for clinical surgical micro-grinding of biological bone.

关键词： micro-grinding biological bone ultrasonic vibration(UV) nanoparticle jet mist cooling(NJMC) grinding force grinding temperature

Surveying the genomic landscape of silage-quality traits in maize(Zea mays L.)

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The Crop Journal 2023年第6期11卷 1893-1901页

作者： Jatin sharma shubham sharma Krishna Sai Karnatam Om Prakash Raigar Chayanika Lahkar Dinesh Kumar Saini Sushil Kumar Alla Singh Abhijit Kumar Das Priti sharma Ramesh Kumar Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhianaPunjab 141004India School of Agricultural Biotechnology Punjab Agricultural UniversityLudhianaPunjab 141004India ICAR-Indian Institute of Maize Research LudhianaPunjab 141004India Department of Plant and Soil Science Texas Tech UniversityLubbockTX 79409-2122USA

Despite the longstanding importance of silage as a critical feed source for ruminants,its quality improvement has been largely *** numerous quantitative trait loci(QTL)and genes affecting silage quality in maize have been reported,only a few have been effectively incorporated into breeding *** this gap,the present study undertook a comprehensive meta-QTL(MQTL)analysis involving 523 QTL associated with silage-quality traits collected from 14 published *** the 523 QTL,405 were projected onto a consensus map comprising 62,424 genetic markers,resulting in the identification of 60 MQTL and eight *** average confidence interval(CI)of the MQTL was 3.9-fold smaller than that of the source *** of the 60 identified MQTL were classified as breeder’s MQTL owing to their small CIs,involvement of more QTL,and large contribution to phenotypic ***-third of the MQTL co-localized with DNA marker-trait associations identified in previous genomewide association mapping studies.A set of 78 high-confidence candidate genes influencing silage quality were identified in the MQTL *** genes and associated markers may advance marker-assisted breeding for maize silage quality.

关键词： Meta-QTL Silage quality Maize GWAS Candidate genes

Development of Non-enzymatic Cholesterol Electrochemical Sensor Based on Polyindole/Tungsten Carbide Nanocomposite

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Journal of Analysis and Testing 2020年第1期4卷 13-22页

作者： shubham sharma Preeti Joshi Sameena Mehtab Md.Ghulam Haider Zaidi Kavita Singhal Tanveer Irshad Siddiqi Department of Chemistry College of Basic Sciences and HumanitiesG.B.Pant University of Agriculture and TechnologyPantnagarUttarakhand 263145India Department of Chemistry D.I.T UniversityMussoorie Diversion RoadMakkawalaDehradunUttarakhand 248001India

Non-enzymatic electrochemical sensor was developed for estimation of low-level ***/tungsten carbide(PIN/WC)nanocomposite was synthesized and used as an electroactive material to develop low-cost modified stainless steel plate electrode(SSPE).Surface morphology of developed electrode was characterized by scanning electron *** behavior of cholesterol was investigated through electron impedance spectroscopy,potentiodynamic polarization and cyclic voltammetry in 1-M KOH electrolytic *** quantification of cholesterol was studied by square wave voltammetry and differential pulse *** calibration plots between the cholesterol concentration and peak current were in linear relation with limit of detection of 1.23×10^(−6) mol L^(−1).The overall result reveals that developed PIN/WC/SSPE electrode has excellent performance for trace-level cholesterol estimation and can be further employed for cholesterol monitoring in blood serum samples.

关键词： Electrochemical sensor Polyindole Nanocomposite Cholesterol Voltammetric techniques

Vegetable Oil-Based Nanolubricants in Machining:From Physicochemical Properties to Application

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 4-42页

作者： Xiaotian Zhang Changhe Li Zongming Zhou Bo Liu Yanbin Zhang Min Yang Teng Gao Mingzheng Liu Naiqing Zhang Zafar Said shubham sharma Hafiz Muhammad Ali School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Hanergy(Qingdao)Lubrication Technology Co. Ltd.Qingdao 266200China Sichuan Future Aerospace Industry LLC. Shifang 618400China Shanghai Jinzhao Energy Saving Technology Co. Ltd.Shanghai 200436China Department of Sustainable and Renewable Energy Engineering University of Sharjah27272 SharjahUnited Arab Emirates Department of Mechanical Engineering and Advanced Materials Science Regional Center for Extension and DevelopmentCouncil of Scientific and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Jalandhar 144021India Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Cutting fluid is crucial in ensuring surface quality and machining accuracy during ***,traditional mineral oil-based cutting fluids no longer meet modern machining’s health and environmental protection *** a renewable,pollution-free alternative with excellent processing characteristics,vegetable oil has become an inevitable ***,vegetable oil lacks oxidation stability,extreme pressure,and antiwear proper-ties,which are essential for machining *** physicochemical characteristics of vegetable oils and the improved methods’application mechanism are not fully *** study aims to investigate the effects of viscosity,surface tension,and molecular structure of vegetable oil on cooling and lubricating *** mechanisms of autoxidation and high-temperature oxidation based on the molecular structure of vegetable oil are also *** study further investigates the application mechanism and performance of chemical modification and antioxidant *** study shows that the propionic ester of methyl hydroxy-oleate obtained by epoxidation has an initial oxidation temperature of 175℃.The application mechanism and extreme pressure performance of conventional extreme pressure additives and nanoparticle additives were also investigated to solve the problem of insufficient oxidation resistance and extreme pressure performance of nanobiological ***,the study discusses the future prospects of vegetable oil for chemical modification and nanoparticle *** study provides theoretical guidance and technical support for the industrial application and scientific research of vegetable oil in the field of lubrication and *** is expected to promote sustainable development in the manufacturing industry.

关键词： Cutting fluid Vegetable oil Chemical modification Antioxidant Extreme pressure additive Minimum quality lubrication

Temperature field model in surface grinding: a comparative assessment

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International Journal of Extreme Manufacturing 2023年第4期5卷 314-373页

作者： Min Yang Ming Kong Changhe Li Yunze Long Yanbin Zhang shubham sharma Runze Li Teng Gao Mingzheng Liu Xin Cui Xiaoming Wang Xiao Ma Yuying Yang School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdaoPeople’s Republic of China College of Physics Qingdao UniversityQingdaoPeople’s Republic of China Department of Mechanical Engineering University Centre for Research and DevelopmentChandigarh UniversityMohaliIndia Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMAUnited States of America School of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)JinanPeople’s Republic of China

Grinding is a crucial process in machining workpieces because it plays a vital role in achieving the desired precision and surface ***,a significant technical challenge in grinding is the potential increase in temperature due to high specific energy,which can lead to surface thermal ***,ensuring control over the surface integrity of workpieces during grinding becomes a critical *** necessitates the development of temperature field models that consider various parameters,such as workpiece materials,grinding wheels,grinding parameters,cooling methods,and media,to guide industrial *** study thoroughly analyzes and summarizes grinding temperature field ***,the theory of the grinding temperature field is investigated,classifying it into traditional models based on a continuous belt heat source and those based on a discrete heat source,depending on whether the heat source is uniform and *** this examination,a more accurate grinding temperature model that closely aligns with practical grinding conditions is ***,various grinding thermal models are summarized,including models for the heat source distribution,energy distribution proportional coefficient,and convective heat transfer *** comprehensive research,the most widely recognized,utilized,and accurate model for each category is *** application of these grinding thermal models is reviewed,shedding light on the governing laws that dictate the influence of the heat source distribution,heat distribution,and convective heat transfer in the grinding arc zone on the grinding temperature ***,considering the current issues in the field of grinding temperature,potential future research directions are *** aim of this study is to provide theoretical guidance and technical support for predicting workpiece temperature and improving surface integrity.

关键词： grinding temperature uniform continuous temperature field nonuniform discontinuous temperature field heat source distribution model grinding heat distribution coefficient model convective heat transfer coefficient model

Analysis of grinding mechanics and improved grinding force model based on randomized grain geometric characteristics

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Chinese Journal of Aeronautics 2023年第7期36卷 160-193页

作者： Mingzheng LIU Changhe LI Yanbin ZHANG Min YANG Teng GAO Xin CUI Xiaoming WANG Wenhao XU Zongming ZHOU Bo LIU Zafar SAID Runze LI shubham sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Hanergy(Qingdao)Lubrication Technology Co. LTDQingdao 266520China Sichuan Future Aerospace Industry LLC Shifang 618400China Department of Sustainable and Renewable Energy Engineering University of SharjahSharjah 27272United Arab Emirates Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089–1111USA Department of Mechanical Engineering I.K.Gujral Punjab Technical UniversityJalandhar 144603India

Too high grinding force will lead to a large increase in specific grinding energy, resulting in high temperature in grinding zone, especially for the aerospace difficult cutting metal materials,seriously affecting the surface quality and accuracy. At present, the theoretical models of grinding force are mostly based on the assumption of uniform or simplified morphological characteristics of grains, which is inconsistent with the actual grains. Especially for non-engineering grinding wheel,most geometric characteristics of grains are ignored, resulting in the calculation accuracy that cannot guide practical production. Based on this, an improved grinding force model based on random grain geometric characteristics is proposed in this paper. Firstly, the surface topography model of CBN grinding wheel is established, and the effective grain determination mechanism in grinding zone is revealed. Based on the known grinding force model and mechanical behavior of interaction between grains and workpiece in different stages, the concept of grain effective action area is proposed. The variation mechanism of effective action area under the influence of grain geometric and spatial characteristics is deeply analyzed, and the calculation method under random combination of five influencing parameters is obtained. The numerical simulation is carried out to reveal the dynamic variation process of grinding force in grinding zone. In order to verify the theoretical model, the experiments of dry grinding Ti-6Al-4 V are designed. The experimental results show that under different machining parameters, the results of numerical calculation and experimental measurement are in good agreement, and the minimum error value is only 2.1 %, which indicates that the calculation accuracy of grinding force model meets the requirements and is feasible. This study will provide a theoretical basis for optimizing the wheel structure, effectively controlling the grinding force range, adjusting the grindi

关键词： Effective action area Grinding force Improved model Mechanical behaviour Randomized grain

Material Removal Mechanism and Force Modeling in Ultrasonic Vibration-Assisted Micro-Grinding Biological Bone

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 20-44页

作者： Jingang Sun Changhe Li Zongming Zhou Bo Liu Yanbin Zhang Min Yang Teng Gao Mingzheng Liu Xin Cui Benkai Li Runze Li Yusuf Suleiman Dambatta shubham sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Hanergy(Qingdao)Lubrication Technology Co. Ltd.Qingdao 266520China Sichuan Future Aerospace Industry LLC. Shifang 618400China Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Mechanical Engineering Department Ahmadu Bello UniversityZaria 810106Nigeria Department of Mechanical Engineering and Advanced Materials Science Regional Center for Extension and DevelopmentCouncil of Scientifc and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Jalandhar 144021India

Micro-grinding with a spherical grinding head has been deemed an indispensable method in high-risk surgeries, such as neurosurgery and spine surgery, where bone grinding has long been plagued by the technical bottleneck of mechanical stress-induced crack damage. In response to this challenge, the ultrasound-assisted biological bone micro-grinding novel process with a spherical grinding head has been proposed by researchers. Force modeling is a prerequisite for process parameter determination in orthopedic surgery, and the difculty in establishing and accurately predicting bone micro-grinding force prediction models is due to the geometric distribution of abrasive grains and the dynamic changes in geometry and kinematics during the cutting process. In addressing these critical needs and technical problems, the shape and protrusion heights of the wear particle of the spherical grinding head were frst studied, and the gradual rule of the contact arc length under the action of high-speed rotating ultrasonic vibration was proposed. Second, the mathematical model of the maximum thickness of undeformed chips under ultrasonic vibration of the spherical grinding head was established. Results showed that ultrasonic vibration can reduce the maximum thickness of undeformed chips and increase the range of ductile and bone meal removals, revealing the mechanism of reducing grinding force. Further, the dynamic grinding behavior of diferent layers of abrasive particles under diferent instantaneous interaction states was studied. Finally, a prediction model of micro-grinding force was established in accordance with the relationship between grinding force and cutting depth, revealing the mechanism of micro-grinding force transfer under ultrasonic vibration. The theoretical model’s average deviations are 10.37% in x-axis direction, 6.85% in y-axis direction, and 7.81% in z-axis direction compared with the experimental results. This study provides theoretical guidance and technical sup

关键词： Spherical grinding head Gradual contact arc length Maximum undeformed chip thickness Microgrinding force