Advances in Tribology最新文献_第7页

Experimental Evaluation of Erosion of Gunmetal under Asymmetrical Shaped Sand Particle 非对称型砂颗粒对枪械金属侵蚀的试验评价

IF 2.6

Advances in Tribology Pub Date : 2015-12-07 DOI: 10.1155/2015/815179

M. Chowdhury, U. K. Debnath, D. M. Nuruzzaman, M. Islam

{"title":"Experimental Evaluation of Erosion of Gunmetal under Asymmetrical Shaped Sand Particle","authors":"M. Chowdhury, U. K. Debnath, D. M. Nuruzzaman, M. Islam","doi":"10.1155/2015/815179","DOIUrl":"https://doi.org/10.1155/2015/815179","url":null,"abstract":"The erosion characteristics of gunmetal have been evaluated practically at different operating conditions. Asymmetrical silica sand (SiO2) is taken into account as erodent within range of 300–600 μm. The impact velocity within 30–50 m/sec, impact angle 15–900, and stand off distance 15–25 mm are inspected as other relevant operating test conditions. The maximum level of erosion is obtained at impact angle 15° which indicates the ductile manner of the tested gunmetal. The higher the impact velocity, the higher the erosion rate as almost linear fashion is observed. Mass loss of gunmetal reduces with the increase of stand-off distance. A dimensional analysis, erosion efficiency (η), and relationship between friction and erosion indicate the prominent correlation. The test results are designated using Taguchi’s and ANOVA concept. ratio indicates that there are 1.72% deviations that are estimated between predicted and experimental results. To elaborately analyze the results, ANN and GMDH methods are mentioned. After erosion process of tested composite, the damage propagation on surfaces is examined using SEM for the confirmation of possible nature of wear behavior. The elemental composition of eroded test samples at varying percentage of gunmetal is analyzed by EDX analysis.","PeriodicalId":44668,"journal":{"name":"Advances in Tribology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2015/815179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65163086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Microstructure Characteristics and Properties of HVOF Sprayed Ni-Based Alloy Nano-h-BN Self-Lubricating Composite Coatings HVOF喷涂ni基合金纳米h- bn自润滑复合涂层的组织特征与性能

IF 2.6

Advances in Tribology Pub Date : 2015-11-25 DOI: 10.1155/2015/621278

Xiao-feng Zhang, Long Zhang, Z. Huang

引用次数: 5

A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm) 聚合物缩醛齿轮(直齿、斜齿、锥齿轮和蜗杆)磨损特性通用试验台的新设计

IF 2.6

Advances in Tribology Pub Date : 2015-09-03 DOI: 10.1155/2015/926918

S. Yousef, T. Osman, M. Khattab, A. Bahr, A. Youssef

{"title":"A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm)","authors":"S. Yousef, T. Osman, M. Khattab, A. Bahr, A. Youssef","doi":"10.1155/2015/926918","DOIUrl":"https://doi.org/10.1155/2015/926918","url":null,"abstract":"This work aims to study the wear characterization of common types of acetal polymer gears (spur, helical, bevel, and worm) using a new TS universal test rig, in order to obtain reliable results and as a reference when compared with acetal nanocomposite gears later. The TS universal test rig consists of three different units that are connected by a main driver shaft and a pair of constantly meshing metal spur gears, which transfer power to the bevel and worm test units. The first unit is used to test the bevel gears, the second unit is used to test the spur and helical gears, and the third unit is used to test the worm gears. The loading mechanism is similarly designed to block the brake mechanism. Hobbing and milling machines were used to machine an injection-moulded polymer flanges and produce the tested gears. All gear pairs, except the worm gear, have identical gear ratios. The experiments were performed at speed 1420 rpm and the torque was 4 Nm. The results showed that the wear rates (in the form of weight loss) of spur gears were consistent with the previous results and the other gear types had larger wear rates.","PeriodicalId":44668,"journal":{"name":"Advances in Tribology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2015-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2015/926918","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64166344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Effect of Ratio on the Performance of Two-Lobe Pressure Dam Bearing: Micropolar Lubricated 比值对双叶压坝轴承性能的影响:微极润滑

IF 2.6

Advances in Tribology Pub Date : 2015-02-25 DOI: 10.1155/2015/182713

Sanyam Sharma, C. M. Krishna

引用次数: 11

Couple Stress Squeeze Films with VPD in a Curved Circular Geometry 弯曲圆形几何中与VPD耦合的应力挤压膜

IF 2.6

Advances in Tribology Pub Date : 2015-02-11 DOI: 10.1155/2015/164691

V. Ponnuswamy, S. Govindaraj

引用次数: 2

Effect of Surface Roughness on the Squeeze Film Characteristics of Circular Plates in the Presence of Conducting Couplestress Fluid and Transverse Magnetic Field 导电耦合应力流体和横向磁场作用下，表面粗糙度对圆板挤压膜特性的影响

IF 2.6

Advances in Tribology Pub Date : 2015-01-29 DOI: 10.1155/2015/302396

S. T. Fathima, N. Naduvinamani, J. S. Kumar, B. Hanumagowda

引用次数: 5

Prediction and Analysis of Engine Friction Power of a Diesel Engine Influenced by Engine Speed, Load, and Lubricant Viscosity 转速、负荷和润滑油粘度对柴油机摩擦功率影响的预测与分析

IF 2.6

Advances in Tribology Pub Date : 2014-12-09 DOI: 10.1155/2014/928015

D. Singh, F. Gu, J. Fieldhouse, N. Singh, S. K. Singal

{"title":"Prediction and Analysis of Engine Friction Power of a Diesel Engine Influenced by Engine Speed, Load, and Lubricant Viscosity","authors":"D. Singh, F. Gu, J. Fieldhouse, N. Singh, S. K. Singal","doi":"10.1155/2014/928015","DOIUrl":"https://doi.org/10.1155/2014/928015","url":null,"abstract":"Automotive industries made a paradigm shift in selection of viscometrics of engine lubricant, from higher to lower viscosity grade, for improving fuel economy of vehicles. Engine fuel consumption is influenced by friction between the various engine components. Engine friction power (FP) of a direct injection diesel engine is calculated from the measured value of in-cylinder pressure signals at various operating conditions. For predicting FP, as a function of speed, load, and lubricant viscosity, a full factorial design of experiments (DOE) was formulated and an empirical correlation was developed. Response surface methodology (RSM) was used for analyzing the dominant parameters and their interactions, which influence engine friction power significantly. Predicted results of engine FP are in good agreement with measured values at all operating points. ANOVA and RSM analysis revealed that the significant parameters influencing engine FP are speed, load, viscosity, speed-load, and speed-viscosity. The effect of engine lubricant viscosity on friction power of a diesel engine was insignificant at low speed, whereas, at high speed, it played a vital role. The empirical relation developed for predicting FP is very useful in estimating engine friction power for various combinations of engine speeds, loads, and lubricant viscosity without running the engine.","PeriodicalId":44668,"journal":{"name":"Advances in Tribology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2014-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2014/928015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64747406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Dynamic Mechanical Analysis and Three-Body Abrasive Wear Behaviour of Thermoplastic Copolyester Elastomer Composites 热塑性共聚酯弹性体复合材料的动态力学分析及三体磨粒磨损行为

IF 2.6

Advances in Tribology Pub Date : 2014-11-19 DOI: 10.1155/2014/210187

H. Rajashekaraiah, Sekar Mohan, P. K. Pallathadka, Suresha Bhimappa

引用次数: 30

Jet-Impingement Effects of Alumina-Nanofluid on Aluminum and Copper 氧化铝纳米流体对铝和铜的射流冲击效应

IF 2.6

Advances in Tribology Pub Date : 2014-08-21 DOI: 10.1155/2014/476175

G. Molina, Fnu Aktaruzzaman, Whitney Stregles, V. Soloiu, Mosfequr Rahman

{"title":"Jet-Impingement Effects of Alumina-Nanofluid on Aluminum and Copper","authors":"G. Molina, Fnu Aktaruzzaman, Whitney Stregles, V. Soloiu, Mosfequr Rahman","doi":"10.1155/2014/476175","DOIUrl":"https://doi.org/10.1155/2014/476175","url":null,"abstract":"Nanofluids are nanosize-powder suspensions that are of interest for their enhanced thermal transport properties. They are studied as promising alternatives to ordinary cooling fluids, but the tribiological effects of nanofluids on cooling-system materials are largely unknown. The authors have developed methodology that uses jet impingement on typical cooling-system materials to test such effects. The work is presented of the authors’ research on the interactions of a typical nanofluid (2% volume of alumina nanopowders in a solution of ethylene glycol in water) which is impinged on aluminum and copper specimens for tests as long as 112 hours. The surface changes were assessed by roughness measurements and optical-microscope studies. Comparative roughness indicate that both the reference cooling fluid of ethylene glycol and water and its nanofluid with 2% alumina produce roughness changes in aluminum (even for the shortest 3-hour test), but no significant roughness differences were observed between them. No significant roughness changes were observed for copper. Microscopy observations, however, show different surface modifications in both aluminum and copper by both the nanofluid and its base fluid. The possible mechanisms of early erosion are discussed. These investigations demonstrate suitable methods for the testing of nanofluid effects on cooling system-materials.","PeriodicalId":44668,"journal":{"name":"Advances in Tribology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2014-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2014/476175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64510452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Tribological behavior of Ti-6Al-4V and Ti-6Al-7Nb Alloys for Total Hip Prosthesis 全髋关节假体用Ti-6Al-4V和Ti-6Al-7Nb合金的摩擦学行为

IF 2.6

Advances in Tribology Pub Date : 2014-07-21 DOI: 10.1155/2014/451387

M. Fellah, M. Labaiz, O. Assala, L. Dekhil, A. Taleb, Hadda Rezag, A. Iost

{"title":"Tribological behavior of Ti-6Al-4V and Ti-6Al-7Nb Alloys for Total Hip Prosthesis","authors":"M. Fellah, M. Labaiz, O. Assala, L. Dekhil, A. Taleb, Hadda Rezag, A. Iost","doi":"10.1155/2014/451387","DOIUrl":"https://doi.org/10.1155/2014/451387","url":null,"abstract":"The aim of the study is to evaluate the friction and wear behavior of high-strength alloys Ti-6Al-7Nb used in femoral stem and compare it with a Ti-6Al-4V alloy cylindrical bar corresponding to ISO 5832-3 part 3/01-07-199 standard. The tribological behavior was investigated by wear tests, using ball-on-disc and pin-on-disc tribometers. These tests consisted of measuring the weight loss and the friction coefficient of samples. The oscillating friction and wear tests have been carried out in ambient with oscillating tribotester in accordance with standards ISO 7148, ASTM G99-95a, and ASTM G133-95 under different conditions of normal loads (3, 6, and 10 N) and sliding speeds (1, 15, and 25 mm·s−1). As counter pairs, a 100Cr6 steel ball with 10 mm in diameter was used. Results show that the two alloys had similar friction and wear performance, although their grain structures and compositions are different. Occurrence of large frictional occurred, is probably caused by formation and periodic, localized fracture of a transfer layer. Higher friction with larger fluctuation and higher wear rate was observed at the higher siding speed. The Ti-6Al-4V wear mechanism transforms from ploughing and peeling off wear at low sliding speed to plastic deformation and adhesive wear.","PeriodicalId":44668,"journal":{"name":"Advances in Tribology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2014/451387","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64497237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 94