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Testing development of different surface treatments on pervious concrete

Mina YEKKALAR,Liv HASELBACH,Quinn LANGFITT

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4, Pages 385-393 doi: 10.1007/s11709-016-0351-0

Abstract: pervious concrete specimens both qualitatively from personal judgements, and quantitatively through staticfriction measurements with a spring balance with respect to “slipperiness”.that the spring balance test may be an acceptable methodology for comparative analyses with respect to staticfriction.

Keywords： pervious concrete static coefficient of friction pedestrian

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Expressions for Differential and Apparent Coefficients of Static Friction

Wang Weiyuan

Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 29-32

Abstract:

Recently, scientists and engineers are interested in coefficients of static friction on micro andOn macro scale, the friction force is proportional to load, the apparent coefficients of static frictionfriction and the load.In this paper, from the definition of differential coefficients of static friction, the expressions fordifferential and apparent coefficients of static friction, 〓 and 〓 for several models are deduced.

Keywords： differential coefficients of static friction coefficients of static friction on micro or nano scale apparentcoefficients of static friction coefficients of static friction on macro scale

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Interfacial potential barrier theory of friction and wear

XU Zhongming, DING Lingyun, HUANG Ping, XU Zhongming

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3, Pages 276-282 doi: 10.1007/s11465-008-0043-0

Abstract: An interfacial potential barrier theory to calculate friction and wear is proposed by considering theThe theory suggests that the performance of friction and wear depends on the magnitude and distributionbarrier and standard interfacial potential barrier are then studied and the formulas to calculate the frictionforce, friction coefficient, and quantity of adhesion wear are derived based on the theory.The calculation results of the friction force with some existing experimental data are consistent with

Keywords： coefficient standard interfacial interaction formulas calculation

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Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 397-405 doi: 10.1007/s11465-017-0415-4

Abstract: The change in the lubrication conditions is modeled by the changes in the friction coefficients, therebydemonstrated by the mean and root mean square values calculated by the simulated responses under different friction

Keywords： dynamic response friction coefficient wind loads wind turbine gearbox

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Friction Theory for Toroidal Drive

Xu Lizhong,Huang Zhen

Strategic Study of CAE 2002, Volume 4, Issue 3, Pages 63-67

Abstract: Based on above-mentioned results, formulae of the friction coefficient between the planet and statorBased on EHL theory, formulae of the friction coefficient between the planet and stator or worm underThen, formulae of the friction coefficient between the planet and stator or worm under mixed frictionDependences of the friction coefficient between the planet and stator on the parameters under profileAnd dependences of the friction coefficient between the planet and stator on the ratio of the film thickness

Keywords： toroidal drive friction coefficient sliding factor

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Tribological properties of onion like fullerenes and NiFe

Ruixiang WANG,Yihao ZHANG,Haizhou WU

Frontiers in Energy 2021, Volume 15, Issue 1, Pages 208-212 doi: 10.1007/s11708-017-0454-x

Abstract: A novel way for a compressor to improve its coefficient of performance and enhance its reliability byrefrigeration lubricants additive were investigated using SRV (II), a multi-functional reciprocating frictionThe results showed that the friction coefficient was decreased from 0.15 to 0.04.

Keywords： refrigeration lubricants friction coefficient nano-composites reciprocating motion onion like fullerenes

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Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe

Ruixiang WANG,Yihao ZHANG,Yi LIAO

Frontiers in Energy 2020, Volume 14, Issue 3, Pages 644-648 doi: 10.1007/s11708-017-0453-y

Abstract: A novel way for a compressor to improve its coefficient of performance was proposed in this paper.Besides, the tribological properties of the nanocomposites were investigated using a four ball frictionconcentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L, the frictioncoefficient decreases from 0.13 to 0.06 which means the wear is reduced.The coefficient of performance of the compressor under the air conditioning test condition can be raised

Keywords： rotary compressor friction coefficient nanocomposite materials coefficient of performance fullerenes

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Coulomb-type solutions for passive earth pressure with steady seepage

WANG Junjie, CHAI Hejun, LIN Xin, XU Jiamei

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1, Pages 56-66 doi: 10.1007/s11709-008-0001-2

Abstract: on the general solutions, the variations of the critical inclination of the failure surface and the coefficientof passive earth pressure with increasing the effective friction angle of the soil mass, the soil/structurefriction angle, and the water/soil unit weight ratio are discussed.

Keywords： function coefficient Coulomb-type effective friction different drainage

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Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers

ZHANG Ruihua, CHEN Haichu

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4, Pages 433-438 doi: 10.1007/s11465-007-0074-y

Abstract: actuator influenced by the mass of the metal sphere of the micro actuator, driving signal frequency, frictioncoefficient of the contact surface between the metal sphere and the friction block of the micro driving

Keywords： spherical micro-gripper friction coefficient dynamic frequency

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Analysis of nonlinear channel friction inverse problem

CHENG Weiping, LIU Guohua

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 205-210 doi: 10.1007/s11709-007-0024-0

Abstract: decomposition (SVD) for general inverse matrices and the optimization algorithm are used to solve the channel frictionThe resolution and covariance friction inverse model in matrix form is developed to examine the reliability

Keywords： singular SVD second-order covariance Theoretical

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A Comparative Study of Friction Self-Piercing Riveting and Self-Piercing Riveting of Aluminum Alloy AA5182 Article

Yunwu Ma,He Shan,Sizhe Niu,Yongbing Li,Zhongqin Lin,Ninshu Ma

Engineering 2021, Volume 7, Issue 12, Pages 1741-1750 doi: 10.1016/j.eng.2020.06.015

Abstract:

In this paper, self-piercing riveting (SPR) and friction self-piercing riveting (F-SPR) processesout to compare the two processes in terms of joint macrogeometry, tooling force, microhardness, quasi-staticbonding enhanced the F-SPR joint stiffness under lap-shear loading, which contributed to the higher quasi-static

Keywords： Self-piercing riveting Friction self-piercing riveting Mechanical joining Quasi-static strength Fatigue

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Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Frontiers in Energy 2011, Volume 5, Issue 1, Pages 83-92 doi: 10.1007/s11708-010-0125-7

Abstract: The discussion is related to the effect of leakage and friction on the design limit (cooling capacityThe largest friction originates from the clearance among the end face of the eccentric shaft, the endcapacity of the meso Wankel compressor increases the proportion of leakage to displacement and causes the coefficient

Keywords： meso-scale Wankel compressor leakage friction

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A multi-probe micro-fabrication apparatus based on the friction-induced fabrication method

Zhijiang WU, Chenfei SONG, Jian GUO, Bingjun YU, Linmao QIAN

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4, Pages 333-339 doi: 10.1007/s11465-013-0276-4

Abstract:

A novel multi-probe micro-fabrication apparatus was developed based on the friction-induced fabricationCombining the friction-induced scanning with selective etching in KOH solution, various micro-patternsefficiency fabrication device, the multi-probe micro-fabrication apparatus may encourage the development of friction-induced

Keywords： friction-induced fabrication silicon surface texture friction multi-probe

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Damage detection in beam-like structures using static shear energy redistribution

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12, Pages 1552-1564 doi: 10.1007/s11709-022-0903-4

Abstract: In this study, a static shear energy algorithm is presented for the damage assessment of beam-like structuresTherefore, the change in the static shear energy is employed to determine the damage locations in beam-likeThe static shear energy is derived from the spectral factorization of the elementary stiffness matrix

Keywords： damage detection beam structure strain energy static displacement variation energy damage index

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Study on anti-sliding stability of hydraulic structures on subbed soils (continued)

Zhou Junliang

Strategic Study of CAE 2011, Volume 13, Issue 9, Pages 22-30

Abstract: after spring back influenced of subbed soil is determined; envelope of anti-sliding shear stress and frictioncoefficient are also quantitatively determined.

Keywords： anti-sliding test of dragged concreting pressure plate strength envelop of shear stress friction coefficient