Experimental and Numerical Analysis of Soft Elastohydrodynamic Lubrication in Line Contact

Fang, Yanfei; He, Jun; Huang, Ping

doi:10.1007/s11249-017-0825-9

Cited by 10 publications

(10 citation statements)

References 24 publications

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“…where f is the material stress fringe coefficient, which depends on the birefringent material type and the wavelength of incident light. This parameter can be determined by using pure bending beam experiments [15] or a disk under diametral compression tests [28]; N is the…”

Section: Photoelasticity Methodsmentioning

confidence: 99%

“…The transparent block was made by epoxy resin with dimensions of 80 mm × 50 mm × 4 mm for the width, height, and thickness, respectively. The epoxy resin stress fringe coefficient was determined to be 14.6 kN/ (m•fringe) using a four-point bending test [15]. The slider Table 1.…”

Section: Experimental Apparatus Materials and Testsmentioning

confidence: 99%

“…In this way, it is possible to observe the principal stress difference field (isochromatic) and its direction (isoclinic) in an area of interest. Many studies have applied this method to contact stress analysis [13][14][15][16][17]. It appears that many techniques have been used to analyze the images obtained to find the isochromatic field and isoclinic field [17][18][19][20][21][22]; however, directly determining the stress distribution on the contact surface is still a difficult problem.…”

Section: Introductionmentioning

confidence: 99%

“…It appears that many techniques have been used to analyze the images obtained to find the isochromatic field and isoclinic field [17][18][19][20][21][22]; however, directly determining the stress distribution on the contact surface is still a difficult problem. Recently, Fang et al [15] studied the application of photoelasticity combined with numerical simulation to stress analysis under elastohydrodynamic lubrication conditions. Hariprasad et al [14] proposed fringe order distribution along the section beneath the contact surface of a flat punch with different friction coefficients.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and simulation analyses of the stress field of slider-on-block contact for static and slip states

et al. 2020

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Contact problems have been widely investigated for many years. However, there are few reports on the real-time observation of shear stress evolution in friction process by experimental method. In this paper, the plane stress fields of slider-on-block contact in different contact states were observed by photoelasticity experiments and finite element simulation. In the static state, the slider is only subjected to a normal force by an L-shaped body above the slider while the block is fixed. However, in the slip state, the block is moved, and the slider is acted upon by normal and tangential forces. In both cases, the principal stress difference fields in the block obtained by photoelasticity and simulation were basically consistent. Additionally, based on simulation, the distributions of pressure and frictional stress on the contact surface were determined; the influences of the load and friction coefficient on the contact stress distributions were also investigated. Accordingly, some principles for contact stress distribution were obtained. The combination of experimental and simulation methods aims to be complementary, helping to better understand the nature of the contact stress field.

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Section: Photoelasticity Methodsmentioning

confidence: 99%

Section: Experimental Apparatus Materials and Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and simulation analyses of the stress field of slider-on-block contact for static and slip states

et al. 2020

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“…As the thickness of such films is usually at micron or sub-micron scales and the films normally located at a closed space, accurate measurement is very difficult to achieve. Until now, there are several techniques available to do this measurement based on the electrical, 1–3 optical, 4,5 or acoustic 6–11 characteristics of the oil film layer. The electrical methods obtain the oil film thickness via the resistance or capacitance of the oil film layer.…”

Section: Introductionmentioning

confidence: 99%

An ultrasonic measurement method for full range of oil film thickness

Zhang

Dou

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Ultrasonic method is quite promising for oil film thickness measurement in industry, while there is normally a dead zone for one ultrasonic sensor with a special center frequency when measuring the oil film thickness by the traditional reflection coefficient amplitude. In this paper, an ultrasonic measurement method for full range of oil film thickness was investigated. The theoretical relationship between the oil film thickness and the reflection coefficient phase was firstly built up and the reflection coefficient phase was found to be able to measure the oil film thickness in the dead zone. Then the reflection coefficient amplitude and phase were combined to measure the oil film thickness in the full range. A high-precision calibrated rig, which could form a series of known film thicknesses oil layers, was set up and the performance of this method was shown to work well. This method is significant for online oil film thickness monitoring in industry.

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Instantaneous Plane Stress Observation and Numerical Simulation During Wear in an Initial Line Contact

et al. 2018

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Experimental and Numerical Analysis of Soft Elastohydrodynamic Lubrication in Line Contact

Cited by 10 publications

References 24 publications

Experimental and simulation analyses of the stress field of slider-on-block contact for static and slip states

Experimental and simulation analyses of the stress field of slider-on-block contact for static and slip states

An ultrasonic measurement method for full range of oil film thickness

Instantaneous Plane Stress Observation and Numerical Simulation During Wear in an Initial Line Contact

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