Convenient formulas for modeling three-dimensional thermo–mechanical asperity contacts

Liu, G.; Wang, Q.; Ao, Y.

doi:10.1016/s0301-679x(02)00022-1

Cited by 18 publications

(9 citation statements)

References 13 publications

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“…When the realistic engineering surfaces slide against one another, the frictional heat is generated by their contact area, which is a set of discontinuous asperities with different sizes and varied shapes. Then the system of heat generation on frictional surfaces can be modeled as finite heat sources moving on a half-infinite homogeneous body (Liu et al, 2002;Mandelbrot, 1986;Majumdar and Bhushan, 1991), as shown in Figure 1. It consists of two contacting semi-infinite regions, the rough surface with normal load F and the flat one move with the sliding velocity V in the y-direction, and the frictional thermal energy will disappear to these two bodies (assumption that there is no energy consumption).…”

Section: Mathematic Model Of Friction Heatmentioning

confidence: 99%

A three-dimensional fusion prediction model for fractal rough surfaces in the sliding contact process

Zuo-min

2014

Industrial Lubrication and Tribology

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Purpose -The purpose of this manuscript is to analyze the fusion micro-zone generated by typical rough surfaces and investigate the factors of thermal effects on the tribological performance of surface asperities and its results verified by the experiment. Design/methodology/approach -A three-dimensional fractal rough surfaces sliding contact model has been developed, which takes into account temperature rise and distribution. The finite-element method, Green's function method, thermal conduct theory and contact mechanics are used as the solution methods. Findings -The results yield insights into the effects of the sliding velocity, thermal properties of the material, normal load and surface roughness on the temperature rise of the sliding contact surface. It allows the specification of working conductions' properties to reduce fusion. Originality/value -The model is developed and described by using the features of the contact between one flat surface and one rough surface with varied topographies. It can be easily applied for solving the sliding contact problems with different working conditions and specified for designing the surface accuracy in the severe working condition.

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Section: Mathematic Model Of Friction Heatmentioning

confidence: 99%

A three-dimensional fusion prediction model for fractal rough surfaces in the sliding contact process

Zuo-min

2014

Industrial Lubrication and Tribology

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“…When the true engineering surfaces slide over each other, the frictional heat is generated by the contact area which is a set of discontinuous asperities with different sizes, varied shapes. Then the system of heat generation on frictional surfaces can be modeled as finite heat sources moving on half-infinite homogeneous body [7][8][9], as shown in Figure 1. It consists of two contacting semi-infinite regions, the rough surface with normal load F and the flat one move with the sliding velocity V in the y-direction and the frictional thermal will disappear to these two bodies (without considering the consumption of energy).…”

Section: Mathematic Model Of Friction Heatmentioning

confidence: 99%

Prediction Model of the Fusion Microzone on Sliding Contact Surface

Zuo-min

2011

ISRN Mechanical Engineering

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The current paper is motivated by the need to understand the factors in generating the fusion microzone in sliding systems. The objectives are to analyze the different elements' varied influence on the engineering surface's temperature rise. The current paper developed the prediction model based on the thermal conduct theory. A solution based on the Green's function method is combined with the grid method for calculating the temperature rise and distribution. The research indicates that: frictional heat is closely related to the sliding velocity, its value is in proportion to the sliding velocity; the thermal properties of the material are one of the key points to decide the temperature rise; the load is another main factor in increasing the temperature rise; comparing with other elements, the roughness may be the least effective to the temperature rise.

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“…Huang and Ju 6 pointed out that a two-dimensional profile could not represent real engineering surface and it was necessary to establish a three-dimensional (3D) thermomechanical coupling model for analyzing. Liu and colleagues [7][8][9] extended the previous analysis to a 3D thermomechanical model of nonconforming contacts. But this model was a steady model of heat conduction.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical analysis of an elastoplastic rough body in sliding contact with flat surface and the effect of adjacent contact asperity

Huang

Gao

Chen

et al. 2015

Advances in Mechanical Engineering

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The study of the instantaneous frictional temperature, stress, and equivalent plastic strain generated when two surfaces are in frictional sliding process plays a significant role in understanding friction and wear mechanism. A thermomechanical coupling model between a rough body and a flat body is established. The model integrates the heat flux coupling between the sliding surfaces and considers the effects of the interaction among contact asperities and elastoplastic deformation of the rough body. The thermomechanical problem under this three-dimensional model is solved by the nonlinear finite element methods in ABAQUS software. The results show that the temperature, contact pressure, and stress are coupled. The results of the real contact area and the instantaneous frictional temperature, contact pressure, and VonMises equivalent stress on the local contact region fluctuate obviously due to the interaction among the adjacent contact asperities. The influence of asperity interaction is not constant but intermittent. Its time interval is related to the added interaction of a new adjacent contact asperity. The fluctuation of the VonMises equivalent stress makes the equivalent plastic strain of the frictional surface layer accumulate continually which might cause fatigue wear and plastic deformation wear of the material when the frictional rotating process was repeated.

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Convenient formulas for modeling three-dimensional thermo–mechanical asperity contacts

Cited by 18 publications

References 13 publications

A three-dimensional fusion prediction model for fractal rough surfaces in the sliding contact process

A three-dimensional fusion prediction model for fractal rough surfaces in the sliding contact process

Prediction Model of the Fusion Microzone on Sliding Contact Surface

Thermomechanical analysis of an elastoplastic rough body in sliding contact with flat surface and the effect of adjacent contact asperity

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