scholarly journals Analysis of the Frictional Heat Partition in Sticking-sliding Contact for Dry Machining: An Analytical-Numerical Modelling

Procedia CIRP ◽  
2017 ◽  
Vol 58 ◽  
pp. 539-542 ◽  
Author(s):  
Y. Avevor ◽  
A. Moufki ◽  
M. Nouari
Keyword(s):  
Numerical Modelling ◽  
Sliding Contact ◽  
Frictional Heat ◽  
Dry Machining ◽  
Heat Partition

Thermal Effects Due to Surface Films in Sliding Contact

1994 ◽  
Vol 116 (2) ◽  
pp. 238-245 ◽  
Author(s):  
Brian Vick ◽  
L. P. Golan ◽  
M. J. Furey
Keyword(s):  
Thermal Properties ◽  
Temperature Rise ◽  
Thermal Effects ◽  
Three Dimensional ◽  
Sliding Contact ◽  
Frictional Heat ◽  
Solution Technique ◽  
Surface Films ◽  
Thermal Coupling ◽  
Efficient Manner

The present work examines theoretically the influence of surface coatings on the temperatures produced by friction due to sliding contact. A generalized thermal model is developed which incorporates three-dimensional, transient heat transfer between layered media with thermal coupling at multiple, interacting contact patches. A solution technique based on a variation of the boundary element method is developed and utilized. The method allows for the solution of the distribution of frictional heat and the resulting temperature rise in an accurate yet numerically efficient manner. Results are presented showing the influence of film thickness, thermal properties, velocity, and contact area on the division of heat and surface temperature rise. The results show that a film with thermal properties different than those of the substrate can have a pronounced effect on the predicted temperature rise.

Maximum and Average Flash Temperatures in Sliding Contacts

1994 ◽  
Vol 116 (1) ◽  
pp. 167-174 ◽  
Author(s):  
Xuefeng Tian ◽  
Francis E. Kennedy
Keyword(s):  
Temperature Rise ◽  
Entire Range ◽  
Function Method ◽  
Approximate Solutions ◽  
Sliding Contact ◽  
Heat Sources ◽  
Flash Temperature ◽  
Infinite Body ◽  
Average Surface ◽  
Heat Partition

The surface temperature rise for a semi-infinite body due to different moving heat sources is analyzed for the entire range of Peclet number using a Green’s function method. Analytical and approximate solutions of maximum and average surface temperatures are obtained for the cases of square uniform, circular uniform, and parabolic heat sources. Considering the heat partition between the two contacting bodies, solutions of interface flash temperature are presented for the general sliding contact case as well as for the case of sliding contact between two moving asperities.

Identification of a Friction Model at the Tool-Chip-Workpiece Interface in Dry Machining of a AISI 1045 Steel With a TiN Coated Carbide Tool

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Hamdi Ben Abdelali ◽  
Cedric Courbon ◽  
Joël Rech ◽  
Wacef Ben Salem ◽  
Abdelwaheb Dogui ◽  
...  
Keyword(s):  
Friction Model ◽  
Carbide Tool ◽  
Dry Machining ◽  
Sliding Velocity ◽  
Partition Model ◽  
Heat Partition ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Coated Carbide

The characterization of frictional phenomena at the tool-chip-workpiece interface in metal cutting remains a challenge. This paper aims at identifying a friction model and a heat partition model at this interface during the dry cutting of an AISI1045 steel with TiN coated carbide tools. A new tribometer, based on a modified pin-on-ring system, has been used in order to reach relevant values of pressures, temperatures, and sliding velocities. Additionally a 3D Arbitrary Lagrangian Eulerian model (A.L.E.) numerical model simulating the frictional test has been developed in order to extract local parameters around the spherical pin, such as average contact pressure, average local sliding velocity, and average contact temperature, from experimental macroscopic measurements. A large range of sliding velocities [0.083–5 m/s] has been investigated. It has been shown that friction coefficient and heat partition coefficient are mainly dependant on local sliding velocity at the interface. Three friction regimes have been identified. These experimental and numerical results provide a better understanding of the tribological phenomena along the tool-chip-workpiece interfaces in dry machining of an AISI 1045 steel with a TiN coated carbide tool. Finally a new friction model and heat partition model has been developed for implementation in a numerical cutting model.

Numerical modelling of crack path in the lubricated rolling–sliding contact problems

2008 ◽  
Vol 75 (3-4) ◽  
pp. 880-891 ◽  
Author(s):  
S. Glodež ◽  
R. Potočnik ◽  
J. Flašker ◽  
B. Zafošnik
Keyword(s):  
Numerical Modelling ◽  
Crack Path ◽  
Contact Problems ◽  
Sliding Contact

scholarly journals Prediction Model of the Fusion Microzone on Sliding Contact Surface

2011 ◽  
Vol 2011 ◽  
pp. 1-6
Author(s):  
Yan Lu ◽  
Zuomin Liu
Keyword(s):  
Prediction Model ◽  
Temperature Rise ◽  
Function Method ◽  
Grid Method ◽  
Sliding Contact ◽  
Current Paper ◽  
Frictional Heat ◽  
Sliding Velocity ◽  
Key Points ◽  
Main Factor

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.

Effect of Intermittent Contact on the Stability of Thermoelastic Sliding Contact

1996 ◽  
Vol 118 (1) ◽  
pp. 102-108 ◽  
Author(s):  
Jose R. Ruiz Ayala ◽  
Kwangjin Lee ◽  
Mujibur Rahman ◽  
J. R. Barber
Keyword(s):  
Critical Speed ◽  
Sliding Contact ◽  
Frictional Heat ◽  
Rigid Surface ◽  
Fourier Number ◽  
Sliding Surfaces ◽  
Intermittent Contact ◽  
Thin Walled ◽  
The Stability ◽  
Walled Cylinder

In many sliding systems, the sliding surfaces are not coextensive, so that points on one surface experience alternating periods of contact and separation. This intermittent process can be expected to influence the sliding speed at which the system is susceptible to frictionally-induced thermoelastic instability (TEI). This question is explored in the context of a simple system consisting of a rotating thin-walled cylinder whose end face slides against a rigid surface. The results show that at low Fourier number—i.e., when the frequency of the process is high compared with the thermal transient of the system—only the time-averaged frictional heat input is important and the critical speed is an inverse linear function of the proportion of time in sliding contact. At higher Fourier number, lower critical speeds are obtained, but the dependence on Fourier number is relatively weak.

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