Elastohydrodynamic lubrication study of hard rolling contact using boundary element method

2001 ◽  
Vol 53 (4) ◽  
pp. 148-171 ◽  
Author(s):  
M.H. Onsa ◽  
S.M. Sapuan ◽  
S. Basri ◽  
M.M.H. Megat Ahmad ◽  
M.A. Maleque
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Elastohydrodynamic Lubrication ◽  
Rolling Contact ◽  
Element Method

Analyzing Rolling Pressure of Rolling Strip by Multi-Object Contact Multi-Pole Boundary Element Method

2012 ◽  
Vol 428 ◽  
pp. 14-18
Author(s):  
Xue Dao Shu ◽  
De Yi Liu ◽  
Guang Xian Shen
Keyword(s):  
Boundary Element Method ◽  
Pressure Distribution ◽  
Boundary Element ◽  
Reference Value ◽  
Engineering Problem ◽  
Fortran Program ◽  
Rolling Contact ◽  
Rolling Pressure ◽  
Rolling Strip ◽  
Element Method

For guiding production effectively and revealing rolling mechanisms, the analysis of rolling-pressure distribution regulation is very important. Because rolling strip belongs to multi-object contact engineering problem which involves coupling deformation, obviously the accuracy of disaggregate mathematical method is low. Therefore, in this paper,it is developed that multi-object, elasto-plastic and frictional contact multipole Boundary Element Method (BEM) by Fortran program. It can simulate five object synchronous contact accurately without artificial assumption.The three dimensional rolling-pressure distribution regulation of rolling strip has been obtained through this program. Through testing and calculating the load properties of bearing, the result shows that it is accordant for test and calculation. Therefore, multi-pole BEM is one of the effective numerical analytic tools of rolling contact problem, and the obtained result of rolling-pressure distribution can provide for reference value for analyzing rolling strip.

ANALYSIS OF RING CRACKS IN CERAMIC ROLLING ELEMENTS USING THE BOUNDARY ELEMENT METHOD

Tribologia ◽  
2019 ◽  
Vol 285 (3) ◽  
pp. 51-59
Author(s):  
Waldemar KARASZEWSKI
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Numerical Solutions ◽  
Contact Point ◽  
High Hardness ◽  
Ceramic Materials ◽  
Rolling Contact ◽  
Numerical Calculations ◽  
Three Dimensional Model ◽  
Element Method

Ceramic materials have been increasingly used in bearing systems for over a dozen years. This is due to the specific properties of ceramic materials, such as high hardness, corrosion resistance, the possibility of use in aggressive chemical environments, as well as due to the lower specific weight as compared to steel materials. However, the use of ceramic materials imposes many limitations. The main disadvantages include surface cracks and a low fracture toughness value. The paper presents a numerical analysis of crack propagation in silicon nitride balls. The directions of propagation were analysed for the cracks that are most commonly found on the surface of the commercially available ceramic balls. The directions were analysed along the crack front and considering the location of the crack in relation to the contact point of the balls in the rolling contact. The numerical calculations are based on a three-dimensional model of the ring crack. Numerical calculations were carried out using the boundary element method. Numerical solutions were compared with the results of experimental research.

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