scholarly journals The Effect of Magnetic Field on Fretting Wear under Gross Slip Condition

2011 ◽  
Vol 6 (2) ◽  
pp. 376-386
Author(s):  
Yuki NASU ◽  
Kenkichi SATO
Keyword(s):  
Magnetic Field ◽  
Slip Condition ◽  
Fretting Wear

scholarly journals Effect of Velocity Slip Boundary Condition on the Flow and Heat Transfer of Cu-Water and TiO2-Water Nanofluids in the Presence of a Magnetic Field

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Abdelhalim Ebaid ◽  
Fahd Al Mutairi ◽  
S. M. Khaled
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Fluid Velocity ◽  
Velocity Slip ◽  
Slip Boundary Condition ◽  
Dual Solutions ◽  
Slip Condition ◽  
Shrinking Sheet ◽  
Physical Parameters ◽  
Flow And Heat Transfer

In nanofluid mechanics, it has been proven recently that the no slip condition at the boundary is no longer valid which is the reason that we consider the effect of such slip condition on the flow and heat transfer of two types of nanofluids. The present paper considers the effect of the velocity slip condition on the flow and heat transfer of the Cu-water and the TiO2-water nanofluids over stretching/shrinking sheets in the presence of a magnetic field. The exact expression for the fluid velocity is obtained in terms of the exponential function, while an effective analytical procedure is suggested and successfully applied to obtain the exact temperature in terms of the generalized incomplete gamma function. It is found in this paper that the Cu-water nanofluid is slower than the TiO2-water nanofluid for both cases of the stretching/shrinking sheets. However, the temperature of the Cu-water nanofluid is always higher than the temperature of the TiO2-water nanofluid. In the case of shrinking sheet the dual solutions have been obtained at particular values of the physical parameters. In addition, the effect of various physical parameters on such dual solutions is discussed through the graphs.

Finite element analysis of fretting wear considering variable coefficient of friction

2018 ◽  
Vol 233 (5) ◽  
pp. 758-768 ◽  
Author(s):  
Ling Li ◽  
Le Kang ◽  
Shiyun Ma ◽  
Zhiqiang Li ◽  
Xiaoguang Ruan ◽  
...  
Keyword(s):  
Finite Element ◽  
Coefficient Of Friction ◽  
Variable Coefficient ◽  
Friction Model ◽  
Slip Condition ◽  
Fretting Wear ◽  
Partial Slip ◽  
Wear Volume ◽  
The Coefficient Of Friction ◽  
Contact Surfaces

Fretting wear is a kind of material damage in contact surfaces caused by microrelative displacement between two bodies. It can change the profile of contact surfaces, resulting in loosening of fasteners or fatigue cracks. Finite element method is an effective method to simulate the evolution of fretting wear process. In most studies of fretting wear, the coefficient of friction was assumed to be constant to simplify model and reduce the difficulty of solving. However, fretting wear test showed that the coefficient of friction was a variable related to the number of fretting cycles. Therefore, this paper introduces the coefficient of friction as a function of the number of fretting cycles in numerical simulation. A wear model considering variable coefficient of friction is established by combining energy consumption model and adaptive grid technique. The nodes of contact surfaces are updated through the UMESHMOTION subroutine. The effects of constant coefficient of friction and variable coefficient of friction on fretting wear are analyzed by comparing the wear amount under different loading conditions. The results show that when compared with coefficient of friction model, fretting wear is obviously affected by variable coefficient of friction and the variable coefficient of friction model has a larger wear volume when the fretting is in partial slip condition and mixed slip condition. In gross slip condition, the difference of wear volume between variable coefficient of friction model and coefficient of friction model decreases with the increase in the displacement amplitudes.

Unsteady squeezed Casson nanofluid flow by considering the slip condition and time‐dependent magnetic field

Heat Transfer ◽  
2020 ◽  
Vol 49 (8) ◽  
pp. 4907-4922
Author(s):  
Manjappa Archana ◽  
Mundalamane Manjappa Praveena ◽  
Kondlahalli Ganesh Kumar ◽  
Sabir Ali Shehzad ◽  
Manzoor Ahmad
Keyword(s):  
Magnetic Field ◽  
Slip Condition ◽  
Time Dependent ◽  
Nanofluid Flow ◽  
Casson Nanofluid

Effects of Magnetic Field on Fretting Wear (Part III)

2000 ◽  
Vol 2000.1 (0) ◽  
pp. 539-540
Author(s):  
Kenkichi SATO ◽  
Jun HOMIZU ◽  
Hiroyuki FUJIMOTO ◽  
Yukio SATO
Keyword(s):  
Magnetic Field ◽  
Fretting Wear

Investigation on the Interaction between Plasticity Response and Fretting Wear under Partial Slip Condition

2014 ◽  
Vol 699 ◽  
pp. 378-383
Author(s):  
M.A. Harimon ◽  
Abdul Latif Mohd Tobi ◽  
Abdullah Aziz Saad ◽  
M.N. Che Seman
Keyword(s):  
Plastic Strain ◽  
Wear Behavior ◽  
Surface Profile ◽  
Slip Condition ◽  
Fretting Wear ◽  
Cyclic Plasticity ◽  
Partial Slip ◽  
Number Of Cycles ◽  
Relationship Of ◽  
Worn Surface

The fretting wear behavior of Ti-6Al-4V is studied with the focus on cyclic plasticity effect under partial slip condition. The analysis is simulated using finite element based method with a new worn surface profile model represent a given number of cycles using a cylinder-on-flat geometry. The effect of surface modification on the stresses and plastic strain distribution is studied. As the profiles become deeper and wider, the contact pressure and shear stress increase at the stick zone. Due to this increment, the accumulation of plastic strain will become more significant. This may lead to material’s ductility exhaustion that could initiate the nucleation of crack. Plastic deformation is predicted to occur in the 6000th cycle model and onwards. Overall the relationship of fretting wear and plasticity has been defined qualitatively.

scholarly journals Significance of Thermophoretic and Brownian Motion on MHD Nanofluids Flow towards a Circular Cylinder under the Inspiration of Multiple Slips: An Industrial Application

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Aaqib Majeed ◽  
Muhammad Zubair ◽  
Adnan Khan ◽  
Taseer Muhammad ◽  
M.S. Alqarni
Keyword(s):  
Magnetic Field ◽  
Brownian Motion ◽  
Thermal Radiation ◽  
Temperature Profile ◽  
Free Stream ◽  
Variable Magnetic Field ◽  
Slip Condition ◽  
Stream Velocity ◽  
Nonlinear Thermal Radiation ◽  
The Impact

In this article, MHD flow of silver/water nanofluid past a stretched cylinder under the impact of thermal radiation with chemical reaction and slip condition is studied. The impact of Soret and Dufour effect is also analyzed during this flow. The uniqueness of the given problem is enlarged with the insertion of variable magnetic field, free stream velocity, thermal slip condition, and nonlinear thermal radiation. The PDEs are converted to ODEs by using suitable similarity transformation. The nonlinear system of ODEs is solved by applying convergent homotopy analysis method (HAM). The velocity, temperature, and concentration profiles for the free stream and at the plate are discussed through graphs and numerical tables. It is found that velocity field reduces, while the temperature profile rises for the increasing values of magnetic parameter. It is examined that effects of curvature on frication factor are increasing. Furthermore, temperature profile increases for greater Brownian motion and thermophoresis parameters. Transfer of heat enhances decreasing the radius of the cylinder also with heat generation parameter. The skin friction can be reduced by enhancing free stream and wall stretching velocities ratio. Velocity profile of the flow can be controlled by enhancing velocity slip and magnetic field.

scholarly journals Fully Developed Flow of Fourth Grade Fluid through the Channel with Slip Condition in the Presence of a Magnetic Field

2016 ◽  
Vol 9 (7) ◽  
pp. 2239-2245 ◽  
Author(s):  
P. Ghasemi Moakher ◽  
Morteza Abbasi ◽  
Mehran Khaki Jamei ◽  
◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fourth Grade ◽  
Slip Condition ◽  
Fully Developed Flow ◽  
Grade Fluid ◽  
Fourth Grade Fluid

Peristalsis in a curved channel with slip condition and radial magnetic field

2015 ◽  
Vol 91 ◽  
pp. 562-569 ◽  
Author(s):  
S.A. Shehzad ◽  
F.M. Abbasi ◽  
T. Hayat ◽  
F. Alsaadi ◽  
G. Mousa
Keyword(s):  
Magnetic Field ◽  
Slip Condition ◽  
Curved Channel ◽  
Radial Magnetic Field
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