Analysis of Temperature Field on Combining Friction Discs of Wet Clutch

2014 ◽  
Vol 551 ◽  
pp. 399-406
Author(s):  
Jie Li ◽  
Xiao Yan Wang ◽  
Qi Jin ◽  
Jun Zhi Luo ◽  
Liang Hai Yi
Keyword(s):  
Temperature Field ◽  
Sliding Friction ◽  
Axial Direction ◽  
Element Model ◽  
Flow Density ◽  
Heat Flow Density ◽  
Wet Clutch ◽  
Exchange Function ◽  
The Finite Element Model ◽  
Heat Field

Because of overheat and over wear, the distortion and invalidation will be produced easily in combining friction discs of wet clutch of heavy vehicle transmission system. So the paper studies the sliding friction force of a pair of steel and friction disc, calculates the heat flow density, obtains the heat exchange function with axial symmetry, and establishes the finite element model of temperature field. And then the transient heat field simulation is analyzed, and temperature field distribution curves of combining pairs are obtained. Thus the connection is found between time and temperature along radial and axial direction, and temperature field characteristics are obtained with touch press, relative speed, and sliding time.

Thermal Characteristics Analysis and Engineering Application of Machining Center Ram Based on ABAQUS

2013 ◽  
Vol 694-697 ◽  
pp. 762-766 ◽  
Author(s):  
Pan Luo ◽  
Zhong Ping Hua ◽  
Shui Sheng Chen ◽  
Chen Dai
Keyword(s):  
Temperature Field ◽  
Thermal Deformation ◽  
Engineering Application ◽  
Thermal Characteristics ◽  
Thermal Error ◽  
Axial Direction ◽  
Element Model ◽  
Machining Center ◽  
Characteristics Analysis ◽  
The Finite Element Model

This paper establishes the finite element model of XK2535 gantry machining center ram structure, and considers the influence of bearing to the slippery pillow in the axial direction to analyzes the rams temperature field and thermal deformation based on ABAQUS. Finally using SINUMERIK 840D is to compensating thermal error of the ram.

A Finite Element Analysis Study of Non-Linear Behavior in a Bolted Connection

1999 ◽  
Author(s):  
Richard B. Englund ◽  
David H. Johnson ◽  
Shannon K. Sweeney
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sliding Friction ◽  
Element Model ◽  
Element Analysis ◽  
Bolted Connection ◽  
Fea Model ◽  
Linear Behavior ◽  
Radial Loading ◽  
The Finite Element Model

Abstract A finite element analysis (FEA) model of the interaction of a nut and bolt was used to investigate the effects of sliding, friction, and yielding in a bolted connection. The finite element model was developed as a two-dimensional, axisymmetric system, which allowed the study of axial and radial loading and displacements. This model did not permit evaluation of hoop or torsional effects such as tightening or the helical thread form. Results presented in this paper include the distribution of load between consecutive threads, the relative sliding along thread faces, and the stress distribution and regions of yielding in the model. Finally, a comparison to previous, linear analysis work and to published experimental data is made to conclude the paper.

Analysis of the Temperature Field of the Diamond Wheel Dressed Using Laser Assisted Ultrasonic-Vibration Combined Dressing Method

2016 ◽  
Vol 874 ◽  
pp. 261-267 ◽  
Author(s):  
Zhi Bo Yang ◽  
Zhen Zhang ◽  
Rui Yun Yang ◽  
Ai Ju Liu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Model ◽  
Ultrasonic Vibration ◽  
Working Conditions ◽  
Element Model ◽  
Diamond Wheel ◽  
Dressing Method ◽  
Infrared Temperature Measurement ◽  
The Finite Element Model

During the dressing process of diamond wheel using laser/ultrasonic-vibration combined dressing method, the removal mode of the local materials on the surface of wheel with the use of laser’s heating effect transits from brittle fracture to plastic flow, so that the wear of diamond dresser can be reduced and the dressing efficiency and surface dressing quality can be improved. Using ANSYS analysis software, the three-dimensional units were used and the nonlinearity of the material’s thermophysical properties was taken into account, and thereby, the finite element model of the temperature field of the diamond wheel heated by the laser during the dressing process was constructed. Then, the distributions of the temperature field on the surface and section of the wheel under different technological parameter were acquired. Moreover, the temperature distribution of the dressed wheel under actual working conditions was measured using infrared temperature measurement method. The results indicate that, under the same working conditions, the simulation results using finite element model fit well with the measured values, i.e., the finite element model has important guiding significance to the selection of technological parameters in dressing.

Thermal Response Analysis and FE Modeling of Weapon

2012 ◽  
Vol 503-504 ◽  
pp. 11-14
Author(s):  
Yan Jun Zhao ◽  
Xin Jun Li ◽  
Yong Hai Wu ◽  
Cheng Xu
Keyword(s):  
Thermal Analysis ◽  
Finite Element ◽  
Temperature Field ◽  
Research Work ◽  
Thermal Response ◽  
Element Model ◽  
Response Analysis ◽  
Fe Modeling ◽  
Effects Of Temperature ◽  
The Finite Element Model

Thermal is a important factor that affect weapon firing accuracy and security in the process of weapon fire, so thermal analysis of weapon has important meaning . Aim at researched Weapon, the finite element model of the gun body was built, the temperature field of the gun body was calculated by FEM. The effects of temperature of the gun body on firer and aiming mechanism were also studied. Current research work will be helpful the weapon design

scholarly journals Thermal conditions for geothermal energy exploitation in the Transcarpathian depression and surrounding units

2016 ◽  
Vol 46 (1) ◽  
pp. 33-49 ◽  
Author(s):  
Dušan Majcin ◽  
Roman Kutas ◽  
Dušan Bilčík ◽  
Vladimír Bezák ◽  
Ignat Korchagin
Keyword(s):  
Temperature Field ◽  
Heat Flow ◽  
Field Distribution ◽  
Geothermal Energy ◽  
Thermal Conditions ◽  
Flow Density ◽  
Heat Flow Density ◽  
Temperature Field Distribution ◽  
Energy Exploitation

Abstract The contribution presents the results acquired both by direct cognitive geothermic methods and by modelling approaches of the lithosphere thermal state in the region of the Transcarpathian depression and surrounding units. The activities were aimed at the determination of the temperature field distribution and heat flow density distribution in the upper parts of the Earth’s crust within the studied area. Primary new terrestrial heat flow density map was constructed from values determined for boreholes, from their interpretations and from newest outcomes of geothermal modelling methods based on steady-state and transient approaches, and also from other recently gained geophysical and geological knowledge. Thereafter we constructed the maps of temperature field distribution for selected depth levels of up to 5000 m below the surface. For the construction we have used measured borehole temperature data, the interpolation and extrapolation methods, and the modelling results of the refraction effects and of the influences of source type anomalies. New maps and other geothermic data served for the determination of depths with rock temperatures suitable for energy utilization namely production of electric energy minimally by the binary cycles. Consequently the thermal conditions were used to identify the most perspective areas for geothermal energy exploitation in the region under study.

scholarly journals Theoretical investigation of high-speed heating process in surface layer of grey iron

2016 ◽  
Vol 1 (6) ◽  
pp. 3-7
Author(s):  
Юлия Семенова ◽  
Yuliya Semyonova ◽  
Андрей Рахимянов ◽  
Andrey Rakhimyanov ◽  
Юрий Никитин ◽  
...  
Keyword(s):  
Surface Layer ◽  
Temperature Field ◽  
Heat Flow ◽  
Heat Source ◽  
High Speed ◽  
Phase Changes ◽  
Maximum Temperature ◽  
Flow Density ◽  
Heat Flow Density ◽  
Grey Iron

In the paper there is shown the topicality of theoretical researches of processes arising in a surface layer of materials at combined machining methods. The peculiarities of thermal processes development in a surface layer of grey iron at high speed heating are considered. On the basis of the solution of a thermal conductivity differential equation the influence of heat source parameters (heat flow density, coefficient of concentration and movement speed) upon characteristics of a temperature field in a surface layer of material worked. The quantitative correlations of dimensions of an area of phase changes in a surface layer at a constant value of heat flow density and at the ensuring of constancy of maximum temperature value on the surface worked are determined. The characteristics correlation of a temperature field at the change of a coefficient of concentration and flow density of a heat source is revealed.

Analysis of influencing factors on transient temperature field of wet clutch friction plate used in marine gearbox

2018 ◽  
Vol 70 (2) ◽  
pp. 241-249 ◽  
Author(s):  
Tengjiao Lin ◽  
Zi-ran Tan ◽  
Ze-yin He ◽  
Hong Cao ◽  
He-sheng Lv
Keyword(s):  
Temperature Field ◽  
Friction Coefficient ◽  
Sliding Friction ◽  
Moment Of Inertia ◽  
Transient Temperature ◽  
Content Type ◽  
Transient Temperature Field ◽  
Wet Clutch ◽  
Sliding Friction Coefficient ◽  
Friction Plate

Purpose This paper aims to introduce the moment of inertia of the driving and driven end of the clutch into the analysis of the transient temperature field of a friction plate and studied the influencing factors on that, especially to a marine gearbox. Design/methodology/approach A three-dimensional transient heat transfer analysis model of a wet clutch friction plate used in a marine gearbox is developed, and the transient characteristics of the temperature field during engagement are analyzed with taking account of the influence factors such as the sliding friction coefficient, engaging revolving speed, moment of inertia and applied engagement pressure. Findings The paper found out that the hot spot appears on the surface of the friction plate, taking account of the effect of radial slots and spiral groove. To avoid damage to the friction plate as a result of overheating, the appropriate sliding friction coefficient, lower engaging revolving speed and reasonable selection of applied engagement pressure curve can ensure a favorable heating situation of the friction plate. The reasonable structural design for the clutch with a bigger moment of inertia of driving end and smaller moment of inertia of driven end can reduce the engaging time effectively and decrease the peak temperature of the friction plate. Originality/value This paper fulfils a method to study the transient temperature field of a wet clutch friction plate, especially used in a marine gearbox.

The Effects of the Cooling Gallery Position on the Piston Temperature Field and Thermal Stress

2010 ◽  
Vol 37-38 ◽  
pp. 1462-1465 ◽  
Author(s):  
Jin Xiang Liu ◽  
Yue Wang ◽  
Wei Zheng Zhang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Stress ◽  
Radial Direction ◽  
Axial Direction ◽  
Element Model ◽  
Finite Element Analyses ◽  
Ring Groove ◽  
Engine Piston ◽  
Thermal Stress Concentration

The effects of cooling gallery position on the piston temperature field and thermal stress are studied. A finite element model of 1015 engine piston is developed using Pro/E software and finite element analyses are achieved through ANSYS code. Numerical simulations are performed to find the temperature and thermal stress change rules with regard to the cooling gallery position. The results demonstrate that the axial direction position of cooling gallery has obvious effects on the piston temperature while the radial direction position of cooling gallery affects the piston thermal stress a lot. The highest position of cooling gallery should be as the same line as the top of the first ring groove. The distance between cooling gallery and piston radial edge should be more than a certain value to decrease the temperature gradient and thermal stress concentration.

scholarly journals Sliding State Analysis of Fractal Rough Interface Based on the Finite Element Method

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2121
Author(s):  
Jianpeng Wu ◽  
Liyong Wang ◽  
Le Li ◽  
Yuechao Shu ◽  
Li Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Surface Topography ◽  
Rough Surface ◽  
Sliding Friction ◽  
Friction Pair ◽  
Three Dimensional ◽  
Element Model ◽  
High Temperature Stress ◽  
The Finite Element Model

Local high temperature, stress concentration, and abnormal friction coefficients will appear at the friction pair in a wet clutch as a result of surface topography real-time changing. In order to improve the reliability of clutch friction components and reduce the failure phenomenon, the three-dimensional fractal surface topography data of the actual rough surface asperities are scanned, extracted, and processed successively, and then the finite element model of the rotary sliding friction pair is established considering the micro surface topography. Based on the finite element model, the variation of surface stress and strain is analyzed, and the friction coefficient measured experimentally is taken as the model input. It is concluded that when the rough surface and smooth surface make contact with each other, the maximum stress and plastic strain appear at the inner radius edge. Therefore, this research has a guiding significance for the structural design and processing technology of the friction components in a vehicle clutch.

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