Evaluation of the Transient Temperature Distribution of End-Face Sliding Friction Pair Using Infrared Thermometry

2014 ◽  
Vol 613 ◽  
pp. 213-218
Author(s):  
Wei Wei ◽  
Jian Wei Yu ◽  
Tao You ◽  
Xiao Fen Yu ◽  
Yong Hong Wang
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Measurement System ◽  
Sliding Friction ◽  
Friction Pair ◽  
Dynamic Performance ◽  
Constant Load ◽  
Interface Temperature ◽  
Transient Temperature ◽  
Ir Thermography

A real-time temperature measurement system was designed for end-face sliding friction pairs with an infrared (IR) probe and IR thermography installed on it. The approximate temperature of contact surface was measured by the probe while non-contact surface’s temperature distribution was determined with the IR thermography. Two experiments with constant load but varied rotational speeds were carried out, and a preliminary study was made to analyze the variation of temperature in the friction process. Furthermore, the probe data was used as thermal load to calculate the temperature field by the FEM model and the result was verified using IR images. The experimental results showed that the infrared measurement system can detect and record the interface-temperature variation accurately. The probe data showed a good dynamic performance with the variation of friction coefficient. In addition, the calculated temperature field showed good accordance with the IR thermography data.

Study on the transient temperature distribution of new conical friction plate under sliding friction

2021 ◽  
pp. 095440702110696
Author(s):  
Yanzhong Wang ◽  
Peng Liu
Keyword(s):  
Temperature Distribution ◽  
Temperature Gradient ◽  
Temperature Rise ◽  
Friction Surface ◽  
Sliding Friction ◽  
Conical Surface ◽  
Transient Temperature ◽  
Radial Temperature Gradient ◽  
Radial Temperature ◽  
Friction Plate

Conical friction surface is a novel configuration for friction plate in transmission. Numerical FEA models for transient heat transfer and distribution of conically grooved friction plate have been established to investigate the thermal behavior of the conical surface with different configurations. The finite element method is used to obtain the numerical solution, the temperature test data of conical surface are obtained by the friction test rig. In order to study and compare the temperature behavior of conically grooved friction plate, several three-dimensional transient temperature models are established. The heat generated on the friction interface during the continuous sliding process is calculated. Two different pressure conditions were defined to evaluate the influence of different load conditions on temperature rise and the effects of conical configuration parameters on surface temperature distribution are investigated. The results show that the radial temperature gradient on conical friction surface is obvious. The uniform pressure condition could be used when evaluating the temperature rise of conically grooved friction plate. The increase of the cone height could improve the radial temperature gradient of the conically grooved friction plate.

Thermal Engineering Analysis of Rubber Vulcanization and Tread Temperatures During Severe Sliding of a Tire

1999 ◽  
Vol 27 (1) ◽  
pp. 22-47 ◽  
Author(s):  
H. Sakai ◽  
K. Araki
Keyword(s):  
Temperature Distribution ◽  
Chemical Reaction ◽  
Sliding Friction ◽  
Rolling Resistance ◽  
Temperature History ◽  
Thermal Engineering ◽  
Transient Temperature ◽  
Engineering Analysis ◽  
Transient Temperature Distribution ◽  
Heating And Cooling

Abstract Tire skid marks at the scene of an accident are often used as evidence and are a very important phenomenon. However, the mechanism of this complex phenomenon has not yet been fully examined. Tires are manufactured by a chemical reaction in which rubber molecules are combined into a network structure during a process called vulcanization, in which the tire is heated in a mold. The transient temperature distribution is important in determining the state of vulcanization, but the analysis is very difficult. We treat the tire tread as a rubber slab to estimate the temperature history during heating and cooling. Then we calculate the vulcanization index using Arrhenius's equation, assuming that the rate of chemical reaction approximately doubles as the temperature increases by 10° C. Finally, we calculate the transient temperature distribution of the tread due to the heat generated by internal friction (rolling resistance of the tire), and the heat generated by sliding friction under conditions of severe cornering and braking. We investigate a criterion for modeling the occurrence of tire skid marks, assuming that skid marks are caused by exceeding the softening temperatures of the rubber and asphalt.

Estimation of Crater Temperatures Using Infrared Camera

2000 ◽  
Author(s):  
Patrick Kwon
Keyword(s):  
Steady State ◽  
Temperature Distribution ◽  
Heat Conduction Problem ◽  
Infrared Camera ◽  
Video Camera ◽  
Interface Temperature ◽  
Transient Temperature ◽  
Flux Boundary Condition ◽  
Transient Temperature Distribution ◽  
Aisi 1045

Abstract A new technique is developed to estimate the average steady state chip-tool interface temperature during turning. An infrared (IR) video camera attached on the carriage of the lathe measures the transient cooling behavior on the rake surface of an insert after the feed motion is halted. This allows the zero heat flux boundary condition, where the transient Laplace heat conduction problem can be solved numerically to obtain the temporal and spatial temperature distribution. With the experimentally determined transient temperature distribution, the 1-D ellipsoidal model is used to estimate the average steady-state chip-tool interface temperature during machining. The results on turning Gray Cast Iron (GCI) and AISI 1045 steels with various coated and uncoated carbide inserts are presented.

Simulation of Temperature Field of TIG Welding Using FDM

2009 ◽  
Author(s):  
D. H. Tailor ◽  
K. N. Srinivasan ◽  
S. A. Channiwala ◽  
M. Sohel M. Panwala
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Pressure Vessels ◽  
Thin Plates ◽  
Transient Temperature ◽  
Low Carbon ◽  
Butt Welding ◽  
Gtaw Process

Welding is one of the most important material-joining processes widely used in industry. Low carbon steel and stainless steel with thin plates are widely used in the fabrication of pressure vessels and other components. Thin plates are joints together by the Tungsten inert gas welding (GTAW) methods. Temperature distribution that occurs during welding affects the microstructure, mechanical properties and the residual stresses that will be present in the welded material. This paper discusses the development of a model for the temperature distribution during butt welding at different heat inputs using Finite difference method (FDM). The model is created from first principles of heat transfer and utilizes contact conduction that is a function of temperature, Gaussian heat distribution, and many material properties that vary with temperature. The temperature distribution curves obtained with this model are presented. This transient temperature field has been validated with experimentation of measuring temperature during welding of butt welded of low carbon steel using GTAW process. Using this FDM code, the range of error between the model and experimental results is −11.21 to 2.63%, demonstrating the accuracy of the model.

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.

Dynamic Simulation of Temperature Field in Hybrid Laser-GTAW Welding of Galvanized Steels in a Gap-Free Lap Joint Configuration

2009 ◽  
Author(s):  
Shanglu Yang ◽  
Fanrong Kong ◽  
Ehsan Forroozmehr ◽  
Radovan Kovacevic
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
High Speed ◽  
Numerical Results ◽  
Frame Rate ◽  
Welding Parameters ◽  
Transient Temperature ◽  
Lap Joint ◽  
Joint Configuration ◽  
Galvanized Steels

During hybrid laser-arc welding of galvanized dual phase steel 980 in a gap free lap joint configuration, the welding parameters have the significant influences on the weld quality, which is directly related to the temperature distribution of welds. In this paper, a 3D FEM model is used with the application of the double ellipsoidal moving heat source to simulate the transient temperature field and the dimensions of fusion zone and heat affected zone (HAZ) for hybrid laser-arc keyhole welding of galvanized steels in a gap-free lap joint configuration. Temperature-dependent thermophysical properties are used in the simulation. Effects of various welding parameters on the temperature distribution are studied. To validate the numerical results, a high-speed camera with the frame rate of 4000 fps is used to real-time capture the images of the molten pool. The numerical results show a good agreement with the experimental results.

Transient Temperature Distribution and Thermo-Mechanical Coupling Response of Paper in the Fusing Process of Laser Printers

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Pingping Liu ◽  
Huijie Zhang ◽  
Guang Wen ◽  
Fangjun Zuo ◽  
Meiwei Jia
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Boundary Conditions ◽  
Field Analysis ◽  
Laser Printer ◽  
Transient Temperature ◽  
Design Work ◽  
Bending Deformation ◽  
Paper Model ◽  
Transient Temperature Field

Abstract The hot-press fusing process of a laser printer is one of the principal causes for paper folding and bending deformation. In order to predict and control the deformation of paper, first, the following analysis method is proposed for the transient temperature field analysis of the continuous moving paper: discretizing the thermal analysis process, replacing the moving paper model with the moving heat source, and simulating the movement speed of paper by setting the flow boundary conditions. Second, taking the steady-state thermal calculation results of the printer in the standby mode as initial conditions, the temperature distribution characteristics of paper during the movement are obtained with the paper model placed in a whole-machine environment to analyze the transient temperature field. Third, using the method of multi-field coupling, the transient temperature field results of paper are taken as the external load of its static analysis to analyze the deformation of paper during the fusing process; therefore, the quantitative deformation results and deformation characteristics of paper after fusing are obtained. According to the results, more precise boundary conditions can be achieved by calculating the temperature field of paper in a whole-machine environment. The method of transient temperature field analysis for continuous moving objects proposed in this study can effectively simulate the movement process of paper. The results reveal the mechanism of paper wrinkle and bending deformation in the fusing process, which can be used to predict the conveying performance of paper and guide the design work of the printer.

Sign in / Sign up

Export Citation Format

Share Document