Research On The Plane Reciprocating Sliding Friction Temperature Field Combined With Infrared Temperature Technique And FEA

Friction heat is generated during the work of the friction pairs, and the tribological behavior of the friction pairs will be affected by the temperature field resulted from the friction heat. As a result, the study of the friction temperature field can provide the theoretical basis for the tribological behavior research, design and application of the friction pairs.By using the temperature sensor to measure the temperature field, the complete three-dimensional temperature field of the friction pair can not be obtained. But the accuracy of the reconstruction of friction temperature field with the numerical calculation method can’t be guaranteed. In order to overcome the limitation of a single method, the way of combining experiment and numerical simulation is adopted for the study of planar reciprocating sliding friction temperature field. The experiment is carried out relying on multifunctional friction wear tester. The load, rotational speed and real-time friction coefficient are obtained by the experiments, and the heat flux density with the temporal-spatial variation is calculated. The temperature field of lower sample is realized by using heat flux density as moving heat boundary condition. In the end, the reliability of the reconstructed temperature field is verified and analyzed with temperature measured by infrared thermal imager and thermocouple.The results of experiments and numerical simulations show that:(1) The method of reconstructing the 3D temperature field by introducing the friction coefficient into the finite element model is feasible. (2) Due to the accumulation and transmission of heat, eventually the temperature field of the friction pairs will present the trend that the temperature gradually decreases with the increase of distance from the contact area. (3) The main factors that affect the evolution and distribution of the friction temperature field are the thermal physical parameters, the rotational speed, the load and the real-time friction coefficient. (4) Comparing the final temperature rise with the average friction coefficient is feasible under the condition of the equal product of load and rotational speed. (5) With the change of rotational speed and load, the absolute error and the average relative error of the experiments and simulations appear regular changes, which provides the theoretical support for correction and analysis of temperature field.