Using ABAQUS software, the temperature field in the process of sliding friction of the dual steel plate of a new friction plate-conical friction plate was simulated and analyzed by the method of thermo-mechanical coupling. The distribution of heat flux density and the convective heat transfer on different surfaces of the dual steel were considered in the calculation. It is found that the highest temperature of the dual steel during sliding is inside the tapered groove. The temperature inside and outside of the tapered groove is distributed in a low-high-low state, that is, the temperature at the bottom of the tapered groove and the top of the groove is higher than the middle position The temperature gradient of the radial node gradually becomes larger with the passage of time; the temperature distribution of the entire dual steel plate shows a symmetrical trend.
Currently, the ceramic inner container draws great attention in the field of induction heating pot. Based on the traditional roll-forming process for ceramic pot, a new kind process was proposed to fabricate ceramic inner container and synchronously embed stainless steel plate by one-step high temperature sintering. The key technology for this process is to avoid the oxidation of SUS430 stainless steel plate during the high temperature sintering for a longtime by coating a glass-ceramic layer. In this research, the glass-ceramic coating with excellent high temperature oxidation resistance was optimized. The influences of ZrO2 content in the coating slurry on the high temperature oxidation resistance and thermal shock resistance of SUS430 stainless steel plate with glass-ceramic coating were studied. Meanwhile, the coatings were characterized by Scanning Electron Microscopy, X-ray Diffraction and Thermal Expansion Analysis. The experimental results showed that the glass-ceramic coating was smooth and had excellent thermal shock resistance when the addition of ZrO2 reached 15wt%. The mass gain of the SUS430 stainless steel plate with glass-ceramic coating was only 0.453% after sintering at 1300°C for 10h in air atmosphere, which was less one percent than that of SUS430 stainless steel plate under the same sintering condition.
Abstract. This paper analyses the influence of the billiard plate stiffness by heat from the billiard plate dynamics equations and the brake temperature field distribution. Put forward the additional stiffness matrix calculation method through analysing the influence of elastic modulus by temperature and the influence of stiffness by thermal stress. Obtain the thermal vibration analysis results of billiard plate structure, under the influence of temperature and the pre-stressed. Calculation has been completed through the finite element and numerical iterative. This paper provides a meaningful reference for brake design.
Three iron-based powder metallurgy friction materials with different Cu content were prepared by powder metallurgy. The friction and wear properties of the materials were evaluated by the MM3000 friction and wear tester, and the effect of Cu content on the friction coefficient, wear rate and surface morphology was studied. The results show that with the increase of copper content, the matrix components are alloyed at high temperature, and the hardness and strength are significantly improved. The coefficient of dynamic friction and wear rate decreased significantly, and the coefficient of static friction and friction stability increased at high temperature. When the copper content is low, abrasive wear, spalling wear and fatigue wear are the main causes, while when the copper content is high, only slight abrasive wear occurs.
This article mainly aims at the study of dry disc brake friction pair thermal-mechanical coupling. Through the calculation of heat source model, the mechanism of produce heat and friction heat production are obtained. Through the study of rough surface contact theory, the contact thermal resistance model of contact surface is established. The distribution of braking energy in two planes is calculated by working condition of tracked vehicle. An abaqus finite element analysis model is established under the influence of rough surface contact thermal resistance on friction pair. It is compared with the traditional finite element simulation. The second heat source heat distribution is considered in new model. The more accurate calculation results can be obtained by consideration of surface thermal resistance effect in thermal-mechanical coupling simulation. In this way, the temperature distribution of the riveted friction pair is obtained. The accuracy of the finite element model is verified by the brake bench test, which provides a meaningful reference for the design of the heat resistance of the brake.
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