The braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyz More
The braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyze the dynamic-thermal ceramic brake disc during the braking operation using the finite element method. Currently, the conventional brake disc is used in the Peugeot 206 car (domestic production), which has low efficiency in terms of life, wear, etc. Therefore, in this research, considering the significant production of Peugeot 206 car in the country, the disc and brake pads of this car have been selected, which were first modeled by Catia software, and after transferring the model to Abacus software and defining the types of ceramics and Cast iron was analyzed by finite element method. Compared the results of the Peugeot 206 ceramic brake disc and pad analysis were with the results of the standard (cast iron) discs in this car. The results showed that the maximum von Mises stress in the ceramic disc was 260.7 MPa, while the maximum von Mises stress in the cast iron disc was 293.3 MPa. The amount of heat produced in the ceramic disc during the braking action in 4 seconds was almost 84% less than the cast iron disc in the same period. Also, the results showed that the ceramic disc has a higher safety factor (1.98) than the cast iron disc (1.45).
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The rolling process is actually the shaping of steel, in which rollers are used to change the shape, improve the mechanical properties of the material, and eliminate the uniformity of the metal. Steel can be rolled in two forms, hot and cold, each of which has its chara More
The rolling process is actually the shaping of steel, in which rollers are used to change the shape, improve the mechanical properties of the material, and eliminate the uniformity of the metal. Steel can be rolled in two forms, hot and cold, each of which has its characteristics. The purpose of this research was to investigate the effect of thermal stress during the rolling process on the failure of rollers using finite element simulation. This construction is non-linear and it is hypothesized that the roller is isotropic, without cracks and thermal strain, and the temperature of the environment is similar to the room. In this research, the effect of basic and accurate cooling during the rolling process has also been investigated. The results obtained in six hot rolling are created according to the highest number of rollers and the number of rollers in the rollers, which is shown and the extent of the role of thermal stresses on the failure of the rollers is stated
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Evaluation of soil bearing capacity coefficients of has been the focus of a significant amount of studiesby various researchers. In all conducted studies and analyses, by considering different forms ofearthquake load with pseudo-static performance, different results hav More
Evaluation of soil bearing capacity coefficients of has been the focus of a significant amount of studiesby various researchers. In all conducted studies and analyses, by considering different forms ofearthquake load with pseudo-static performance, different results have been obtained. In this research,evaluation of soil bearing capacity coefficients under earthquake load has been carried out using finiteelements software Plaxis and the obtained results have been compared with those from other publishedstudies. Moreover, the effect of the inertia of the underpinning soil on the soil bearing capacitycoefficients was modeled in the pseudo- static mode and the results indicated that bearing capacitycoefficients obtained from pseudo-static gave good agreement with other methods. However,comparison of these two results revealed that the results obtained from numerical modeling are moreconservative and are on the safety side. Finally, since the pseudo –static load is not characterized as anappropriate alternative for the earthquake load; the effect of underpinning soil on the manner oftransferring the earthquake waves until reaching the foundation bed has been also investigated.Evaluation of soil bearing capacity coefficients of has been the focus of a significant amount of studiesby various researchers. In all conducted studies and analyses, by considering different forms ofearthquake load with pseudo-static performance, different results have been obtained. In this research,evaluation of soil bearing capacity coefficients under earthquake load has been carried out using finiteelements software Plaxis and the obtained results have been compared with those from other publishedstudies.
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