Determination of Thermomechanical Stresses in Elements of Vehicles' Braking Systems

Oleksii Grevtsev,Oksana Shevchuk,Olena Skyba,Viktor Ostroverkhov,Liubomyr Poberezhny,Oleksandr Shashkevych,Liubov Poberezhna,Pavlo Popovych,Ninel Selivanova,Yurii Rudyak

doi:10.26552/com.c.2022.1.b1-b8

Abstract

The main objective of the study was to develop a model and analyze the thermomechanical behavior of the hub material of the vehicle brake disk. The simulation strategy was based on the solution of the three-dimensional problem of the theory of elasticity for the case of effect of external loads and temperature fields on the metal structure element of the vehicle brakes. To solve this type of task of the theory of elasticity, the differential equations of the second order were used for the first time. Adaptation of the proposed model, completed in the article, has proved the correctness of use of these equations in modeling the thermomechanical processes with determination of stresses and displacements in unevenly heated rotary cylinders of the final length. The proposed method can be applied with high efficiency in stress strain state simulation of individual parts of vehicles.

Highlights

Frictional heat generation induces temperature gradients and thermal stresses in the contacting components of a brake
It is advisable to improve the theoretical foundations for the better understanding of thermomechanical processes in rotating bodies, in particular cylindrical elements of metal structures of vehicles that are under the simultaneous action of thermal and mechanical stresses
The exact solution and the method for determining the stresses allow to conduct a correct analysis of the thermomechanical behavior of the material of the brake disk hub of the vehicle

Summary

Introduction

Frictional heat generation induces temperature gradients and thermal stresses in the contacting components of a brake. The complexity of a problem, incorporating a number of different phenomena, requires consideration at different scales. Among these scales, there are bulk, macro- and micro-levels [1,2,3]. The braking system operates by the two main parts, the stator and the rotor. The rotor and the stator are creating a friction process. The brake system requires maintenance or replacement of components after a certain time. Mechanical braking, supported with engine brakes, produces excellent braking and extends the life of the braking components [4,5]

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