Isı Üretimi Olan Sürtünmeli Temasların Sıcaklık Bağımlı Özellikler Kullanılarak Analizi

Abstract

The aim of this study is to analyze the frictional contacts with heat generation considering temperature dependent thermoelastic material properties. Frictional contacts take place in almost all the applications of the mechanical engineering. Generally, the solutions of contact problems are not so easy and while the contact problem involves more parameters, it becomes more difficult problem to solve. For instance, the frictionless contact problem is the easiest one wheras the contact problem with frictional heat generation is the more difficult one to solve. In this scope, it is considered that the heat generation in the contact region enters the material and changes the thermoelastic material properties. Contact problem is solved by using temperature dependent and constant matarial properties and these solutions are compared and error analysis is done between these solutions. In frictional contacts with heat generation, generated heat in the contact zone must be in equilibrium. In order to solve the problem, finite element analysis is used and an iterative code is created and integtated in ANSYS which is a general purpose finite element analysis software. In this study, the friction coefficient in the contact zone is assumed constant and Coulomb type friction model is taken as a basis. Moreover, punch is assumed rigid, flat and insulated. Results are obtained for homogenous isotropic metal layer and ceramic coated metal substrate. In addition metal substrate with coated , functionally graded material model is also solved to compare the results with other results in the literature. Error analysis is done by using the results of the constant material properties and the temperature dependent material properties. It shows and emphasizes that the usage of temperature dependent properties in this type problems are crucial.