A NUMERICAL METHOD FOR DETERMINING THE DEPENDENCE OF THE THERMALLY STRESSED STATE OF A ROD ON AMBIENT TEMPERATURE WITH THE SIMULTANEOUS PRESENCE OF THERMAL PROCESSES

Abstract

Existing methods for studying the thermally stressed and deformed state of a rod of the limited length from a special heat-resistant alloy do not take into account the simultaneous presence of thermal processes, such as heat exchange, axial force, thermal insulation, local temperature, operating conditions of the rod and the fullscale dependence of the coefficient of thermal expansion of the material of the rod on temperature. To solve such problems, the authors propose a new numerical method for studying the thermomechanical state of a rod of the limited length from the heat-resistant alloy ANV-300. This rod is of a limited length and rigidly clamped at both ends. The lateral surface of sections (0 x L / 3) e (2 L / 3 x L) of the rod is thermally insulated. At the site (L / 3 x 2 L / 3) of the rod, the local temperature is given, which varies in coordinate by a linear law. The studies were carried out at different ambient temperatures. The laws of the distribution field of elastic displacements of the elastic component of deformation are constructed, respectively, according to Hooke's law, the values of the elastic component of stress, taking into account the field dependence between the coefficient of thermal expansion and temperature. As a result of studies, it was found that a change in the temperature of the surrounding cross-sectional area of the left end of the medium has little effect on the thermally stressed state of the considered rod than the effect of the change.