Numerical modeling of thermomechanical processes in heat-resistant alloys

Authors

  • B. Kenzhegulov
  • Jaroslav Kultan
  • D.B. Alibiyev
  • A.Sh. Kazhikenova

DOI:

https://doi.org/10.31489/2020ph2/101-107

Keywords:

thermal expansion, modulus of elasticity, rod, elongation, thermal stress state, sampling

Abstract

This article presents a numerical simulation of thermomechanical processes in heat-resistant alloys. The authors develop the law of temperature distribution along the length of the physical body, which is considered as a rod of alloy EI-617. The authors also investigated the dependence of the magnitude of the elongation of the rod from a given temperature. To do this, the rod is conditionally divided into several elements, and then the study is carried out in one area. To determine the temperature dependence, the temperature distribution field is approximated by a full polynomial of the second degree, and approximation spline functions are introduced. Using a temperature gradient for one element, the functional expression characterizing the total thermal energy is written, first for the (n-1) element, then for the last n-th element. The total thermal energy is expressed by the formula mceclip0-2acc83161544243d06ba3b54c2dfbfa1.png . By minimizing the total thermal energy, we obtain a system of algebraic equations for determining the nodal values of temperatures. Applying the obtained values, the elongation of the element due to thermal expansion is calculated. The relationship between the temperature T, elongation  DlT , «tensile» force R , and «tensile stress» . is shown in the work. It is shown that with increasing temperature, the above values proportionally increase.

Additional Files

Published

2020-06-30

Issue

Section

THERMOPHYSICS AND THEORETICAL THERMOENGINEERING

Received

2023-11-21