Application of a software system of finite-element analysis ANSYS for computer modelling of cylindrical products stress state at exposure to local heat sources

Abstract

Developing manufacturing techniques of compound items it is necessary to consider the factors influencing the distribution of welding stresses resulting from local heating source in the considered conjugation interface under consideration and the nature of the changes in it. Using real products in research results in high financial and energy costs as well as possible crashes. Distribution of heat when exposed to a local heating source as well as structural, phase, chemical transformations and other technological factors can be thoroughly studied at simulating materials and processes models. The purpose of this modeling is to develop methodology for calculating the stress-strain state of compound parts structure under the influence of a local heating source using numerical finite element method (FEM). This is accomplished using numerical simulation algorithms, that is the finite element method as the most powerful and functional means of numerical analysis in a wide variety of engineering problems. Classic FEM algorithm is implemented in several steps: sampling the area under consideration, the choice of the variational principle for determining the basic unknown functions, the choice of approximating functions, the implementation of the variational principle, the introduction of boundary conditions, solution of algebraic equations using standard numerical methods. After determining the nodal displacements in accordance with the known theory of elasticity ratios the strain and stress state is calculated. Using finite-element calculations ANSYS system a method that makes it possible to perform with great efficiency modeling the stress-strain state of structural components and to predict the distribution of strains in order to ensure conditions of regulated assembling of compound products