ERTFEM

Application package ERTFEM Is designed to solve learning and research problems in the field of mechanics of deformable solids and field theory using the finite element method (FEM). ERTFEM allows you to get acquainted with the methodology of applying FEM to solve these problems, to conduct research using a certain predefined set of finite element models. ERTFEM can be useful for students and graduate students engaged in mathematical modeling of technological processes. The basis of the proposed software is the mathematical apparatus of the finite element method (FEM). The ERTFEM package is a A set of specific small technological tasks , Using the common core of the finite element method, which includes the following algorithms realized in a plane and axisymmetric setting: - an elastic problem with the calculation of displacements, stresses and deformations; - elastic-plastic problem in small deformations; - temperature stationary problem; Temperature non-stationary problem. Using these algorithms, the system solves various technological problems. The following types of finite elements are implemented: - linear triangle; - a quadratic triangle; - cubic triangle. The current version of the ERTFEM package includes the following Finite element models : - study of elastic-plastic deformations in the workpiece during pressing; - model of the sleeve during assembly; - stationary temperature problem (test); - non-stationary temperature problem (test); - Lame's problem (test); - an arbitrary two-connected region under the influence of internal and external pressure; - mesoproducts of cermets under the action of quasi-static loads and non-stationary thermal fields. The advantages of this system include: - low cost; - relatively low consumed machine resources; - The concept of constructing a system, in which the user does not need to know the details of the FEM for the result.