Analyses using finite element methods are now practically already permanent in most development-oriented company. The development of commercial tools for analysis by finite element method (FEM) has become to the stage where the use is quick and relatively easy. In order to transfer knowledge in the field of FEM on the company development department, the procedure of the stress-strain analysis of the stator wheel of electric motors is presented. The process includes the preparation of a geometric model, the importation into software environment for FEM analysis, determination of the type of analysis and material properties, defining contact problems, meshing, setting up boundary conditions and display and evaluation of results.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 13108507Development and application of constitutive models for description of cyclic plasticity of a material usually requires experimental observation of material behaviour for the purpose of which uniaxially loaded test samples are often applied. Experimental observation is usually performed on purpose-built test stands, whereby strains are measured by means of clip-on extensometers or other similar measurement equipment. The material which is under observation at the level of a representative volume (within the measurement area) is presumably homogenous as well as its response, which applies to the elastic, elasto-plastic and viscoelastic area. It is evident that the aforementioned approach to plastic strain observation is not quite appropriate for materials exhibiting the yield-point phenomenon and consequently non-homogenous plastic strain within the stress (Lüders) plateau area. This paper presents the problems of the aforementioned issue based on experimental observation and numerical simulations. Despite the fact that the stress plateau is visible only at first transition of the yield point, it is evident that the yield-point phenomenon in uniaxial tests has a more significant impact than expected.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 12698907