THE REVIEW OF MODERN CAE-PROGRAMS AND THE APPROACHED APPROXIMATION TECHNIQUES
OF DIAGRAMS «σ-ε» FOR THE DECISION PROBLEMS OF ELASTIC-PLASTIC DEFORMATION 

Vasil`ev Valeriy Anatol`evich, doctor of technical sciences, professor, head of sub-department of instrument engineering, Penza State Univesity (40 Krasnaya street, Penza, Russia), opto@bk.ru
Samoshin Alexey Vladimirovich, leading engineer designer, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), alexsss13@gmail.com

539.3

10.21685/2307-5538-2017-3-15

Background. For the decision of problems of plastic deformation the analysis of the approached techniques of approximation and construction of diagrammes «σ – ε», using as initial given GOST and TU on materials is carried out Possibilities of modern CAEprograms to solve the given type of problems are considered. The purpose of work is the choice of optimum techniques of approximation and construction of diagrammes «σ – ε», allowing to define the intense-deformed condition of elastic elements and responsible details of sensors with high accuracy and taking into account plastic deformations.
Materials and methods. As methods the method of final elements realised in programs Ansys and SolidWorks was used.
Results. The applied techniques visually prove that in cases of absence of experimental data of tests of samples results of calculations are rather approached, but demand a minimum of the in itial data. Presence of experimental data about mechanical characteristics considerably increases accuracy of calculation that allows to use a sensor potential with maximum efficiency.
Conclusions. The decision of problems of plasticity is actual in designing of products, and, in particular, sensitive elements of sensors made of metals and alloys. In this case even the approached estimation of plastic deformations provides possibility of considerable improvement mass and dimensional design indicators.

CAE-programs, finitte elements method, criterion fon Mises, elasticity, plasticity, diagrammes «σ-ε»