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Mathematical simulation of the behavior of materials with nonlinear mechanical properties under hot deformation

Priority areas of development: mathematics
2015
Department: Laboratory of Simulation Modelling

Goal of research: The development of methods for determining the rheological characteristics of the materials used in the numerical simulation of metal forming processes.

Methodology:

The objects of the research are simulatedusing the methods and techniques of continuum mechanics. The viscoplastic theory was used for a description of metal forming processes as well as the theory of superplastic flow, methods of solving nonlinear boundary problems of continuum mechanics.

Empirical base of research:

The study is based on experimental data obtained by testing samples with planar compressive strain precipitate, stretching and molding into a cylindrical membrane matrix.

Results of research:

Methods of mathematical modeling of superplastic forming blanks in a free gas molding.

Methods of determining the characteristics of superplastic materials on the basis of tests on the free gas molding blanks.

Constitutive data of a number of metal alloys in hot forming conditions, associating the flow stress with forming conditions (strain rate, a strain rate and temperature).

Level of implementation,  recommendations on implementation or outcomes of the implementation of the results:

The results can be recommended for introduction at the enterprises of machine-building and aircraft industries. The developed methodology can be used at the design stage of metal forming technologies including processes like superplastic forming, rolling, forging, stamping, etc.

Publications:


Aksenov S. A., Puzino Y. A., Kliber J., Bober S. A. Processing of plane strain compression test results for investigation of AISI-304 stainless steel constitutive behavior // Journal of Chemical Technology and Metallurgy. 2015. Vol. 50. No. 6. P. 644-650. 
Kotov A. D., Mikhaylovskaya A. V., Kishchik M. S., Tsarkov A. A., Aksenov S. A., Portnoy V. K. Superplasticity of high strength Al based alloys produced by thermomechanical treatment // Materials and Design. 2015. 
Aksenov S. A., Zakhariev I. Y., Osipov S. A., Kolesnikov A. V. Characterization of superplastic materials by results of free bulging tests // Materials Science Forum. 2016. Vol. 838-839. P. 552-556. doi
Aksenov S. A., Kolesnikov A. V., Mikhaylovskaya A. V. Design of a gas forming technology using the material constants obtained by tensile and free bulging testing // Journal of Materials Processing Technology. 2016. Vol. 237. P. 88-95. doi
Churyumov A. Y., Mikhaylovskaya A. V., Bazlov A., Tsarkov A., Kotov A., Aksenov S. A. Influence of Al3Ni crystallisation origin particles on hot deformation behaviour of aluminium based alloys // Philosophical Magazine. 2017. Vol. 97. No. 8. P. 572-590. doi
Aksenov S. A., Zakhariev I. Y., Kolesnikov A. V., Osipov S. A. ..