Numerical simulation of dynamic channel-angular pressing of titanium specimens

A. S. Bodrov   ; N. V. Olimpieva   ; A. S. Zelepugin   ; S. A. Zelepugin

Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika, no. 5 (2015), pp. 56-63

Résumé

At present, volume nanostructural and ultrafine-grained materials are considered as promising constructional and functional materials of new generation. Investigation of ultrafine-grained metals received by severe plastic deformation methods showed that they are characterized by a number of unique properties as compared to coarse-grained analogues: raised several times strength combined with good plasticity, low- and high-temperature superplasticity, cyclic and radiating resistance. Recently, a new method of severe plastic deformation was proposed — dynamic channel-angular pressing (DCAP), in which pressing of a specimen through channels is carried out by pulse loading at the expense of energy of compressed gases. In this work, deformation of a titanium specimen during DCAP was numerically investigated in a 3D statement for the dynamic scheme of loading. Computations have been carried out by the finite element method within the framework of the elastic-plastic medium model with allowance for fracture. The effective values of initial velocity and loading pressure are determined for a titanium specimen.

Détail

Keywords: dynamic channel-angular pressing, severe plastic deformation, numerical simulation.

Bibliographie

[1] Valiev R. Z., Islamgaliev R. K., Alexandrov I. V., “Bulk nanostructured materials from severe plastic deformation”, Progress in Materials Science, 45:2 (2000), 103–189 | DOI

[2] Valiev R., “Nanostructuring of metals by severe plastic deformation for advanced properties”, Nature Materials, 3:8 (2004), 511–516 | DOI

[3] Shorokhov E. V., Zhgilev I. N., Khomskaya I. V. i dr., “Vysokoskorostnoe deformirovanie metallicheskikh materialov metodom kanal'no-uglovogo pressovaniya dlya polucheniya ul'tramelkozernistoy struktury”, Deformatsiya i razrushenie materialov, 2009, no. 2, 36–40 (in Russian)

[4] Zeldovich V. I., Shorokhov E. V., Frolova N. Y. et al., “Structure of titanium after dynamic channel angular pressing at elevated temperatures”, The Physics of Metals and Metallography, 108:4 (2009), 347–352 | DOI

[5] Zeldovich V. I., Shorokhov E. V., Dobatkin S. V. et al., “Structure and mechanical properties of titanium subjected to high-rate channel angular pressing and deformation by rolling”, The Physics of Metals and Metallography, 111:4 (2011), 421–429 | DOI

[6] Shipachev A. N., Il'ina E. V., Zelepugin S. A., “Deformirovanie titanovykh obraztsov pri dinamicheskom kanal'no-uglovom pressovanii”, Deformatsiya i razrushenie materialov, 2010, no. 4, 20–24 (in Russian)

[7] Suglobova I. K., Il'ina E. V., Shipachev A. N., Zelepugin S. A., “Vybor parametrov nagruzheniya titanovykh obraztsov pri dinamicheskom kanal'no-uglovom pressovanii”, Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, 2011, no. 2(14), 111–116 (in Russian)

[8] Shipachev A. N., Zelepugin A. S., Il'ina E. V., Zelepugin S. A., “Modelirovanie dinamicheskogo kanal'no-uglovogo pressovaniya titanovykh obraztsov po dvukhporshnevoy skheme nagruzheniya”, Deformatsiya i razrushenie materialov, 2012, no. 10, 7–11 (in Russian)

[9] Zelepugin S. A., Zelepugin A. S., Bodrov A. S., Olimpieva N. V., “Trekhmernoe modelirovanie protsessov plasticheskogo deformirovaniya metallicheskikh obraztsov pri dinamicheskom kanal'no-uglovom pressovanii”, Izv. vuzov. Fizika, 56:7/3 (2013), 50–52 (in Russian)

[10] Gorelski V. A., Zelepugin S. A., Smolin A. Yu., “Effect of discretization in calculating three-dimensional problems of high-velocity impact by the finite-element method”, Computational Mathematics and Mathematical Physics, 37:6 (1997), 722–730 | MR | Zbl

[11] Johnson G. R., “Numerical algorithms and material models for high-velocity impact computations”, International Journal of Impact Engineering, 38:6 (2011), 456–472 | DOI

[12] Kanel' G. I., Razorenov S. V., Utkin A. V., Fortov V. E., Udarno-volnovye yavleniya v kondensirovannykh sredakh, Yanus-K, M., 1996 (in Russian)

[13] Gorel'skii V. A., Zelepugin S. A., Sidorov V. N., “Numerical solution of three-dimensional problem of high-speed interaction of a cylinder with a rigid barrier, taking into account thermal effects”, International Applied Mechanics, 30:3 (1994), 193–198 | DOI

[14] Gorel'skiy V. A., Zelepugin S. A., Tolkachev V. F., “Issledovanie probivaniya pregrad pri nesimmetrichnom vysokoskorostnom udare s uchetom razrusheniya i teplovykh effektov”, Izv. AN. MTT, 1994, no. 5, 121–130 (in Russian)

[15] Zelepugin S. A., Zelepugin A. S., “Modeling of the destruction of targets during a high-velocity impact”, Russian Journal of Physical Chemistry B, Focus on Physics, 2:2 (2008), 246–250