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V. V. Nazarov

APPROXIMATION OF THE CREEP CURVE UP TO THE MOMENT OF NECKING

DOI: 10.17804/2410-9908.2020.3.061-066

In this paper, we propose a model for describing the creep process up to necking. The specified slope of the tangent to the creep curve is used as a criterion for the appearance of necking. The analysis of the calculated data shows that the proposed model is in satisfactory agreement with the experimental creep curves obtained for the VT5 titanium alloy at 600 °C.

Keywords: necking criterion, creep, uniaxial tension

References:

  1. Nazarov V.V. and Lepeshkin A.R. Features of forming and fracture of rectangular plate with a circular hole. News VolgSTU, Problems of Materials Science, Welding and Mechanical strength, 2016, no. 2, pp. 75–78. (In Russian).
  2. Derevyagina L.S., Panin V.E. and Gordienko A.I. Self-organization of plastic shears in localized deformation macrobands in the neck of high-strength polycrystals, its role in material fracture under uniaxial tension. Physical Mesomechanics, 2008, vol. 11, iss. 1–2, pp. 51–62. DOI: 10.1016/j.physme.2008.03.006.
  3. Akhmetzyanov M.Kh., Albaut G.N., and Baryshnikov V.N. Study of Stress Strain State in the Neck of Plane Metallic Specimens in Extension by the Method of Photo-Elastic Coverings. Zavodskaya Laboratoriya. Diagnostika Materialov, 2004, vol. 70 (8), pp. 41–51. (In Russian).
  4. Lokoshchenko A.M. and Teraud V.V. Analysis of the localization of deformation in cylindrical samples by the photographic registration at the high-temperature creep. Deformatsiya i Razrushenie Materialov, 2013, no. 11, pp. 43–46. (In Russian).
  5. Agakhi K.A., Kuznetsov, V.N., Lokoschenko, A.M., Koval'kov V.K., Fomin L.V. Simulation of creep process on the basis of observed data approximation. Mashinostroenie i Inzhenernoe Obrazovanie, 2011, no. 2, pp. 52–57. (In Russian).
  6. Koval’kov V.K., Nazarov V.V., Novotnyi S.V. Procedure of high-temperature within complex stressed state.  Zavod. Lab. Diagn. Mater., 2006, vol. 72, no. 4, pp. 42–44. (In Russian).


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Article reference

Nazarov V. V. Approximation of the Creep Curve up to the Moment of Necking // Diagnostics, Resource and Mechanics of materials and structures. - 2020. - Iss. 3. - P. 61-66. -
DOI: 10.17804/2410-9908.2020.3.061-066. -
URL: http://eng.dream-journal.org/issues/2020-3/2020-3_116.html
(accessed: 06/22/2024).

 

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Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  S.V. Smirnov
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