A microstructural model of shape memory alloys (SMA) describing their deformation and fatigue fracture is presented. A new criterion of fracture has been developed which takes into account the effect of hydrostatic pressure, deformation defects and material damage. It is shown that the model can describe the fatigue fracture of SMA under various thermomechanical cycling regimes. Results of calculating the number of cycles to failure at thermocycling under a constant stress, at symmetric two-sided cyclic deformation, at straining-unloading cycles, at cycling in the regime of the thermodynamic cycles of a SMA working body in the hard (strain controlled) and soft (stress controlled) working cycles, is studied. Results of calculating the number of cycles to failure are presented for different parameters of these cycles.
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2 May 2018
THE EIGHTH POLYAKHOV’S READING: Proceedings of the International Scientific Conference on Mechanics
29 January–2 February 2018
Saint Petersburg, Russia
Research Article|
May 02 2018
Microstructural modeling of fatigue fracture of shape memory alloys at thermomechanical cyclic loading Available to Purchase
Fedor S. Belyaev;
Fedor S. Belyaev
a)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
a)Corresponding author: [email protected]
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Margarita E. Evard;
Margarita E. Evard
b)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
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Aleksandr E. Volkov
Aleksandr E. Volkov
c)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
Search for other works by this author on:
Fedor S. Belyaev
a)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
Margarita E. Evard
b)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
Aleksandr E. Volkov
c)
Saint Petersburg State University
, 7-9 Universitetskaya Nab., St. Petersburg, 199034, Russia
AIP Conf. Proc. 1959, 070003 (2018)
Citation
Fedor S. Belyaev, Margarita E. Evard, Aleksandr E. Volkov; Microstructural modeling of fatigue fracture of shape memory alloys at thermomechanical cyclic loading. AIP Conf. Proc. 2 May 2018; 1959 (1): 070003. https://doi.org/10.1063/1.5034678
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