Creep of Tubes under External Pressure
- Authors: Vorob’ev E.E.1,2, Peregud M.M.1, Khokhunova T.N.1, Mileshkina O.Y.1, Bekrenev S.A.1, Markelov V.A.1, Shtremel’ M.A.2
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Affiliations:
- AO VNIINM
- National University of Science and Technology MISiS
- Issue: Vol 2019, No 10 (2019)
- Pages: 1112-1124
- Section: Applied Problems of Strength and Plasticity
- URL: https://journals.rcsi.science/0036-0295/article/view/173648
- DOI: https://doi.org/10.1134/S0036029519100392
- ID: 173648
Cite item
Abstract
29 tubes made of an E110 alloy for VVER and PWR reactors are subjected to creep tests under external pressure (temperature of 350 and 380°C, circumferential stress of 70–130 MPa, holding time up to 4250 h). Creep is found to be accelerated after deformation up to 0.9% and ovality up to b/a = 0.86 and is ended in the collapse of a tube. The equations of tube equilibrium and creep under pressure are generalized for tubes of any ovality (ellipses of any eccentricity). The solutions to these equations predict the presence of a general curve in the contour length–eccentricity coordinates and give tube instability conditions under pressure.
Keywords
About the authors
E. E. Vorob’ev
AO VNIINM; National University of Science and Technology MISiS
Author for correspondence.
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060; Moscow, 119049
M. M. Peregud
AO VNIINM
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060
T. N. Khokhunova
AO VNIINM
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060
O. Yu. Mileshkina
AO VNIINM
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060
S. A. Bekrenev
AO VNIINM
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060
V. A. Markelov
AO VNIINM
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 123060
M. A. Shtremel’
National University of Science and Technology MISiS
Email: vorobyov-egor@yandex.ru
Russian Federation, Moscow, 119049