Residual stress-strain state of the collector assembly of a steam generator in the process of press-fitting of heat-exchange pipes

1998 ◽  
Vol 30 (2) ◽  
pp. 152-168
Author(s):  
G. V. Stepanov ◽  
V. V. Kharchenko
Keyword(s):  
Residual Stress ◽  
Heat Exchange ◽  
Steam Generator ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Press Fitting

Effect of Sludge on the Stress–Strain State of Heat-Exchange Tubes of a Steam Generator

2019 ◽  
Vol 55 (1) ◽  
pp. 86-94 ◽  
Author(s):  
P. Z. Lugovoi ◽  
A. P. Shugailo ◽  
Ya. D. Kruglyi ◽  
A. M. Kolupaev
Keyword(s):  
Heat Exchange ◽  
Steam Generator ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

NUMERICAL INVESTIGATION OF THERMOMECHANICAL PROCESSES UNDER SHORT-PULSED LASER IRRADIATION OF A HALF-SPACE

2021 ◽  
Vol 6 ◽  
pp. 55-65
Author(s):  
Kamila Storchak ◽  
◽  
Nina Yakovenko ◽  
Olga Polonevych ◽  
Irina Sribna ◽  
...  
Keyword(s):  
Residual Stress ◽  
Laser Irradiation ◽  
Half Space ◽  
Strain State ◽  
Thermal Stresses ◽  
Equations Of Motion ◽  
Thermomechanical Loading ◽  
Stress Strain ◽  
Stress Strain State ◽  
Residual Strains

The laser irradiation of metallic surfaces by intense heat sources is used for the generation of short probing pulses, which propagate into thin specimens and enable one to estimate their structure and mechanical properties within the framework of the classical acoustic approach. High thermal stresses and residual strains occur during the short-term irradiation of the surface of a construction by an energy source of high density. In the present work, we solve the axially symmetric problem of a half-space under thermomechanical loading. We take into account the influence of volume and inelastic characteristics of separate phases on the residual stress-strain state of the half-space. The statement of the problem includes: Cauchy relations, equations of motion, heat conduction equation, initial conditions, thermal and mechanical boundary conditions. The thermomechanical behavior of an isotropic material is described by the Bodner-Partom unified model of flow. The problem is solved with using the finite element technique. The numerical realization of our problem is performed with the help of step-by-step time integration. The equations of motion are integrated by the Newmark method. The residual stress-strain state is described using the method of numerical solution of the axisymmetric dynamic problem for a half-space under thermomechanical loading and the flow model. We established that microstructural transformations, which are taken into account due to the thermophase volume strain and dependence of inelastic characteristics of the material on the phase composition, significantly reduce residual inelastic strain and promote the appearance of compressive stresses. The three-zone region of residual stresses field formation is obtained.

Calculation of residual stress-strain state of deposited steel sheet plates

2021 ◽  
Vol 2021 (5) ◽  
pp. 46-50
Author(s):  
I.K. Senchenkov ◽  
◽  
I.O. Ryabtsev ◽  
O.P. Chervinko ◽  
A.A. Babinets ◽  
...  
Keyword(s):  
Residual Stress ◽  
Strain State ◽  
Steel Sheet ◽  
Stress Strain ◽  
Stress Strain State

Effect of the layout of small-and large-series WWER-1000 reactors of nuclear power plants on the stress-strain state of the header-steam generator connector weldment

2007 ◽  
Vol 39 (5) ◽  
pp. 539-544 ◽  
Author(s):  
G. V. Stepanov ◽  
V. V. Kharchenko ◽  
A. I. Babutskii ◽  
S. V. Kobel’skii ◽  
I. V. Orynyak ◽  
...  
Keyword(s):  
Steam Generator ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Strain State ◽  
Large Series ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals Numerical and Analytical Modeling of Permanent Deformations in Panels Made of Nanomodified Carbon Fiber Reinforced Plastic with Asymmetric Packing

2021 ◽  
Vol 15 ◽  
pp. 172-180
Author(s):  
S. Radaev
Keyword(s):  
Residual Stress ◽  
Carbon Fiber ◽  
Strain State ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Fiber Reinforced Plastic ◽  
Stress Strain State ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

In this paper, a mathematical model of a multilayer panel made of nanomodified carbon fiber reinforced plastic with asymmetric packing is proposed. The introduction of nanosized particles into the composition of the composite or its components (fiber or binder) allows not only to increase its physical and mechanical properties, but also to improve the picture of the residual stress-strain state. The paper investigates the effect of nanomodification of carbon fiber reinforced plastic on the residual stress-strain state after molding using numerical and analytical methods. Numerous results of computational experiments have been obtained. The results of numerical and analytical modeling are compared with experimental data. Conclusions are drawn about the possibility of reducing the residual stress-strain state in structures with asymmetric reinforcement schemes when using a matrix containing carbon nanoparticles. A mathematical model of a multilayer panel made of nano-modified carbon fiber with asymmetric packing has been built. Investigation of the residual stress-strain state of structural elements made of carbon fiber reinforced plastic made it possible to reveal the possibility of reducing the residual stress-strain state and leash in structures with asymmetric reinforcement schemes when using a matrix containing carbon nanoparticles.

Stress-strain state of the header-steam generator connector weldment induced by local thermal treatment

2006 ◽  
Vol 38 (6) ◽  
pp. 595-600 ◽  
Author(s):  
G. V. Stepanov ◽  
V. V. Kharchenko ◽  
A. I. Babutskii ◽  
V. I. Kravchenko ◽  
A. A. Kotlyarenko ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Steam Generator ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

Stress-Strain State Evaluation of a Welded Joint of Hot Collector to Nozzle of NPP Steam Generator PGV-1000

2003 ◽  
Vol 35 (5) ◽  
pp. 536-544 ◽  
Author(s):  
G. V. Stepanov ◽  
V. V. Kharchenko ◽  
A. I. Babutskii AFFIL = Pisarenko Institu ◽  
S. V. Romanov ◽  
P. P. Voroshko ◽  
...  
Keyword(s):  
Steam Generator ◽  
Strain State ◽  
Welded Joint ◽  
Stress Strain ◽  
Stress Strain State ◽  
State Evaluation
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