Determination of the Period of Subcritical Growth of Small Plane High-Temperature Creep Cracks in Structural Elements

2022 ◽  
Author(s):  
О. Ye. Andreikiv ◽  
І. Ya. Dolinska
Keyword(s):  
High Temperature ◽  
High Temperature Creep ◽  
Structural Elements ◽  
Subcritical Growth ◽  
Temperature Creep

On the determination of activation area in high temperature creep

1971 ◽  
Vol 5 (2) ◽  
pp. 137-141 ◽  
Author(s):  
M. Pahutová ◽  
J. Čadek ◽  
P. Ryš
Keyword(s):  
High Temperature ◽  
High Temperature Creep ◽  
Activation Area ◽  
Temperature Creep

Estimation of the Subcritical Growth Period for a Through Crack of High-Temperature Creep in a Two-Layer Plate

2014 ◽  
Vol 46 (3) ◽  
pp. 328-335
Author(s):  
O. E. Andreikiv ◽  
V. R. Skal’s’kyi ◽  
I. Ya. Dolins’ka ◽  
L. N. Dobrovol’s’ka
Keyword(s):  
High Temperature ◽  
Growth Period ◽  
High Temperature Creep ◽  
Subcritical Growth ◽  
Temperature Creep

High-temperature creep and long-term strength of structural elements under cyclic loading

2008 ◽  
Vol 40 (5) ◽  
pp. 531-537 ◽  
Author(s):  
D. V. Breslavsky ◽  
O. K. Morachkovsky ◽  
O. A. Tatarinova
Keyword(s):  
High Temperature ◽  
Cyclic Loading ◽  
High Temperature Creep ◽  
Term Strength ◽  
Structural Elements ◽  
Temperature Creep

Determination of Copper Self-Diffusion Coefficients on the Base of High-Temperature Creep Data

2006 ◽  
Vol 249 ◽  
pp. 115-118 ◽  
Author(s):  
Danil V. Vaganov ◽  
Sergei Zhevnenko
Keyword(s):  
High Temperature ◽  
Diffusion Coefficients ◽  
High Temperature Creep ◽  
Creep Data ◽  
Measuring Device ◽  
Self Diffusion ◽  
Temperature Creep ◽  
Self Diffusion Coefficient ◽  
Determination Of Copper

Indirect method is used for determination of copper self-diffusion coefficient on the base of high-temperature creep data. These data are obtained by the use of the new measuring device and assuming that Nabarro-Herring mechanism acts.

scholarly journals NUMERICAL SIMULATION OF HIGH-TEMPERATURE CREEP OF ELEMENTS OF HEAT-RESISTANT ALLOYS STRUCTURES TAKING INTO ACCOUNT NEUTRON IRRADIATION EFFECTS

2019 ◽  
Vol 81 (3) ◽  
pp. 345-358
Author(s):  
A.A. Antipov ◽  
V.A. Gorokhov ◽  
V.V. Egunov ◽  
D.A. Kazakov ◽  
S.A. Kapustin ◽  
...  
Keyword(s):  
High Temperature ◽  
Brittle Fracture ◽  
Neutron Flux ◽  
Neutron Irradiation ◽  
Creep Model ◽  
High Temperature Creep ◽  
Structural Elements ◽  
Material Function ◽  
Heat Resistant ◽  
Temperature Creep

The technique of numerical research on the basis of FEM processes of deformation and damage accumulation in the structural elements of heat-resistant alloys under conditions of high-temperature creep taking into account the influence of neutron irradiation is developed. The description of the mechanical behavior of the material is carried out within the framework of the previously developed general model of the damaged material and the creep model for non-irradiated heat-resistant alloys, supplemented by taking into account the effect of irradiation on the creep rate and the appearance of brittle fracture in a given range of temperature variation and irradiation intensity. The defining relations of the creep model of the irradiated material were obtained by modifying the creep model of the non-irradiated material: a material function was introduced, taking into account the effect of the flux of neutrons on the rate of thermal creep deformation; a material function was introduced that takes into account the effect of the neutron flux on the creep surface radius; A material function was introduced, which takes into account the effect of the neutron flux on the ultimate value of the dissipation energy at full power. To simulate the processes of brittle fracture during creep under neutron irradiation conditions, it is assumed that the destructive values of effective normal stresses are a function of temperature, flux of neutrons and the current value of accumulated creep. The material functions of the model were obtained from the results of basic experiments conducted at the Research Institute of Mechanics for the heat-resistant alloy without irradiation under consideration and the available experimental data on the study of the creep of this alloy during its irradiation. Based on the proposed model, a numerical method for solving problems of high-temperature creep of structures made of heat-resistant alloys under neutron irradiation was developed and implemented within the UPAKS computing complex. To verify and illustrate the capabilities of the developed methodological and software tools, a number of problems of modeling the processes of high-temperature creep and destruction of structural elements made of the high-temperature alloy under consideration are solved.

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