Description of the creep process and long-term strength by equations with one scalar damage parameter

1994 ◽  
Vol 35 (5) ◽  
pp. 726-734 ◽  
Author(s):  
B. V. Gorev ◽  
I. D. Klopotov
Keyword(s):  
Damage Parameter ◽  
Creep Process ◽  
Term Strength ◽  
Scalar Damage Parameter

Creep process kinetics and long-term strength of zirconium carbide. Communication 2

1980 ◽  
Vol 12 (3) ◽  
pp. 264-268 ◽  
Author(s):  
P. V. Zubarev ◽  
A. G. Shmelev
Keyword(s):  
Zirconium Carbide ◽  
Creep Process ◽  
Term Strength ◽  
Process Kinetics

scholarly journals Finite Element Analysis of Influence of Non-homogenous Temperature Field on Designed Lifetime of Spatial Structural Elements under Creep Conditions

2016 ◽  
Vol 1 (1) ◽  
pp. 253-262 ◽  
Author(s):  
S.O. Pyskunov ◽  
Yu.V. Maksimyk ◽  
V.V. Valer
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Fracture Process ◽  
Damage Parameter ◽  
Problem Solution ◽  
Structural Elements ◽  
Element Analysis ◽  
Scalar Damage Parameter

AbstractThe techniques of modeling of continual fracture process for spatial bodies under long-term static force loading condition in non-homogenous temperature field are presented. The scalar damage parameter is used to describe the material continual fracture process. A stress-strain problem solution made with semianalytic finite element method (SFEM). Results of lifetime determination of responsible parts are presented.

Creep process kinetics and long-term strength of zirconium carbide. Communication 1

1980 ◽  
Vol 12 (2) ◽  
pp. 142-148 ◽  
Author(s):  
P. V. Zubarev ◽  
A. G. Shmelev
Keyword(s):  
Zirconium Carbide ◽  
Creep Process ◽  
Term Strength ◽  
Process Kinetics

Rock Long-Term Strength Parameters Determination of a Salt Cavern Gas Storage

2013 ◽  
Vol 353-356 ◽  
pp. 1685-1688
Author(s):  
Li Na Ran ◽  
Hua Bin Zhang ◽  
Zhi Yin Wang
Keyword(s):  
Mechanical Properties ◽  
Rock Salt ◽  
Gas Storage ◽  
Surrounding Rock ◽  
Creep Process ◽  
Term Strength ◽  
Salt Cavern ◽  
Study Results ◽  
Salt Cavern Gas Storage

In order to determine the long-term mechanical properties of surrounding rock of salt cavern gas storage, long tri-axial creep test studies on rock salt of the field were carried out. Based on the test data, long-term strength of rock salt was determined, and comparatively analysis was conducted combined with of the instantaneous test. The study results show that: Considering the axial strain, radial strain and volumetric strain to determine the long-term strength of rock salt can ensure reliability of the results. Under the same condition, the less salt content, the value of long-term strength is higher. Tri-axial creep process has a different effect degree between cohesion and internal friction angle; it is more sensitive to cohesion. The strain limit should be considered for the stability analysis of multi-bedded salt cavern gas storage construction and pay more attention about the mechanical properties of the interlayer parts. The study results provide references for researching the surrounding rock long-term mechanical properties of salt cavern gas storage.

Use of a vector damage parameter in modeling of long-term strength of metals

2016 ◽  
Vol 51 (3) ◽  
pp. 315-320 ◽  
Author(s):  
A. M. Lokoshchenko
Keyword(s):  
Damage Parameter ◽  
Term Strength

scholarly journals An Experimental Study on the Creep Characteristics of Sandstone in the Interval of Different Critical Stresses

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Chao Yang ◽  
Xingchen Dong ◽  
Xuan Xu ◽  
Qiancheng Sun
Keyword(s):  
Failure Time ◽  
Strain Curve ◽  
Creep Model ◽  
Creep Process ◽  
Term Strength ◽  
Creep Tests ◽  
Critical Stresses ◽  
Brittle Sandstone ◽  
Time Required

Creep tests on brittle sandstone specimens were performed to investigate the time-dependent characteristics in the interval of different critical stresses. The results showed that failure will not occur when the loaded stress σ1 is less than the critical stress of dilation σcd, while all specimens were destroyed when σ1 is larger than σcd. In addition, the value of σcd was very close to the long-term strength obtained by the method of the isochronous stress-strain curve. Therefore, σcd can be regarded as the long-term strength of the sandstone specimens. When σ1 is larger than σcd, the time required for the failure of specimen tf decreases with the increase of σ1; the creep rate dε/dt increases with time t, and the specimen will be destroyed when it reaches a maximum value (dε/dt)max. Both relationships tf and σ1 and (dε/dt)max and σ1 can be described by the exponential function. Then, a nonlinear damage creep model considering the deformation damage and strength damage in the interval of different critical stresses was established, which can describe the whole creep process and predict the failure time of sandstone specimens.

Subcritical Crack Growth and Long-Term Strength in Rock and High-Strength and Ultra Low-Permeability Concrete

2009 ◽  
Vol 58 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Yoshitaka NARA ◽  
Masafumi TAKADA ◽  
Daisuke MORI ◽  
Hitoshi OWADA ◽  
Tetsuro YONEDA ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
High Strength ◽  
Low Permeability ◽  
Term Strength
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