On low-cycle fatigue of austenitic steel. Part I: Changes of Poisson's ratio and elastic anisotropy

2021 ◽  
Vol 168 ◽  
pp. 103567
Author(s):  
V.V. Mishakin ◽  
A.V. Gonchar ◽  
K.V. Kurashkin ◽  
V.A. Klyushnikov ◽  
M. Kachanov
Keyword(s):  
Austenitic Steel ◽  
Poisson’S Ratio ◽  
Elastic Anisotropy ◽  
Low Cycle Fatigue ◽  
Steel Part ◽  
Poisson's Ratio ◽  
Cycle Fatigue

Monitoring of low-cycle fatigue degradation in X6CrNiTi18-10 austenitic steel

2001 ◽  
Vol 296 (1-3) ◽  
pp. 305-311 ◽  
Author(s):  
M. Grosse ◽  
M. Niffenegger ◽  
D. Kalkhof
Keyword(s):  
Austenitic Steel ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue

On: “Long‐wave elastic anisotropy in transversely isotropic media” by J. G. Berryman, and “Seismic velocities in transversely isotropic media” by F. K. Levin (GEOPHYSICS, v. 44, May 1979, p. 896–917 and p. 918–936, respectively).

Geophysics ◽  
1981 ◽  
Vol 46 (3) ◽  
pp. 336-338 ◽  
Author(s):  
Felix M. Lyakhovitskiy
Keyword(s):  
Poisson’S Ratio ◽  
Elastic Anisotropy ◽  
Transversely Isotropic ◽  
Layered Media ◽  
Thin Layers ◽  
Poisson's Ratio ◽  
Seismic Velocities ◽  
Long Wave ◽  
Transversely Isotropic Media ◽  
Isotropic Media

Berryman and Levin made an assumption about constancy or limited variations of Poisson’s ratio in the thin layers, in their analyses of elastic anisotropy in thin‐layered media. Berryman states (p. 913): “Rare cases can occur with large variations in Poisson’s ratio.” However, on p. 911 Berryman does point out (with reference to Benzing) that range of variations of the parameter γ = VS/VP from 0.45 to 0.65 is typical of rocks. That corresponds to a range of variations of Poisson’s ratio of 0.373 to 0.134 (i.e., almost three times as much).

Low-Cycle Fatigue under Biaxial Stress

1974 ◽  
Vol 188 (1) ◽  
pp. 657-671 ◽  
Author(s):  
M. W. Parsons ◽  
K. J. Pascoe
Keyword(s):  
Austenitic Steel ◽  
Abrupt Change ◽  
Low Cycle Fatigue ◽  
Axial Loading ◽  
Strain Range ◽  
Fatigue Behaviour ◽  
Biaxial Stress ◽  
Cycle Fatigue ◽  
Biaxial Strain ◽  
Total Strain Range

The low-cycle fatigue behaviour of a ferritic and an austenitic steel have been studied under various conditions of reversed biaxial strain. These cyclically softened and hardened respectively. In all cases, relationships of the form were found between total strain range Δε t and life Nf for lives in the range 102−105 cycles, with an abrupt change of β at intermediate lives. Variation of state of strain affected both β and κ. Various theories for the correlation of fatigue behaviour under multi-axial loading have been reviewed and compared with these results. None was found to account adequately for the effect of straining régime with the materials tested.

Can gas sand have a large Poisson’s ratio?

Geophysics ◽  
2008 ◽  
Vol 73 (2) ◽  
pp. E51-E57 ◽  
Author(s):  
Jack P. Dvorkin
Keyword(s):  
Poisson’S Ratio ◽  
Elastic Anisotropy ◽  
Laboratory Data ◽  
Poor Quality ◽  
Poisson's Ratio ◽  
Quality Data ◽  
Poor Quality Data ◽  
Well Data ◽  
Seismic Scale

Laboratory data supported by granular-medium and inclusion theories indicate that Poisson’s ratio in gas-saturated sand lies within a range of 0–0.25, with typical values of approximately 0.15. However, some well log measurements, especially in slow gas formations, persistently produce a Poisson’s ratio as large as 0.3. If this measurement is not caused by poor-quality data, three in situ situations — patchy saturation, subresolution thin layering, and elastic anisotropy — provide a plausible explanation. In the patchy saturation situation, the well data must be corrected to produce realistic synthetic seismic traces. In the second and third cases, the effect observed in a well is likely to persist at the seismic scale.

Microstructure and martensitic transformation in 316L austenitic steel during multiaxial low cycle fatigue at room temperature

2019 ◽  
Vol 767 ◽  
pp. 138407 ◽  
Author(s):  
Veronika Mazánová ◽  
Milan Heczko ◽  
Viktor Škorík ◽  
Alice Chlupová ◽  
Jaroslav Polák ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Austenitic Steel ◽  
Room Temperature ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue
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