scholarly journals Development of inversion analysis method for photoelastic measurement of 3D stress state

2002 ◽  
Vol 5 ◽  
pp. 61-66
Author(s):  
Kenji OGUNI ◽  
Lalith WIJERATHNE ◽  
Muneo HORI
Keyword(s):  
Stress State ◽  
Analysis Method ◽  
3D Stress State ◽  
Inversion Analysis

scholarly journals The Langmuir Probe Onboard CSES: data inversion analysis method and first results

2018 ◽  
Vol 2 (6) ◽  
pp. 1-10 ◽  
Author(s):  
Rui Yan ◽  
◽  
YiBing Guan ◽  
XuHui Shen ◽  
JianPing Huang ◽  
...  
Keyword(s):  
Langmuir Probe ◽  
Analysis Method ◽  
Data Inversion ◽  
First Results ◽  
Inversion Analysis

One-Way Cyclic Behavior of Saturated Clay in 3D Stress State

2019 ◽  
Vol 145 (10) ◽  
pp. 04019077 ◽  
Author(s):  
Chuan Gu ◽  
Yongzheng Wang ◽  
YuJun Cui ◽  
Yuanqiang Cai ◽  
Jun Wang
Keyword(s):  
Stress State ◽  
Cyclic Behavior ◽  
Saturated Clay ◽  
3D Stress State

Diffraction stress analysis of highly planar-faulted, macroscopically elastically anisotropic thin films and application to tensilely loaded nanocrystalline Ni and Ni(W)

2014 ◽  
Vol 47 (1) ◽  
pp. 291-302 ◽  
Author(s):  
Silke Julia Birgit Kurz ◽  
Udo Welzel ◽  
Ewald Bischoff ◽  
Eric Jan Mittemeijer
Keyword(s):  
Thin Films ◽  
Stress State ◽  
Stress Analysis ◽  
Biaxial Stress ◽  
Stress Factors ◽  
Group Method ◽  
Analysis Method ◽  
Biaxial Stress State ◽  
Successful Separation ◽  
Increased Strength

The presence of planar faults complicates the diffraction stress analysis enormously owing to fault-induced displacement, broadening and asymmetry of the Bragg reflections. A dedicated stress-analysis method has been developed for highly planar-faulted, fibre-textured thin films of cubic crystal symmetry, using only specific reflections for diffraction stress analysis. The effect of unjustified use of other reflections has been demonstrated in the course of application of the method to Ni and Ni(W) thin films exhibiting excessive faulting and subjected to (1) a planar, rotationally symmetric stress state and (2) a planar biaxial stress state. In case 1 the crystallite-group method has been used, whereas in case 2 the stress-analysis method based on X-ray stress factors had to be applied. The successful separation of stress- and fault-induced reflection displacements has enabled the investigation of the mechanical behaviour of Ni and Ni(W) thin films byin situstress measurements during tensile loading, thereby exposing pronounced stiffness and increased strength by alloying with W.

The Stress Variation and Mechanism of Bearing Capacity Increment in Reinforced Foundation

2011 ◽  
Vol 71-78 ◽  
pp. 3769-3774
Author(s):  
Peng Ying Yi
Keyword(s):  
Numerical Simulation ◽  
Stress State ◽  
Normal Stress ◽  
Yield Criterion ◽  
Vertical Direction ◽  
Analysis Method ◽  
Stress Variation ◽  
Geometry Analysis ◽  
Strength Increment ◽  
Extreme State

For study the influence caused by geobelt and the mechanism of the strength increment in the reinforced foundation, the author analyzed stress state in each zone with reinforced and unreinforced, combined with the Mohr-Coulomb yield criterion, found the stress variation relationship between and in both foundations, which are found by the stress analysis method and geometry analysis method under the extreme state condition. The extreme normal stress incremental of vertical direction was solved in reinforced foundation. The essence of strength increment in reinforced foundation is revealed. The reliability of theoretical analysis was proved by numerical simulation. The conclusions show that increases in the active extreme equilibrium zone I and the passive extreme equilibrium zone Ⅲ, increases upper geobelt and decreases under geobelt in the transition zone ; the normal stress of each zone have changed correspondingly, the incremental variation of in I zone and the in Ⅲ zone has pseudo-cohesion.

Initiation of static instability in the submarine Nerlerk berm

1993 ◽  
Vol 30 (6) ◽  
pp. 895-904 ◽  
Author(s):  
Poul V. Lade
Keyword(s):  
Shear Strength ◽  
Stress State ◽  
Yield Surface ◽  
Failure Surface ◽  
Triaxial Tests ◽  
Analysis Method ◽  
Trigger Mechanism ◽  
Plastic Properties ◽  
Static Instability ◽  
Undrained Conditions

According to stability postulates by other authors, soils that exhibit nonassociated flow may become unstable when exposed to certain stress paths inside the failure surface. Several series of conventional triaxial tests on fully saturated specimens have been performed to study the regions of stable and unstable behavior. For saturated specimens that tend to compress, undrained conditions lead to effective stress paths directed within the region of potential instability, and instability is observed, provided the yield surface opens up in the outward direction of the hydrostatic axis. Thus, instability occurs inside the failure surface. Instability is not synonymous with failure, although both lead to catastrophic events. The location of the region of potential instability and its determination are discussed. The submarine Nerlerk berm, which suffered six slides during its construction, is analyzed using a newly developed method of instability analysis. It is shown that conventional slope stability methods do not capture the mechanics of instability and subsequent liquefaction. The proposed analysis method is based on the location of the region of potential instability and the stress state in the ground. In addition, a trigger mechanism is required to initiate the instability. These topics are discussed with reference to the slides in the Nerlerk berm. Key words : instability, nonassociated flow, plastic properties, sand, shear strength, submarine slope.

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