Influence of stress state volume on limit equilibrium of elasto-plastic plate with regular system of internal cracks

2020 ◽  
Vol 18 (0) ◽  
Author(s):  
M. M. Nykolyshyn ◽  
T. M. Nykolyshyn
Keyword(s):  
Stress State ◽  
Limit Equilibrium ◽  
Regular System ◽  
Plastic Plate

Numerical Limit Equilibrium Method of Three-Dimensional Stability for Landslide

2011 ◽  
Vol 250-253 ◽  
pp. 3927-3933
Author(s):  
Wei Zhong ◽  
Xiao Qing Chen ◽  
Tao Yang
Keyword(s):  
Stress State ◽  
Safety Factor ◽  
Limit Equilibrium ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Actual Case ◽  
Sliding Mechanism ◽  
Coulomb Criterion ◽  
Sample Case ◽  
Slip Layer

The three-dimensional model of slop in numerical calculation is established. And high precision eight-node hexahedron element is used to build the finite element grid of slip layer. The slip layer material is simulated by an ideal elastic-plastic model based on the Mohr-Coulomb Criterion. Three-dimensional stress state and slide direction of the slip layer zone is obtained by numerical computation. So, based on the analysis of the three-dimensional stress state of the slip layer zone, in this article, the author defines the point safety factor as the ratio of the shear strength of the slip zone to the shear stress parallel to the sliding direction, and defines the safety factor of the landslide as the average of the zone point safety factor with its zone as weight number. The sliding mechanism is studied through zone point safety factor, and stability of landslide can be evaluated through the safety factor. Sample case shows that the calculated result is in accordance with the actual case.

Safety Factor Calculation Method of Anchored Slope Based on Pseudo Cohesion Theory

2012 ◽  
Vol 170-173 ◽  
pp. 453-456
Author(s):  
Chong Shi ◽  
Yu Long Zhang ◽  
Qiang Zahng ◽  
Hai Li Wang ◽  
Sheng Nian Wang
Keyword(s):  
Stress State ◽  
Safety Factor ◽  
Limit Equilibrium ◽  
Stability Of Slope ◽  
Compatibility Principle ◽  
Cohesion Theory ◽  
The Stability ◽  
Concept Theory ◽  
Searching Method ◽  
Short Time

The stability of slope is closely related to stress-state. Assumptions about stress-state in the rigid body limit equilibrium method are not satisfied with the demands of deformation compatibility principle. So the stability analysis method compatible with slope stress and anchorage system should be established for anchored slope. The pseudo cohesion concept theory is used to analyze the improvement of stress-state due to anchoring measures, and the stability safety factor of anchored slope by sliding surfaces searching method is obtained, in which grid control is used and embedded in FLAC3D. The result shows that the safety factor with the pseudo cohesion theory is 1.43 while the strength reduction method is 1.41. The similar results for them show the validity of proposed method. What's more, the suggested method has an advantage of short time consuming.

Short Stress State Questionnaire

2015 ◽  
Vol 31 (1) ◽  
pp. 20-30 ◽  
Author(s):  
William S. Helton ◽  
Katharina Näswall
Keyword(s):  
Stress State ◽  
Factor Structure ◽  
Human Performance ◽  
Self Report ◽  
Confirmatory Factor ◽  
Stress States ◽  
Related Stress ◽  
Using Data ◽  
Task Conditions ◽  
Multiple Samples

Conscious appraisals of stress, or stress states, are an important aspect of human performance. This article presents evidence supporting the validity and measurement characteristics of a short multidimensional self-report measure of stress state, the Short Stress State Questionnaire (SSSQ; Helton, 2004 ). The SSSQ measures task engagement, distress, and worry. A confirmatory factor analysis of the SSSQ using data pooled from multiple samples suggests the SSSQ does have a three factor structure and post-task changes are not due to changes in factor structure, but to mean level changes (state changes). In addition, the SSSQ demonstrates sensitivity to task stressors in line with hypotheses. Different task conditions elicited unique patterns of stress state on the three factors of the SSSQ in line with prior predictions. The 24-item SSSQ is a valid measure of stress state which may be useful to researchers interested in conscious appraisals of task-related stress.

F.VIII R:Ag in Hepatitis

1979 ◽  
Author(s):  
R. Kotitschke ◽  
J. Scharrer
Keyword(s):  
Chronic Hepatitis ◽  
Blood Donors ◽  
Blood Donation ◽  
Normal Population ◽  
Rabbit Antiserum ◽  
Two Dimensional ◽  
Plastic Plate ◽  
Significant Difference ◽  
Acute Hepatitis B ◽  
The One

F.VIII R:Ag was determined by quantitative immunelectrophoresis (I.E.) with a prefabricated system. The prefabricated system consists of a monospecific f.VIII rabbit antiserum in agarose on a plastic plate for the one and two dimensional immunelectrophoresis. The lognormal distribution of the f.VIII R:Ag concentration in the normal population was confirmed (for n=70 the f.VIII R:Ag in % of normal is = 95.4 ± 31.9). Among the normal population there was no significant difference between blood donors (one blood donation in 8 weeks; for n=43 the f.VIII R:Ag in % of normal is = 95.9 ± 34.0) and non blood donors (n=27;f.VIII R:Ag = 94.6 ± 28.4 %). The f.VIII R:Ag concentration in acute hepatitis B ranged from normal to raised values (for n=10, a factor of 1.8 times of normal was found) and was normal again after health recovery (n=10, the factor was 1.0). in chronic hepatitis the f.VIII R:Ag concentration was raised in the majority of the cases (for n=10, the factor was 3.8). Out of 22 carrier sera 20 showed reduced, 2 elevated levels of the f.VIII R:Ag concentration. in 5 sera no f.VIII R:Ag could be demonstrated. The f.VIII R:Ag concentration was normal for n=10, reduced for n=20 and elevated for n=6 in non A-non B hepatitis (n=36). Contrary to results found in the literature no difference in the electrophoretic mobility of the f.VIII R:Ag was found between hepatitis patients sera and normal sera.

Sign in / Sign up

Export Citation Format

Share Document