Shear Stress Distribution in Rock-Cemented Discontinuities under Direct Shear: Theoretical Analysis and Numerical Validation

2022 ◽  
Vol 22 (2) ◽  
Author(s):  
Shuai Heng ◽  
Yingying Guo ◽  
Xianzhong Li ◽  
Ruitian Zhao
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Theoretical Analysis ◽  
Shear Stress Distribution ◽  
Direct Shear ◽  
Numerical Validation

scholarly journals Numerical Simulation of the Shear Behaviour of Cement Grout

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Jianhang Chen ◽  
Fan Zhang ◽  
Hongbao Zhao ◽  
Junwen Zhang
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Stress Distribution ◽  
Normal Stress ◽  
Shear Failure ◽  
Cement Grout ◽  
Shear Stress Distribution ◽  
Shear Behaviour ◽  
Direct Shear ◽  
Failure Plane

Cement grout is widely used in civil engineering and mining engineering. The shear behaviour of the cement grout plays an important role in determining the stability of the systems. To better understand the shear behaviour of the cement grout, numerical direct shear tests were conducted. Cylindrical cement grout samples with two different strengths were created and simulated. The numerical results were compared and validated with experimental results. It was found that, in the direct shear process, although the applied normal stress was constant, the normal stress on the contacted shear failure plane was variable. Before the shear strength point, the normal stress increased slightly. Then, it decreased gradually. Moreover, there was a nonuniform distribution of the normal stress on the contacted shear failure plane. This nonuniform distribution was more apparent when the shear displacement reached the shear strength point. Additionally, there was a shear stress distribution on the contacted shear failure plane. However, at the beginning of the direct shear test, the relative difference of the shear stresses was quite small. In this stage, the shear stress distribution can be assumed uniform on the contacted shear failure plane. However, once the shear displacement increased to around the shear strength point, the relative difference of the shear stresses was obvious. In this stage, there was an apparent nonuniform shear stress distribution on the contacted shear failure plane.

Analysis of elliptic vanes

1992 ◽  
Vol 29 (6) ◽  
pp. 993-997
Author(s):  
Vincent Silvestri ◽  
Claudette Tabib
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Theoretical Analysis ◽  
Key Words ◽  
Field Investigation ◽  
Technical Note ◽  
Shear Stress Distribution ◽  
Stress Distributions ◽  
Distribution Field

This technical note presents the results of a theoretical analysis of smooth elliptic vanes. Uniform and triangular shear stress distributions are used to obtain geometric vane factors. A preliminary field investigation has been carried out by means of two elliptic vanes. Key words : vanes, elliptic shapes, uniform, triangular, shear stress distribution, field investigation.

scholarly journals Assessing Machine Learning versus a Mathematical Model to Estimate the Transverse Shear Stress Distribution in a Rectangular Channel

Mathematics ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 596
Author(s):  
Babak Lashkar-Ara ◽  
Niloofar Kalantari ◽  
Zohreh Sheikh Khozani ◽  
Amir Mosavi
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Fuzzy Inference ◽  
Rectangular Channel ◽  
Tsallis Entropy ◽  
Shear Stress Distribution ◽  
Data Series ◽  
Shear Stresses ◽  
Inference System ◽  
Aspect Ratios

One of the most important subjects of hydraulic engineering is the reliable estimation of the transverse distribution in the rectangular channel of bed and wall shear stresses. This study makes use of the Tsallis entropy, genetic programming (GP) and adaptive neuro-fuzzy inference system (ANFIS) methods to assess the shear stress distribution (SSD) in the rectangular channel. To evaluate the results of the Tsallis entropy, GP and ANFIS models, laboratory observations were used in which shear stress was measured using an optimized Preston tube. This is then used to measure the SSD in various aspect ratios in the rectangular channel. To investigate the shear stress percentage, 10 data series with a total of 112 different data for were used. The results of the sensitivity analysis show that the most influential parameter for the SSD in smooth rectangular channel is the dimensionless parameter B/H, Where the transverse coordinate is B, and the flow depth is H. With the parameters (b/B), (B/H) for the bed and (z/H), (B/H) for the wall as inputs, the modeling of the GP was better than the other one. Based on the analysis, it can be concluded that the use of GP and ANFIS algorithms is more effective in estimating shear stress in smooth rectangular channels than the Tsallis entropy-based equations.

Investigation of local and temporal interfacial shear stress distribution during membrane emulsification

2021 ◽  
Author(s):  
Tobias Wollborn ◽  
Patrick Giefer ◽  
Helena Kieserling ◽  
Anja Maria Wagemans ◽  
Stephan Drusch ◽  
...  
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Interfacial Shear Stress ◽  
Interfacial Shear ◽  
Shear Stress Distribution ◽  
Membrane Emulsification

scholarly journals Wall Shear Stress Distribution of Small Aneurysms Prone to Rupture

Stroke ◽  
2014 ◽  
Vol 45 (1) ◽  
pp. 261-264 ◽  
Author(s):  
Vitor Mendes Pereira ◽  
Olivier Brina ◽  
Philippe Bijlenga ◽  
Pierre Bouillot ◽  
Ana Paula Narata ◽  
...  
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Wall Shear Stress ◽  
Shear Stress Distribution ◽  
Wall Shear Stress Distribution ◽  
Wall Shear ◽  
Small Aneurysms
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