Residual shear stress near ground surfaces

1996 ◽  
Vol 34 (7) ◽  
pp. 1101-1106 ◽  
Author(s):  
Y. Calik ◽  
J.T. Evans ◽  
B.A. Shaw
Keyword(s):  
Shear Stress ◽  
Residual Shear Stress

Fabrication of FSW Tool Pins Through Turning of H13 Tool Steel: A Comparative Analysis for Residual Stresses

2021 ◽  
pp. 1-16
Author(s):  
Ravi Butola ◽  
Ravi Pratap Singh ◽  
Naman Choudhary ◽  
K. K. S. Mer ◽  
Jitendra Bhaskar ◽  
...  
Keyword(s):  
Residual Stress ◽  
Shear Stress ◽  
Tool Steel ◽  
Compressive Residual Stress ◽  
Stress Measurement ◽  
Positive Impact ◽  
Cnc Machine Tools ◽  
Friction Stir ◽  
H13 Tool Steel ◽  
Residual Shear Stress

In the present research, measurement of residual stress induced during turning and threading operations for the fabrication of two types of pin profiled friction stir processing/welding (FSP/FSW) tools, i.e. cylindrical profiled pin tool and cylindrical threaded profiled pin tool, is being dealt with. Workpiece was chosen to be H13 tool steel with a diameter of 22[Formula: see text]mm and 110[Formula: see text]mm length. Turning and threading was done on CNC machine tools using CNMG 12404-THM uncoated tungsten carbide cutting tool. For residual stress measurement of the workpieces, an XRD-based Pulsetec[Formula: see text]-X360n portable residual stress analyzer setup was used. The experimental results show that the cylindrical pin profile tool had a compressive residual stress of [Formula: see text][Formula: see text]MPa and compressive residual shear stress of [Formula: see text][Formula: see text]MPa, while the cylindrical threaded pin profile tool had a compressive residual stress of [Formula: see text][Formula: see text]MPa (51.8% more) and compressive residual shear stress of [Formula: see text][Formula: see text]MPa (40% less). It has been concluded that due to threading operation on the cylindrical threaded pin profile, the value of residual stress is more in it, and since the stress is compressive in nature, it would have a better positive impact while doing FSP/FSW than that of the cylindrical profiled pin tool.

On the measurement of residual shear stress in scragged torsion bars

1978 ◽  
Vol 13 (3) ◽  
pp. 157-163 ◽  
Author(s):  
W A C Swift
Keyword(s):  
Shear Stress ◽  
Mean Stress ◽  
Removal Method ◽  
Layer Removal ◽  
Layer Removal Method ◽  
The Mean ◽  
Residual Shear Stress

The layer-removal method for determining the residual shear stress destribution in scragged torsion bars is examined. It is found that thickness of the layer removed is restricted if the ‘mean stress at mean radius’ assumption is to be valid. Also, it is shown that the modulus of rigidity used in the Fuchs-Mattson equation is not the conventionally accepted modulus, the use of which can lead to large errors in the calculation of the residual shear stress in the outer layers of material.

Fabrication of simulated plate fuel elements: Defining role of out-of-plane residual shear stress

2014 ◽  
Vol 445 (1-3) ◽  
pp. 200-208 ◽  
Author(s):  
R. Rakesh ◽  
D. Kohli ◽  
V.P. Sinha ◽  
G.J. Prasad ◽  
I. Samajdar
Keyword(s):  
Shear Stress ◽  
Out Of Plane ◽  
Fuel Elements ◽  
Residual Shear Stress

scholarly journals Numerical Analysis of Shear and Particle Crushing Characteristics in Ring Shear System Using the PFC2D

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 229
Author(s):  
Sueng-Won Jeong ◽  
Kabuyaya Kighuta ◽  
Dong-Eun Lee ◽  
Sung-Sik Park
Keyword(s):  
Shear Stress ◽  
Numerical Analysis ◽  
Normal Stress ◽  
Numerical Results ◽  
Particle Flow Code ◽  
Shear Stresses ◽  
Particle Crushing ◽  
Ring Shear ◽  
Peak Shear Stress ◽  
Residual Shear Stress

The shear and particle crushing characteristics of the failure plane (or shear surface) in catastrophic mass movements are examined with a ring shear apparatus, which is generally employed owing to its suitability for large deformations. Based on results of previous experiments on waste materials from abandoned mine deposits, we employed a simple numerical model based on ring shear testing using the particle flow code (PFC2D). We examined drainage, normal stress, and shear velocity dependent shear characteristics of landslide materials. For shear velocities of 0.1 and 100 mm/s and normal stress (NS) of 25 kPa, the numerical results are in good agreement with those obtained from experimental results. The difference between the experimental and numerical results of the residual shear stress was approximately 0.4 kPa for NS equal to 25 kPa and 0.9 kPa for NS equal to 100 kPa for both drained and undrained condition. In addition, we examined particle crushing effect during shearing using the frictional work concept in PFC. We calculated the work done by friction at both peak and residual shear stresses, and then used the results as crushing criteria in the numerical analysis. The frictional work at peak and the residual shear stresses was ranged from 303 kPa·s to 2579 kPa·s for given drainage and normal stress conditions. These results showed that clump particles were partially crushed at peak shear stress, and further particle crushing with respect to the production of finer in shearing was recorded at residual shear stress at the shearing plane.

scholarly journals Scaling ansatz for the jamming transition

2016 ◽  
Vol 113 (35) ◽  
pp. 9745-9750 ◽  
Author(s):  
Carl P. Goodrich ◽  
Andrea J. Liu ◽  
James P. Sethna
Keyword(s):  
Shear Stress ◽  
Compressive Strain ◽  
System Size ◽  
Renormalization Group Theory ◽  
Scaling Exponents ◽  
Jamming Transition ◽  
Potential Development ◽  
Residual Shear Stress ◽  
Theoretical Results ◽  
Insight Into

We propose a Widom-like scaling ansatz for the critical jamming transition. Our ansatz for the elastic energy shows that the scaling of the energy, compressive strain, shear strain, system size, pressure, shear stress, bulk modulus, and shear modulus are all related to each other via scaling relations, with only three independent scaling exponents. We extract the values of these exponents from already known numerical or theoretical results, and we numerically verify the resulting predictions of the scaling theory for the energy and residual shear stress. We also derive a scaling relation between pressure and residual shear stress that yields insight into why the shear and bulk moduli scale differently. Our theory shows that the jamming transition exhibits an emergent scale invariance, setting the stage for the potential development of a renormalization group theory for jamming.

scholarly journals REDUCTION OF RESIDUAL SHEAR STRESS IN THE LOADED CONTACT USING FRICTION HYSTERESIS

2016 ◽  
Vol 14 (2) ◽  
pp. 159 ◽  
Author(s):  
Adrian Kraft ◽  
Roman Pohrt
Keyword(s):  
Shear Stress ◽  
Normal Force ◽  
Shear Stresses ◽  
Tangential Contact ◽  
Absolute Value ◽  
Method Of Dimensionality Reduction ◽  
Final Stress ◽  
External Forces ◽  
Residual Shear Stress ◽  
Special Case

We investigate the tangential contact problem of a spherical indenter at constant normal force. When the indenter is subjected to tangential movement, frictional shear stresses arise at the interface and do not vanish when it is moved backwards. We study the evolution of shear stress when the indenter is moved back and forth at falling amplitude. The method of dimensionality reduction (MDR) is employed for obtaining the distribution of stick and slip zones as well as external forces and the final stress distribution. We find that the shear stress decreases. For the special case of linearly falling amplitude of the movement, we observe uniform peaks in the shear stress. The absolute value of the shear stress peaks is reduced best for a high number of back-and-forth-movements with slowly decreasing amplitude.

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