Strain-Stress Relations and Failure of Anisotropic Clays

An unconsolidated undrained (UU) test is one type of triaxial compression tests based on the nature of loading and drainage conditions. In order to imitate the UU triaxial compression tests, a UU triaxial emulator with a graphical user interface (GUI) was developed. It has 5 deformation sensors (4 radial deformations and one vertical deformation) and one axial pressure sensor. In addition, other inputs of the emulator are the cell pressure, the height of sample, and the diameter of sample, which are provided by the user. The emulator also facilitates the analysis and storage of measurement data. Deformation data fed to the emulator were obtained from real measurements [H. Nawir, Viscous effects on yielding characteristics of sand in triaxial compression, Dissertation, Civil Eng. Dept., The University of Tokyo, 2002]. Using the measurement data, the stress vs radial strain, stress vs vertical strain, and Mohr-Coulomb circle curves were obtained and displayed by the emulator.

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Measurement of Unloading Pore Volume Compressibility of Frio Sand Under Uniaxial Strain Stress Path and Implications on Reservoir Pressure Management

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-021-02571-3 ◽

2021 ◽

Author(s):

Xiaojin Zheng ◽

D. Nicolas Espinoza

Keyword(s):

Pore Volume ◽

Stress Path ◽

Uniaxial Strain ◽

Reservoir Pressure ◽

Pressure Management ◽

Volume Compressibility ◽

Pore Volume Compressibility ◽

Strain Stress

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Strain-stress relationship and dislocation evolution of W–Cu bilayers from a constructed n-body W–Cu potential

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/ab1a8a ◽

2019 ◽

Vol 31 (30) ◽

pp. 305002 ◽

Cited By ~ 8

Author(s):

W Wei ◽

L Chen ◽

H R Gong ◽

J L Fan

Keyword(s):

Strain Stress

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Optimization of a Weld Overlay on a Plate Structure

Journal of Pressure Vessel Technology ◽

10.1115/1.4000511 ◽

2009 ◽

Vol 132 (1) ◽

Cited By ~ 1

Author(s):

John Goldak ◽

Mahyar Asadi ◽

Jianguo Zhou ◽

Stanislav Tchernov ◽

Dan Downey

Keyword(s):

Welding Process ◽

Francis Turbine ◽

Transient Temperature ◽

Weld Repair ◽

Weld Overlay ◽

Hydroelectric Project ◽

Repair Procedure ◽

Strain Stress ◽

Welding Direction ◽

Interpass Temperature

An overlay weld repair procedure on a 1066.8×1066.8 mm2 square plate 25.4 mm thick was simulated to compute the 3D transient temperature, microstructure, strain, stress, and displacement of the overlay weld repair procedure. The application for the overlay was the repair of cavitation erosion damage on a large Francis turbine used in a hydroelectric project. The overlay weld consisted of a 4×6 pattern of 100×100 mm2 squares. Each square was covered by 15 weld passes. Each weld pass was 100 mm long. The total length of weld in the six squares was 36 m. The welds in each square were oriented either front-to-back or left-to-right. The welding process was shielded metal arc. The analysis shows that alternating the welding direction in each square produces the least distortion. A delay time of 950 s between the end of one weld pass and the start of the next weld pass was imposed to meet the requirement of a maximum interpass temperature to 50°C.

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