Download PDF by Lance Roberts, Kirby Mellegard, Frank Hansen: Mechanical Behaviour of Salt VIII

By Lance Roberts, Kirby Mellegard, Frank Hansen

ISBN-10: 1138028401

ISBN-13: 9781138028401

The contributions in Mechanical habit of Salt VIII signify the continuity of technology, engineering and modeling in regards to the mechanical habit of salt. those papers proof relationships from microscopic dislocation constitution to modeling functions over kilometer dimensions, a succeed in of greater than ten orders of value. This variation is subdivided into the next topical areas:laboratory trying out, box purposes, boundaries, resolution caverns, constitutive types and modeling and simulation. The interrelationships among learn and purposes verify complicated experimental ideas, larger outlined actual techniques, and more suitable modeling. expanded via bourgeoning computational energy, the technological know-how of the mechanical habit of salt contributes to a rise in protection, potency, and economy.

Mechanical habit of Salt VIII appeals to a wide group concerned with salt study and perform and  presents views and instruments for today’s demanding situations of layout, research, and function considerations.

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Extra resources for Mechanical Behaviour of Salt VIII

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In particular, little is known regarding the effect of differential stress on the permeability through the interfaces between salt layers (Liang et al. 2007 and 2012). These interfaces can have different orientations with respect to the direction of maximum differential stress, so their response to differential stress can be expected to differ between geometries. Consequently, the permeability can change depending on various factors, such as bonding strength at the interface, flexure due to different strength at the two sides of the interface, and the anisotropic ductility of the various layers under shear.

This observation is of importance when exploring the use of repositories in bedded salt, which apparently is not a good seal for a fluid filled cavern. Further, the vertical interface sample showed an increase in permeability with increasing stress, the horizontal interface showed almost the same permeability value at the end of the experiments as at the start, and the oblique interface sample showed a decrease in permeability value with stress. In contrast to these differences in permeability evolution depending on the layer geometry, all samples showed the same change in volume with increasing stress/ strain, namely a reduction (Fig.

1 Rheological properties—creep tests The laboratory conventional triaxial tests (σ1 > σ2 = σ3) were conducted on rock salt samples collected from the three sites described in chapter 2. Cylindrical samples 42 mm × 84 mm and 65 mm × 130 mm in diameter and length, respectively, were used. The confining pressure σ2 was 5–10 MPa. In the case of triaxial compression tests, effective stress σef is equal to differential stress σ1 – σ2 and is expressed by the formula: 1 σ ef 1 ⎡(σ1 − σ 2 )2 + (σ 2 − σ3 )2 + (σ3 − σ1 )2 ⎤ 2 (1) ⎦ 2⎣ Effective strain is equal to axial strain: 1 ε ef 2 ⎡( ε1 − ε 2 )2 + ( ε 2 − ε3 )2 + ( ε3 − ε1 )2 ⎤ 2 ⎦ 3 ⎣ (2) Figure 3.

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Mechanical Behaviour of Salt VIII by Lance Roberts, Kirby Mellegard, Frank Hansen

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