... reservoir characterization gas hydrate shear strength sediment deviator stress flow assurance tetrahydroguran solution hydrate-bearing sediment different hydrate saturation Experimental Study on Mechanical Properties of Clay Sediment Containing Tetrahydroguran Hydrate Shuyun Wang, Xiaobing Lu...

..., unloaded to 100kPa for OCR=4 and unloaded to 50kPa for OCR=8 in overconsolidation before shearing. In CIU-NC tests, deviator stresses of normally consolidated clayey silt were observed softening tendency with increasing dilatancy and lowcohesion after failure. Peak pore water pressures decreased under...

... plane; c[ (1 )( / )]p + ; is a parameter lying between 0 and 1; cp is current consolidation pressure; p is effective mean stress and q is deviatoric stress. Parameter controls the shape of yield surface, and the yield function reduces to that for modified Cam-clay model when 1 = . Fig. 1...

... distinctive in stress strain behaviors as shown in these figures and peak deviator stresses for TYPE B specimens were higher than those for TYPE A specimens. Stress and strain curves in Fig. 9 show the differences between TYPE A and TYPE B specimens in terms of peak deviator stress and of strain softening...

... a shell-typed unique curve because the mobilized stress ratio M* at the maximum deviator stress became smaller than the stress ratio M at the critical state by the stress induced anisotropy. The effective stress path of normally K0-consolidated aged clays during secondary consolidation were divided...

... AND ANALYSIS The deviator stress versus axial strain and the volumetric strain versus axial strain curves for Jiangjiun sand are shown in Fig. 4. The various soil dilation angles are shown in Fig. 5. Table 4 lists the soil friction angles and dilation angles of the different sands at low confining pressures...

... loading were used. Figure 3 shows the relation between deviator stress q and axial strain E a for samples failing in mode A. we 1 Schematic diagram of low temperature, high pressure tria testing apparatus vtial 423 I 3 6 9 12 15 Axial strain E a G-4 Methane hydrate Temperature:-30 Confining pressu Axial...

... strength, low relative density and low SPT-N values with high water contents. Therefore, the reclaimed soil would easily liquefied under earthquake loading. deviator stress effective stress settlement ratio different relative density pore water pressure relation resistance kpa different...

.... consolidation presswe marine clay stress-strain diagram consolidation pressure stress-strain behaviour deviator stress kpa strength lime stress-strain curve effective stress cementation failure envelope artificially axial strain upstream oil & gas envelope typical stress-strain diagram...

... relationship mechanical behavior tangent modulus hyperbolic model axial strain nonlinear hyperbolic model hydraulic sand fill method fine content specimen equation failure deviator stress deviator stress taiwan relative density nonlinear analysis Proceedings of the Sixth (1996) .lnte17UJlional...

...) the stress path in (σ v -σ h )/2 and τ vh space traces a locus With a constant angle of principal stress direction while the manner of wave action varied from pushing to pulling or from pulling to pushing waves. principal stress direction deviator stress orientation stress path vertical axis...

... performed in order to check the reproducibility of the specimen. Average values are taken for the strengths and the strains at failure. Fig.2 shows a typical deviator stress and axial strain relation for specimens (fabricated under a density of 11 kN/m 3 and cement 6%) for different confining pressures...

... and s,ome monotonic loading test data are. reported. Cyclic tests. have been conducted u,nder a. wide range of stress. conditions at a frequency of 0.1 Hz" similar to that caused by wave loading of offshore structures. The effects: of varying the cyclic stress levels, mean deviator stress levels...