scholarly journals Change of Small Strain Quasi-Elastic Deformation Properties During Undrained Cyclic Torsional Shear and Triaxial Tests of Toyoura Sand

2000 ◽  
Vol 40 (3) ◽  
pp. 101-110 ◽  
Author(s):  
Junichi Koseki ◽  
Sadahiro Kawakami ◽  
Hiroshi Nagayama ◽  
Takeshi Sato
Keyword(s):  
Elastic Deformation ◽  
Small Strain ◽  
Triaxial Tests ◽  
Torsional Shear ◽  
Deformation Properties ◽  
Toyoura Sand

Interpretation and modelling of deformation characteristics of a stiff North Sea clay

2006 ◽  
Vol 43 (4) ◽  
pp. 341-354 ◽  
Author(s):  
Vojkan Jovičić ◽  
Matthew Coop ◽  
Brian Simpson
Keyword(s):  
North Sea ◽  
Small Strain ◽  
Triaxial Tests ◽  
Simple Assumption ◽  
Stiff Clays ◽  
Class A ◽  
Numerical Predictions ◽  
Deformation Properties ◽  
London Clay ◽  
Soil Behaviour

An investigation into the behaviour of North Sea glaciomarine clays was carried out in which triaxial tests were conducted on both natural and reconstituted samples to assess the effects of structure. Although the tests were conventional CID tests, high quality instrumentation was used. The tests were also technically difficult both because of the very long test durations and because some of the samples were swelled back to very low effective stresses so that the effect of swelling on the influence of structure on the soil behaviour could be assessed. A "Class A" prediction of the behaviour in these tests was carried out using the BRICK model. Although the model is not designed to account for the influence of structure, it was found that its effects could be simulated by allowing the soil to have artificially high overconsolidation ratios (OCRs) so that the high undrained shear strengths resulting from structure could be modelled. Making the simple assumption that the decay of stiffness could be scaled from that of London Clay, reasonable predictions of the behaviour were made. The discrepancies between the predictions and the measured behaviour became significant only at the lowest stresses, where structure dominates the behaviour of the natural soil.Key words: laboratory testing, small strain stiffness, stiff clays, structure of soil, numerical predictions, shear deformation properties.

Capillary Force Induced Elastic Deformation on ZnS Nanobeams

2011 ◽  
Author(s):  
Xinnan Wang ◽  
Xiaodong Li
Keyword(s):  
Electron Microscope ◽  
Surface Energy ◽  
Total Energy ◽  
Elastic Deformation ◽  
Capillary Force ◽  
Elastic Beam ◽  
Small Strain ◽  
Beam Deflection ◽  
Atomic Force ◽  
Transmission Electron

In this study, synthesized Wurtzite-structured ZnS nanobelts was investigated using high resolution transmission electron microscope, atomic force microscope, and scanning electron microscope for structural and morphology analyses. Results show that ZnS nanobelts are tens of microns in length, mostly ∼40×50 nm2 in width and thickness. The nanobelts grow along direction [001] and are dislocation free. The distance spacing for (001) plane is 3.19A˚. The capillary force was found strong enough to deform the ZnS nanobeam down to the substrate. Theoretical analysis on small strain elastic deformation was conducted. It was found that as the maximum beam deflection increases, beam elastic energy increases; in the meantime, the surface energy decreases. The net increase in elastic beam energy is less than the net decrease in the surface energy, resulting in total energy decrease. In addition, as the volume of liquid increases, for a certain maximum beam deflection, the total energy increases, this is result of the increase of the surface energy. Furthermore, for a specific nanobeam to be deflected to the underlying surface, the amount of liquid can be calculated.

Elastic deformation properties of sands containing fines during liquefaction

2018 ◽  
pp. 121-132
Author(s):  
J. Koseki ◽  
T. Sato ◽  
N. Maeshiro ◽  
I. Urano
Keyword(s):  
Elastic Deformation ◽  
Deformation Properties
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