An experimental study on the apparent viscosity of sandy soils: from liquefaction triggering to pseudo-plastic behaviour of liquefied sands

2021 ◽  
Author(s):  
Lucia Mele
Keyword(s):  
Experimental Study ◽  
Apparent Viscosity ◽  
Sandy Soils ◽  
Plastic Behaviour

03.13: Experimental study on cyclic plastic behaviour of steel joint components

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 599-608
Author(s):  
Viktor Budaházy ◽  
László Dunai
Keyword(s):  
Experimental Study ◽  
Cyclic Plastic ◽  
Steel Joint ◽  
Plastic Behaviour

scholarly journals Experimental study on fibre reinforced sandy soils behaviour under static loadings - drained and undrained conditions

2019 ◽  
Vol 92 ◽  
pp. 12002
Author(s):  
Jorge Hernán Flórez-Gálvez ◽  
Lucas Festugato ◽  
Nilo Cesar Consoli
Keyword(s):  
Experimental Study ◽  
Sandy Soils ◽  
Friction Angle ◽  
The Other ◽  
Triaxial Tests ◽  
Polypropylene Fibres ◽  
Undrained Conditions ◽  
Positive Effect ◽  
Drained And Undrained Conditions ◽  
Sustained Increase

The effect of the addition of 0.5% of randomly distributed polypropylene fibres in a round grained sand, composed mainly of silica, is presented on laboratory scale. The samples were compacted with two void ratios (0.75 and 0.63), corresponding to values of relative density of 50% and 90% respectively. 24 monotonic triaxial tests were performed, with initial effective mean pressures of 20, 100 and 200 kPa. Half of samples were tested in drained conditions, and the other half in undrained conditions. For the samples subjected to drained conditions, the effect of the fibres was identified at the post-failure stage, by showing sustained increase of strength. The positive effect of fibres could also be observed through the increase of material friction angle. In the samples subjected to undrained tests, the addition of fibres reduced the contractive behaviour, mainly for those more compacted.

scholarly journals Experimental Study and Modelling of the Thermal Conductivity of Sandy Soils of Different Porosities and Water Contents

2017 ◽  
Vol 7 (2) ◽  
pp. 119 ◽  
Author(s):  
Hua Jin ◽  
Yu Wang ◽  
Qiang Zheng ◽  
Hu Liu ◽  
Edmund Chadwick
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Sandy Soils ◽  
Water Contents

A Theoretical and Experimental Study of EHL Lubricated With Grease

1988 ◽  
Vol 110 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Shi Zhu Wen ◽  
Tsi Neng Ying
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Numerical Analysis ◽  
Film Thickness ◽  
Numerical Solution ◽  
Service Time ◽  
Apparent Viscosity ◽  
Rheological Parameters ◽  
Base Oil ◽  
Boundary Position

It is known that the apparent viscosity of grease varies with service time and that grease starvation is important in EHL. However, these effects were often ignored in the research of EHL lubricated with grease. This paper deals with the thixotropy of grease and determines which value of rheological parameters can be used in numerical analysis. The starved boundary position and its cause are also discussed and observed experimentally. A steady starved boundary of grease was adopted in computing the film shape. Since in both calculation and experiment the thixororpy and grease starvation were considered, the numerical solution was quite consistent with the experimental data. This paper explains why even though the apparent viscosity of grease is always larger than that of its base oil, the film thickness of EHL lubricated with grease is equal to or lower than that with the oil alone.

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