Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"Hydro-mechanical"”.
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Investigation of hydro-mechanical particle flow through horizontal orifices
… of flow. The movement of particles induced both mechanically and hydraulically formed the basis of this dissertation in which selected granular materials were experimentally characterised. Specifically, the following were studied: the effect of orifice and particle size, changes in system …
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Coupled Hydro-Mechanical Modelling of Gas Migration in Saturated Bentonite
… gas migration process is accompanied by complex hydromechanical (HM) behaviors, such as gas breakthrough phenomenon, development of preferential pathways, build-up of water pressure and total stress, nearly saturated state after gas injection test, localized consolidation, water exchange between …
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Multi-Scale Thermo-Hydro-Mechanical Behavior of Saturated Earth Materials
… changes. Previous studies on the thermo-mechanical behavior of soils did not consider the effect of the temperature change rate on such behavior. Since it is widely accepted nowadays that soil behavior is rate-dependent, evaluating soil behavior under more realistic, transient temperature …
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Chemo-hydro-mechanical effects of CO2 storage on Italian reconstituted caprock
L'abstract è presente nell'allegato / the abstract is in the attachment
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Coupled thermo-hydro-mechanical behavior of glacial tills in shallow geothermal systems
… analysis to characterize the coupled thermo-hydro-mechanical behavior of glacial tills in central Illinois and suggest a constitutive model for describing their short- and long-term behavior. Four specimens of predominantly fine-grained glacial till were collected in the upper 20 m from a …
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Understanding plant water relations and root biomechanics for hydro-mechanical reinforcement of slopes
Vegetation stabilises slopes via both mechanical reinforcement (through root anchorage) and hydrologic reinforcement (through transpiration-induced soil matric suction). However, relatively little is known about the effectiveness of different plant species in stabilising soil slopes via the two …
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Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems
… is a three-dimensional, geology-based, geometric-mechanical, hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that it is based on statistical input representing fracture patterns in the field in form of the fracture intensity P₃₂ (fracture area …
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A THREE-DIMENSIONAL FULLY COUPLED HYDRO-MECHANICAL ELASTO-PLASTIC MODEL FOR UNSATURATED SOILS WITH CONSIDERATION OF HYSTERESIS BEHAVIOR
… and/or seasonal wetting-drying cycles. While mechanical hysteresis is a common feature of soils in general, hydraulic hysteresis is associated with unsaturated soils. Most existing constitutive models paid limited attention to the mechanical and hydraulic hysteresis behavior of unsaturated …
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THERMO-HYDRO-MECHANICAL NUMERICAL MODELLING TO ASSESS THE ROLE OF CLIMATIC FACTORS IN THE STABILITY OF ALPINE ROCK SLOPES
… process that includes geological and geomechanical characterization of rock slopes, the definition of a geological conceptual model, and the development of numerical stress-strain analysis, this work is intended to be a valid reference for the analysis of rock slope evolution in response …
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Experimental investigation on the effects of CO2 and acid exposure on the hydro-mechanical behaviour of a clayey caprock
L'abstract è presente nell'allegato / the abstract is in the attachment
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Design and Operation of a Rotatable Valve Cam to Improve the Efficiency of a Hydraulic Motor in an Inline Hydro-Mechanical Transmission
Traditional Hydro-mechanical transmissions (HMTs) split transmitted power between hydraulic and mechanical channels, which allows them to maintain continuously variable transmission ratios while achieving higher efficiency than hydrostatic transmissions. The Hondamatic inline HMT (iHMT) reduces the …
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Artificial Ground Freezing in sandy soils. Experimental and numerical analysis on the role of fine content on the thermo-hydro-mechanical behavior.
L'abstract è presente nell'allegato / the abstract is in the attachment
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From some obscurity to clarity in Boom clay behavior: Analysis of its coupled hydro-mechanical response in the presence of strain localization
… purpose, providing a state of knowledge on the hydro-mechanical behavior of Boom Clay, and validating a set of parameters which could realistically reproduce its response through the numerical modelings are firstly addressed as the requisites. Moreover, a special focus is made on the dilatation …
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Analysis and modeling of coupled thermo-hydro-mechanical phenomena in 3D fractured media = Análisis y modelización de fenómenos acoplados termo-hidro-mecánicos en medio fracturado
… work is devoted, more precisely, to near-field hydrogeological aspects involving mass and heat transport phenomena. The first part of the work is devoted to a specific data interpretation problem (pressures, relative humidities, temperatures) in a multi-barrier experimental system at the scale …
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Injection Induced Seismicity Modeling and Application to the Karapiti Reinjection Area, Wairakei, New Zealand
… of the complex interaction between thermo-hydro-mechanical behaviours and earthquake rupture process in injection induced earthquake areas with a coupled numerical model. The physics based numerical modelling specially designed for injection induced seismicity integrates fluid flow, heat …
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Knowledge-based approaches to fault diagnosis. The development, implementation, evaluation and comparison of knowledge-based systems, incorporating deep and shallow knowledge, to aid in the diagnosis of faults in complex hydro-mechanical devices.
… inspection and repair of a highly complex hydro-mechanical device. Additionally it is shown that a highly innovative modelbased system, named MIDAS, can be used to contribute to the provision of diagnostic, explanatory and training facilities for the same hydro-mechanical device. The …
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Evaluation and Assessment of Inflow Rates in Tunnels Excavated in Jointed Rock Mass
… Program which can take into account the coupled hydro-mechanical behavior within the rock fractures. The main concluding points of the study can be summarized as follows: (1) The hydro-mechanical behavior of the ring of tighter rock around the opening is similar to that of a semi-permeable liner, …
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Long-term ground response For borehole heat exchangers in clay
… applications require more careful evaluation of hydro-mechanical behavior of soil to understand the long-term ground response to seasonal cycles of heating and cooling and the impacts on adjacent structures. The goal of this thesis is to develop reliable methods for studying the coupled …
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Constitutive Modelling of Shear Localisation in Saturated Dilative Sand
… and open drainage boundaries. In both cases, the hydro-mechanical coupling decides both the onset and propagation of localisation. Depending on the local degree of drainage shear zones can be fully or partially drained. The normalised velocity at the boundary between localised and uniform …
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