Browsing Dpto. Ingeniería Mecánica, Energética y de Materiales - Mekanika, Energetika eta Materialen Ingeniaritza Saila by Issue Date
Now showing items 21-40 of 84
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Adaptación de un motor de combustión interna alternativo de gasolina para su funcionamiento con hidrógeno como combustible. Aplicaciones energética y de automoción
En esta tesis doctoral se presentan los trabajos de investigación realizados recientemente en la Universidad Pública de Navarra sobre la conversión de motores de gasolina para su funcionamiento con hidrógeno, así como el ... -
A proposal of a constitutive description for aluminium alloys in both cold and hot working
The most important difficulties when the behaviour of a part that is subjected to external mechanical forces is simulated deal with the determination of both the material thermo-mechanical properties and its boundary ... -
Design, simulation and manufacturing of a connecting rod from ultra-fine grained material and isothermal forging
In this research work, a study on the mechanical properties of isothermal forging for connecting rods is made from previously ECAP (Equal Channel Angular Pressing)-processed AA1050 and AA5083 aluminium alloys. This severe ... -
Experimental modelling of critical damage obtained in Al-Mg and Al-Mn alloys for both annealed state and previously deformed by ECAP
Assessing the damage produced in plastic deformation processes permits the optimum manner to shape a material that could avoid any cracks from appearing. In this present research work, the absolute critical damage in ... -
Influencia de los procesos de obtención de la aleación de aluminio-silicio AA380 en las propiedades mecánicas y el comportamiento frente a corrosión: High Pressure Die Casting (HPDC) frente a Semi Solid Rheocasting (SSR)
El principal objetivo de esta tesis doctoral es estudiar la influencia de los procesos de fundición y conformado de las aleaciones Aluminio-Silicio en sus propiedades mecánicas y comportamiento frente a corrosión. Se ha ... -
Thermoelectric power generation optimization by thermal design means
One of the biggest challenges of the twenty‐first century is to satisfy the demand for electrical energy in an environmentally speaking clean way. Thus, it is very important to search for new alternative energy sources ... -
Computational simulation of scleral buckling surgery for rhegmatogenous retinal detachment: on the effect of the band size on the myopization
A finite element model (FE) of the eye including cornea, sclera, crystalline lens, and ciliary body was created to analyze the influence of the silicone encircling bandwidth and the tightness degree on the myopia induced ... -
Compound Petri nets and alternatives aggregation Petri nets: two formalisms for decision-making support
Decision-making in technological systems, such as communication networks, manufacturing facilities and supply chains, constitutes a common requirement able to lead companies galore to success or failure. This article ... -
On studying the interaction between different stent models and rabbit tracheal tissue: numerical, endoscopic and histological comparison
Stenting technique is employed worldwide for treating atherosclerotic vessel and tracheal stenosis. Both diseases can be treated by means of metallic stents which present advantages but are affected by the main problem of ... -
Experimental investigation of the applicability of a thermoelectric generator to recover waste heat from a combustion chamber
A thermoelectric generator prototype has been built; it produces 21.56 W of net power, the produced thermoelectric power minus the consumption of the auxiliary equipment, using an area of 0.25 m2 (approximately 100 W/m2). ... -
Nanomaterials for functional textiles and fibers
Nanoparticles are very interesting because of their surface properties, different from bulk materials. Such properties make possible to endow ordinary products with new functionalities. Their relatively low cost with ... -
Estudio y optimización de los sistemas de intercambio de calor en generación termoeléctrica aplicada al aprovechamiento del calor residual
La presente tesis doctoral estudia el aprovechamiento del calor residual mediante generación termoeléctrica para la obtención de potencia eléctrica generada gracias al efecto Seebeck. Dos son las aproximaciones empleadas, ... -
Desarrollo de nuevos procesos de fabricación de nanoestructuras para aplicaciones ópticas avanzadas basados en litografía por interferencia láser
En esta tesis doctoral se presentan varios procesos de fabricación de nanoestructuras periódicas mediante litografía por interferencia láser, desarrollados para diferentes aplicaciones. En la primera parte se muestra el ... -
Caracterización de fundiciones de grafito esferoidal y matriz ferrítica, resistentes al impacto a baja temperatura
El material elegido por los diseñadores de las turbinas eólicas para varios de sus componentes de gran tamaño es la fundición de grafito esferoidal denominada EN-GJS-400- 18-LT. Este tipo específico de fundición pertenece ... -
Desarrollo de procesos termoquímicos para el tratamiento simultáneo de envejecimiento y nitruración en plasma de aceros maraging
El trabajo de investigación que se describe en esta tesis persigue un objetivo fundamental, que es el desarrollo de procesos de nitruración en plasma activados por arco eléctrico, susceptibles de ser trasladados a escala ... -
Design, optimization, and mechanical property analysis of a submicrometric aluminium alloy connecting rod
Ultrafine grained materials have a great deal of both scientific and technological interest because they allow outstanding properties to be obtained. An improvement in the mechanical strength and in the ductility and a ... -
Mechanical properties analysis of an Al-Mg alloy connecting rod with submicrometric structure
Over these last few years, there has been a growing interest in developing mechanical components from submicrometric materials due to the significant improvement that these materials present compared to their original ... -
Comparative study of the damage attained with different specimens by FEM
This present research work deals with the analysis of the design of different specimen geometries so that by finite volume simulations, the appearance of cracks may be predicted in the case of forging processes. To this ... -
Design and optimization of the dies for the isothermal forging of a cam
In the present study, the design of the dies required for the isothermal forging of a cam is analysed by finite volume method. Specifically, cams are of great importance in automotive industry, where a lower weight and ... -
Coupled biomechanical response of the cornea assessed by non-contact tonometry. A simulation study
The mechanical response of the cornea subjected to a non-contact air-jet tonometry diagnostic test represents an interplay between its geometry, the corneal material behavior and the loading. The objective is to study ...