Dpto. Ingeniería Mecánica, Energética y de Materiales - Mekanika, Energetika eta Materialen Ingeniaritza Saila: Envíos recientes
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Control of discrete event systems by means of discrete optimization and disjunctive colored PNs: application to manufacturing facilities
Artificial intelligence methodologies, as the core of discrete control and decision support systems, have been extensively applied in the industrial production sector. The resulting tools produce excellent results in ... -
Modelización y análisis del proceso de forja de componentes mecánicos obtenidos a partir de material nanoestructurado
En esta Tesis Doctoral se aborda un estudio relativo a la viabilidad de obtener componentes mecánicos de estructura submicrométrica y/o nanométrica a partir de materiales previamente procesados mediante SPD por ECAE. Para ... -
Auxiliary consumption: a necessary energy that affects thermoelectric generation
Waste heat recovery can apply to a wide range of applications, from transportation, or industries to domestic appliances. Thermoelectric generation technology applied to those cases could produce electrical energy and thus ... -
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 ... -
Medios anisótropos transparentes: superficie indicatriz de reflectancia natural y su relación con las constantes ópticas del medio
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 1997) Tesis doctoral / Doktoretza tesiaEn este trabajo se contribuye al desarrollo en la caracterización de los medios biáxicos transparentes completando, además, la de los uniáxicos, todo ello bajo el concepto de la Superficie Indicatriz de Reflectancia ... -
Desarrollo de recubrimientos PVD cuaternarios de tipo nitruro, óxido y oxinitruro para aplicaciones de trabajo en caliente
La tesis consiste en una aportación en el campo de los recubrimientos PVD para aplicaciones en procesos de conformado y moldeo a alta temperatura. Para ello se ha abordado el estudio de una serie de familias de recubrimientos ... -
Effect of the temperature in the mechanical properties of austenite, ferrite and sigma phases of duplex stainless steels using hardness, microhardness and nanoindentation techniques
The aim of this work is to study the hardness of the ferrite, austenite and sigma phases of a UNS S32760 superduplex stainless steel submitted to different thermal treatments, thus leading to different percentages of the ... -
Analytical modelling of energy density and optimization of the EDM machining parameters of Inconel 600
In this present research work, a new modelling of energy density in EDM (Electrical Discharge Machining) is proposed. Energy density can be defined as the amount of energy needed to get a unit volume of material removed, ... -
CO2 emissions reduction and energy efficiency improvements in paper making drying process control by sensors
The drying process of paper has many production parameters that can influence both the energy consumed and the characteristics of paper produced. It was found that most of the previous studies conducted on this process ... -
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 ... -
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 ... -
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 and mechanical properties analysis of AA5083 ultrafine grained cams
This present research work deals with the development of ultrafine grained cams obtained from previously ECAP (Equal Channel Angular Pressing)-processed material and manufactured by isothermal forging. The design and the ... -
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 ... -
Analysis of fatigue and wear behaviour in ultrafine grained connecting rods
Over the last few years there has been an increasing interest in the study and development of processes that make it possible to obtain ultra-fine grained materials. Although there exists a large number of published works ... -
Net thermoelectric power generation improvement through heat transfer optimization
Thermoelectric generation contributes to obtain a more sustainable energetic system giving its potential to harvest waste heat and convert it into electric power. In the present study a computational optimal net generation ... -
Thermoelectric generators for waste heat harvesting: a computational and experimental approach
Waste heat generation has a widespread presence into daily applications, however, due to the low-temperature grade which presents, its exploitation with the most common technologies is complicated. Thermoelectricity ...