Departament d'Enginyeria Mecànica: Envíos recientes
Mostrando ítems 41-60 de 88
Study and characterization of mechanical properties of wood-PLA composite (Timberfill) material parts built through fused filament fabrication
This research is based upon the additive manufacturing (AM) technology which aims to study the mechanical properties of innovative commercial wood-PLA composite material (Timberfill) and characterize its behavior. Specifically ...
Estudio del mecanizado asistido por vibración
The objective of this work is to analyze the influence of assisted vibration, VAM, in the process of turning steel. Initially, the surface finish generated in a lathe displacement is studied utilizing a geometric intersection ...
Optimization of interplanetari trajectories with gravity assist
Interplanetary travel is a difficult task due to the high fuel mass required to reach other planets. Minimizing the cost of the manoeuvres (and, in turn, the fuel mass) is the objective preliminary mission design. During ...
Microfluidic platform for multiple parameters readouts in a point-of-care
The research is motivated by real applications, such as pasteurization plant, water networks and autonomous system, which each of them require a specific control system to provide proper management able to take into account ...
Estabilización de suelos con bacterias Sporosarcina pasteurii
This thesis has been focused on optimizing the resistent capacity and reducing the permeability of fine and clay granular soils through the MICP (Microbiologically induced calcite precipitation). MICP is a natural biological ...
Study and characterisation of surface integrity modification after ultrasonic vibration-assisted ball burnishing
This dissertation is an experimental research project into the mechanical effects of the ultrasonic vibration-assisted ball burnishing process on the surface integrity of surfaces machined through ball-end milling. Due to ...
Estudio de la energía específica consumida en el rectificado
To contribute in the increase of the productivity and to the energetic saving in companies, the present thesis focuses the investigation on the process of grinding. The energetic efficiency grinding one depends on the ...
Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors
La present tesi doctoral s’ha centrat en el repte d’aconseguir, mitjançant Fabricació Additiva (FA), models per a assaig quirúrgic, sota la premissa que els equips per fer-los haurien de ser accessibles a l’àmbit hospitalari. ...
Application of dynamic vibration absorbers on double-deck circular railway tunnels to mitigate railway-induced ground-borne vibration
This dissertation is concerned with investigating the efficiency of dynamic vibration absorbers (DVAs) as measures to mitigate ground-borne vibrations induced by railway traffic in double-deck tunnels. The main topics of ...
An efficient methodology based on two-and-a-half-dimensional finite element and boundary element methods for ground-borne vibration radiated by underground railway tunnels and the re-radiated noise emitted inside them
This thesis presents a methodology for assessing induced ground-borne vibration due to Underground railway infrastructures in the context of an urban environment. The methodology is based on a comprehensive numerical ...
Contribució a la detecció de defectes singulars en els perfils de les rodes de ferrocarril mitjançant l’anàlisi de les vibracions generades en el contacte roda-carril
One of the main problems presented due to the defects in the profiles of the railway wheels is the generation of vibrations and noise, and their propagation towards the environment. Defects in wheels, such as surface pitting ...
Contribución a las tecnologías de fabricación aditiva para la obtención de piezas multimaterial, combinando la impresión 3D por máscara con la impresión funcional mediante sistemas InkJet
In recent decades, there has been a digitalization in all areas and faetones have not been been exempt from of this phenomenon, incorporating CAD I CAM I CAE systems, as well as automatas, robots, and real-time control ...
Contribución al desarrollo de una metodología de diseño para la fabricación con tecnologías aditivas de piezas con alta variabilidad de demanda
This thesis is the result of collaboration between the university (UPC) and the company (Fluidra SA) within the framework of the program of industrial doctorates of the agency AGAUR (Agencia de Gestión de Ayudas Universitarias ...
Contribución al estudio de la rugosidad superficial obtenida mediante el proceso de fresado en alta velocidad, en la fase de acabado, de aceros templados de moldes y matrices
The production of components of the moulds and dies sector is increasingly demanding. On the one hand, a better manufacturing quality is required, that requires, among other aspects, the improvement of the surface finish, ...
Aportació a l'estudi de la reducció de vibracions residuals en transitoris de moviment generats mitjançant accionaments de cinemàtica no lineal
Machines and mechanisms can usually exhibit a vibratory behavior during operation since they are formed by deformable solids of non-negligible mass and non-rigid joints. This oscillatory behavior can be shown for transient ...
Electroplastic cutting influence in machining processes
The thesis presented is performed with the aim of studying the effect of electropulses (EPs) in machining processes such as drilling and round turning processes for different materials. When the EPs of short duration are ...
Finite element simulation of the healthy and degenerated lumbar spine : interplay between muscle activity and intervertebral disc multiphysics
The human spine provides mechanical support to the trunk while it protects the spinal cord and nerves from the external loads transferred during daily activities. Such loads are largely controlled by the spine muscles and ...
Novel lubrication system to improve the excessive wear in wind turbine yaw and pitch gears
Manufacturers of wind turbines have observed a new phenomenon that appears in high power wind turbines: excessive wear in the teeth located at 0º in the pitch bearing. In order to design more efficient wind turbines, ...
Minimisation of the wire position uncertainties of the new CERN vacuum wire scanner
The particle production of an accelerator is characterised by the accelerated species of particles, by their number and energy. The particle rate is determined by the production cross section, a natural constant and the ...
Electropulsing to assist conventional manufacturing processes
This thesis presents a study on the variation of the mechanical properties of some materials. These variations are registered for processes as bottom bending, wire drawing or round turning, which are performed under high ...
