Programa de Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica: Recent submissions
Now showing items 21-40 of 106
Contribution to the manufacture of porous structures for prostheses by means of additive manufacturing extrusion processes
(English) In recent years, the use of prostheses has widely increased due to their ability to replace defective parts of the skeleton. Among artificial implants, hip joint plays a critical role in the human body since it ...
Drive systems optimization in electric, hybrid and fuel cell vehicles
(English) We are currently immersed in the fourth industrial revolution that involves, among others, technology to prevent climate change, transformation of the transport sector, digitization and artificial intelligence. ...
On the prediction of induced structural damage in hydraulic turbines in off-design conditions
(English) The introduction of the intermittent and unpredictable solar and wind power into the electrical grid is pushing hydraulic turbines to work for longer periods of time in off-design conditions. Under these ...
Hemp crop waste for green solutions in construction: physical and mechanical characterization
(English) The primary goal of this thesis is to unlock the potential of hemp stalk, an agricultural byproduct that currently lacks practical applications. The overarching aim is to promote the use of eco-friendly materials, ...
Fractal approach to wheel-rail roughness contact theory
(English) In this study, the Weierstrass fractal function was used to model the surface roughness of railway tracks and, subsequently, the static coefficient of friction (COF) for Hertzian rail-wheel contact and cylinder-plane ...
Machine-learning to promote better practices of low-cost wearable devices in tremor diseases
(English) The most common tremor disorders worldwide are Parkinson's Disease and Essential Tremor. The gold standard for diagnosing these movement disorders is medical evaluation by neurologists, but its accuracy depends ...
Application of the vibration-assisted ball burnishing process on rotational symmetric parts to improve their fatigue strength and wear properties
(English) This thesis is an experimental investigation into the beneficial effects of the ultrasonic vibration-assisted ball burnishing process on the wear resistance and fatigue life-cycle enhancement of rotational symmetric ...
Active flow control optimization on Selig Donovan 7003 airfoil
(English) The PhD focuses on the study of the flow around an airfoil at different Angles of Attack (AoA) with and without the implementation of Active Flow Control (AFC), while maintaining the Reynolds number constant at ...
Tool-part tribological interaction assessment for continuous deformation processes
(English This dissertation is an experimental assessment of the tool-part tribological interaction of continuous deformation processes: ball burnishing as a superfinishing process and wire drawing as a bulk deformation ...
Parametrització d'una bomba d'engranatges externs i validació en condicions reals
(English) Pumps of positive volumetric displacement (PDVP) drive a volume of fluid from suction to discharge for each revolution of its shaft, called derived capacity, and therefore, in an ideal constant capacity pump the ...
Study of the characterization of the mechanical properties of materials with elastomeric behavior for biomedical applications
(English) The mechanical characterization of new materials used in the Material Extrusion technique (MEX) in 3D printing is essential. The use of this technique is growing and with it the possible applications of printed ...
Study of the flow around a square cylinder with an upstream splitter plate
(English) This PhD mostly focuses in studding the flow around a square cylinder with an upstream splitter plate and considering different velocity ratios between the upper and lower inlet velocities. The PhD is based in ...
Anàlisi del comportament de bigues de formigó armat reforçades amb FRCM vegetal sota càrregues de flexió cíclica
(English) Fiber-Reinforced Cementitious Matrix (FRCM) is a strengthening method that has been increasing its importance versus Fiber-Reinforced Polymer (FRP) due the lower cost and lower toxicity of its materials. The ...
A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration: design, optimization, and applications
Electromagnetic vibration energy harvesting is a relatively modern technology that has received relevant attention in the last decade from the research community and industry as a potential complement or alternative to the ...
Advanced 2.5D meshless methodologies to deal with soil-structure interaction problems in elastodynamics
This thesis is concerned with the development of efficient and practical numerical methodologies to deal with longitudinally invariant soil-structure interaction problems in elastodynamics. All the approaches appearing in ...
Solving the nearest rotation matrix problem in three and four dimensions with applications in robotics
Since the map from quaternions to rotation matrices is a 2-to-1 covering map, this map cannot be smoothly inverted. As a consequence, it is sometimes erroneously assumed that all inversions should necessarily contain ...
Estudio del coeficiente de rigidez y de amortiguación de una suspensión neumática multicámara
Heavy vehicles are generally equipped with Shock Absorber Suspension Cylinders, which, in addition to integrating in the same element, the damping and suspension mechanism, allow obtaining greater suspension travels, ...
Active control of noise transmitted from barriers
Active noise cancellation is a unique approach that helps passive noise control in reducing sound levels at low frequencies; nevertheless, successful use of active noise cancellation necessitates performing numerous and ...
A new computational approach to topology optimization in solid mechanics problems
This doctoral thesis addresses topology optimization problems at a single scale. Based on this purpose, a new topology optimization approach is developed in order to improve existing and widespread techniques in the research ...
Specific energy consumption of metal cutting with thin abrasive discs
The aim of this research is to provide an in-depth understanding of energy consumption in abrasive disc cutting processes. The specific energy consumed in cutting is measured,analysed, and then characterised in to three ...
