Departament d'Enginyeria Mecànica i de la Construcció Industrial: Envíos recientes
Mostrando ítems 21-40 de 81
Towards a high-performance computing finite element simulation framework for virtual testing of composite structures
his doctoral thesis aims at developing and implementing a computational framework for performing virtual testing of composite structures using a High-Performance Computing (HPC) environment. In this sense, this thesis ...
Micromechanical modelling of hybrid unidirectional composite materials under fibre tensile loading
In this thesis, a micromechanical model for predicting the tensile failure process in hybrid and non-hybrid unidirectional composite materials under fibre tensile loading is developed. Derived from this, the influence that ...
Improving compression after impact response of composite laminates through ply level hybridization with thin plies and unsymmetrical designs
Despite the weight savings, composite materials are vulnerable to impact loads mainly due to the alarming reduction in the compression after impact strength (CAI). This thesis exploits the potential of laminate designs ...
A mechano-perfusion bioreactor for tissue engineering
Tissue Engineering plays a vital role in tissue construct to repair, maintain or replace tissues. Those tissues can be cultivated in vivo or in vitro using devices such as bioreactors. There are several approaches to ...
Development and characterization of thermoelectric generators for thermal energy recovery from reciprocating internal combustion engines
Since the beginnings of the automotive driven with internal combustion engines all the cycles used in the alternative motors share a thermal characteristic, a large amount of heat released by the fuel is lost in the form ...
Contribution to bioabsorbable stent manufacture with additive manufacturing technologies
The main motivation of this work was to analyse the feasibility of the current stent’s manufacturing process to produce the new bioresorbable stents (BRS) as well as study new manufacturing methods. Fibre Laser Cutting ...
Development of efficient testing methods and cohesive zone models for analyzing fatigue-driven delamination in 3D laminated composite structures
The overall purpose of this Ph.D. thesis is to contribute to the reliable design of composite structures subjected to fatigue-driven delamination. The aim is motivated by a wish to reduce the amount of experimental testing ...
Contributions to ultrasonic micro-moulding process of high performance polymers
Polymeric materials, which are suitable for high performance applications for example human implants are one of the most expensive available polymers. Standard injection micromoulding process, dedicated for mass production, ...
Analysis and development of experimental characterization methodologies of mode II fracture toughness on CFRP bonded joints
Adhesives have been shown to be an excellent solution for joining fibre reinforced polymer (FRP) components thanks to their capacity to redistribute loads, reduces stress concentrations and contribute to overall weight ...
Development of efficient numerical models for the simulation of low velocity impact and compression after impact on composite structures
Fiber reinforced composite materials are nowadays used in several industrial applications that pursue structural weight reduction to reduce fuel consumption. The stiffness-to-weight and strength-to-weight ratios of composite ...
Electrically tunable thermal conductivity and exhaust heat recovery applications of thermoelectric materials
The current work is focused on two areas related to thermoelectricity: (i) the study of the capability of controlling the thermal conductivity of TEMs and (ii) the development, testing and improvement of an automotive ...
Response of composite laminates under out-of-plane loading
The objective of the thesis is to provide scaling tool predicting the response of composite structures under out-of-plane loading by testing small coupons. This global objective cannot be achieved without understanding the ...
Desarrollo de un modelo para el seguimiento y control económico y temporal durante la fase de ejecución en la obra pública. Integration of information for advanced detection of cost overruns-IMADO
The primary objective of this research is to modify the models regularly used to record and monitor the implementation costs of public works projects from the perspective of the promotor, the project directors or the project ...
Bond behavior of NSM FRP strips in concrete under sustained loading
The main objective of work has been to study the bond strength and bond-slip response of NSM CFRP strips in concrete when subjected to sustained loading under different environmental conditions. To this end, two experimental ...
Incremental sheet forming applied to the manufacturing of biocompatible polymer prostheses
Incremental Sheet Forming (ISF) technology has been mainly applied on metallic sheets during the last years. ISF is used due to its flexibility, low costs, low batch production, production of complex geometries and customized ...
Characterization of the translaminar cohesive law
When a fibre-reinforced composite laminate is subjected to traction or compression, it develops a relatively large Fracture Process Zone where material toughening mechanisms such as matrix cracking, ...
Desarrollo de modelos para el cálculo de uniones estructurales con adhesivos flexibles
The use of adhesive joints in industrial structural applications is currently growing. Nevertheless, the designing process is still a challenge for engineers because there is a lack of effective models to predict their ...
Advances in the modelling of thermoelectric energy harvesters in waste heat recovery applications
In this work, we investigate harvesting thermoelectric energy from wasted heat in fluid networks and propose a generic tool for the simulation and sizing of thermoelectric energy harvesters, that can be used in ...
Hygrothermal effects on CFRP: testing, analysis and structural optimization
In the common design and certification process, a large number of experimental tests, going from small specimens to the full structure, are performed. In these tests, the environmental conditions, especially temperature ...
Milling stability improvement through novel prediction and suppression techniques
Chatter is one of the major problems in today’s milling processes. Theoretical models to calculate stability lobes are used to predict and avoid chatter onset. However, current predictions are not accurate enough and ...
