Browsing Programa de Doctorat en Anàlisi Estructural by Subject "531/534"

A compressible Lagrangian framework for the simulation of underwater implosion problems

Kamram, Kazem (Date of defense: 2013-06-21)

The development of efficient algorithms to understand implosion dynamics presents a number of challenges. The foremost challenge is to efficiently represent the coupled compressible fluid dynamics of internal air and ...

Applications of turbulence modeling in civil engineering

Cotela Dalmau, Jordi (Date of defense: 2016-01-15)

This thesis explores the use of stabilized finite element formulations for the incompressible Navier-Stokes equations to simulate turbulent flow problems. Turbulence is a challenging problem due to its complex and dynamic ...

Computational multiscale modeling of fracture and its model order reduction

Caicedo Silva, Manuel Alejandro (Date of defense: 2017-02-24)

This thesis focuses on the numerical modeling of fracture and its propagation in heterogeneous materials by means of hierarchical multiscale models based on the FE2 method, addressing at the same time, the problem of the ...

Discrete volume method : a variational approach for brittle fracture

Cardoso Nungaray, Víctor Eduardo (Date of defense: 2018-04-27)

This thesis presents a proposal to simulate mechanics and dynamics of brittle fracture. A variational formulation is used to describe Lagrangian mechanics, by minimizing the difference between potential and kinetic energy ...

Efficient computational mesoscale modeling of concrete under cyclic loading

Titscher, Thomas (Date of defense: 2019-09-27)

Concrete is a complex material and can be modeled on various spatial and temporal scales. While simulations on coarse scales are practical for engineering applications, a deeper understanding of the material is gained on ...

Elementos estabilizados de bajo orden en mecánica de sólidos

Valverde Guzmán, Quino Martín (Date of defense: 2002-12-09)

Se proponen nuevos elementos finitos para problemas en mecánica de sólidos en el marco de una formulación estabilizada novedosa en este ámbito. Esta formulación se basa en el método de las sub-escalas, y particularmente ...

Estudio constitutivo de materiales compuestos laminados sometidos a cargas cíclicas

Mayugo Majó, Joan Andreu (Date of defense: 2003-09-22)

La tesis propone una metodología para el análisis de la degradación a fatiga que produce la aplicación de cargas cíclicas en un composite laminado de fibras largas.<br/>En primer lugar se han estudiado los mecanismos de ...

Evaluación del daño por impacto en laminados de material compuesto mediante la respuesta dinámica

Pérez Martínez, M. (Marco) (Date of defense: 2012-02-06)

Composite laminates offer decisive advantages compared to more traditional materials, especially in structural applications where weight is a design-limiting factor. However, they have also shown a susceptibility to impact ...

Mixed finite element formulations for strain localization and failure in plasticity

Benedetti, Lorenzo (Date of defense: 2017-05-11)

Strain localization and quasi-brittle failure in frictional-cohesive materials is still an open and challenging problem in computational mechanics. Owing to its complexity and the significant implications on numerous ...

Multi-scale topological design of structural materials : an integrated approach

Ferrer Ferré, Àlex (Date of defense: 2017-05-26)

The present dissertation aims at addressing multiscale topology optimization problems. For this purpose, the concept of topology derivative in conjunction with the computational homogenization method is considered. In ...

Numerical modeling of metal cutting processes using the Particle Finite Element Method

Rodríguez Prieto, Juan Manuel (Date of defense: 2014-03-06)

Metal cutting or machining is a process in which a thin layer or metal, the chip, is removed by a wedge-shaped tool from a large body. Cutting is a complex physical phenomena in which friction, adiabatic shear bands, ...

Numerical modelling of viscoelastic flows based on a log-conformation formulation

Moreno Martínez, Laura (Date of defense: 2021-09-22)

Viscoelastic fluids are a type of non-Newtonian fluids which are formed by complex internal structures and high-molecular-weight, whose typical examples are the polymer solutions and molten polymers. Also, the viscoleastic ...

Numerical simulation of aeroacoustics using the variational multiscale method : application to the problem of human phonation

Pont Ribas, Arnau (Date of defense: 2018-02-23)

The solution of the human phonation problem applying computational mechanics is covered by several research branches, such as Computational Fluid Dynamics (CFD), biomechanics or acoustics, among others. In the present ...