Levatti, Hector Ulises
Total activity: 11
Research group
MECMAT - Mechanics and Nanotechnology of Engineering Materials
E-mail
hector.levattiupc.edu
Contact details
UPC directory Open in new window

Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 11 of 11 results
  • Ground penetrating radar system for detection of desiccation cracks in soils

     Prat Catalan, Pere; Ledesma Villalba, Alberto; Cuadrado Cabello, Agustin; Levatti, Hector Ulises
    International Symposium on Computational Geomechanics
    Presentation's date: 2013-08-22
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    In this paper we explore a relatively simple, non-destructive, indirect technique using a ground penetrating radar (GPR) system to detect cracks that form and propagate inside a soil specimen during desiccation. Although GPR devices have been used for multiple applications, their use in the detection of small cracks (few millimeters wide), has not been demonstrated yet. The experiments and the methodology used to test the accuracy of a small commercial GPR device for crack identification are described. The main objective was to identify what type of signals and what crack width can be detected using the GPR device. The results indicate that cracks of one or two millimeters wide can be detected depending on its position and shape. On the other hand, sub-millimeter cracks are undetectable with the currently existing devices in the market. In spite of the limitations the GPR method can be useful to find time-related bounds of when the cracks appear, and to point at their location. Because the GPR systems are in constant evolution this technique could become a very versatile and convenient method to scan soils under different kinds of processes both in the laboratory and in the field.

  • FISURACION TRIDIMENSIONAL EN SUELOS DEBIDA A OSCILACIONES DE VARIABLES MEDIOAMBIENTALES

     Jacinto, Carlos Abel; Ledesma Villalba, Alberto; Levatti, Hector Ulises; Prat Catalan, Pere
    Participation in a competitive project

     Share

  • Desecación y deformación de suelos arcillosos

     Levatti, Hector Ulises; Ledesma Villalba, Alberto; Prat Catalan, Pere
    Congresso de Métodos Numéricos em Engenharia
    Presentation's date: 2009-06-30
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Numerical modelling of desiccation processes in clayey soils

     Levatti, Hector Ulises; Prat Catalan, Pere; Ledesma Villalba, Alberto
    International Symposium on Computational Geomechanics
    Presentation's date: 2009-04-30
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    Influence of cracking in the desiccation process of clay soils  Open access

     Levatti, Hector Ulises; Prat Catalan, Pere; Ledesma Villalba, Alberto
    International Conference on Computational Plasticity Fundamentals and Applications
    Presentation's date: 2009-09-03
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    It is well known that clayey soils undergoing desiccation tend to shrink and eventually crack. Analysis of the behaviour and influence of cracks in these types of soils is very important in several engineering fields such as mine tailing dams, long-term radioactive waste storage, impervious core of earth dams, and in any situation where clay is used as a barrier to fluid flow. Loss of humidity and cracking changes the permeability of such barriers that may no longer work properly and pose potentially high risks to property and lives. This paper presents an analysis of cracking during drying of soils using a computer code de-veloped within the framework of the finite element and finite differences methods. A study of the influence of crack initiation and propagation in the desiccation process is also undertaken, with a comparative analysis of the phenomenon both with and without crack generation that allows some preliminary conclusions about the desiccation problem. The computer code has been implemented within the MatLab environment. The formulation is based on the principles of the unsaturated soil mechanics and the mechanics of a continuum medium. The partial differential equations that govern the problem are solved using the finite element (Galerkin) method in space and the finite differences method, using the Crank-Nicholson scheme, in time. Further developments of the code will include fracture mechanics principles to simulate crack propagation.

  • Numerical modelling of desiccation proccesses in clayey soils

     Levatti, Hector Ulises; Prat Catalan, Pere; Ledesma Villalba, Alberto
    International Symposium on Computational Geomechanics
    Presentation's date: 2009-05-30
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Fracture mechanics for crack propagation in drying soils

     Prat Catalan, Pere; Ledesma Villalba, Alberto; Lakshmikantha, M. R.; Levatti, Hector Ulises; Tapia, J.
    International Conference of International Association for Computer Methods and Advances in Geomechanics
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Numerical modelling of formation and propagation of drying cracks in soils

     Levatti, Hector Ulises; Prat Catalan, Pere; Ledesma Villalba, Alberto
    International Conference on Computational Plasticity
    Presentation's date: 2007-09
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • ENVOSCRACK (CGL2006-09847) EFECTO DE LAS OSCILACIONES MEDIOAMBIENTALES EN LA FORMACIÓN DE GRIETAS EN SUELOS

     Prat Catalan, Pere; Ledesma Villalba, Alberto; Levatti, Hector Ulises
    Participation in a competitive project

     Share

  • 2005SGR-00842. Grup de Geotècnia i Mecànica de Materials

     Carol Vilarasau, Ignacio; Alonso Pérez de Agreda, Eduardo; Gens Sole, Antonio; Josa Garcia-tornel, Alejandro; Ledesma Villalba, Alberto; Lloret Morancho, Antonio; Olivella Pastalle, Sebastian; Prat Catalan, Pere; Romero Morales, Enrique Edgar; Chen, Guangjing; Lopez Garello, Carlos Maria; Caner, Ferhun Cem; Vaunat, Jean; Zhan, Zhifeng; Arnedo Gaute, Diego; Ciancio, Daniela; Garolera Vinent, Daniel; Idiart Castellano, Andrés Enrique; Jacinto, Abel Carlos; Levatti, Hector Ulises; Montenegro, Iván Óscar; Pineda, Jubert Edgar; Ortega Iturralde, Francisco; Pinyol Puigmarti, Nuria Merce; Samat Aon, Sergio Luis; Segura Serra, Josep Maria; Caballero Jurado, Antonio; Berdugo de Moya, Ivan Rafael; Di Mariano, Alessandra; Hoffmann Jauge, Christian; Muñoz, Juan Jorge; Oldecop, Luciano; Arroyo Alvarez de Toledo, Marcos
    Participation in a competitive project

     Share