Now showing items 1-14 of 14

    • A fracture mechanics approach to develop high crash resistant microstructures by press hardening 

      Casellas Padró, Daniel; Frómeta Gutiérrez, David; Lara, Antoni; Molas Busquets, Sílvia; Jonsén, Par (2017)
      Master thesis / UPC Master thesis / Postgraduate master thesis / Doctoral thesis project / Doctoral thesis proposal
      Open Access
      Crashworthiness is a relevant engineering property for car parts. However it is not easy to measure at laboratory scale and complex impact tests have to be carried out to determine it. Crash re-sistance for high strength ...
    • Determination of the essential work of fracture at high strain rates 

      Frómeta Gutiérrez, David; Casellas Padró, Daniel; Jonsén, Par (2017)
      Conference report
      Open Access
      During the last decades, the use of ultra-high strength steel (UHSS) has increased as its favorable ratio between strength and mass allows the design of lighter body-in-white while maintaining passenger safety. Modeling ...
    • Efecto de la predeformación en el trabajo esencial de fractura en aceros AHSS y en acero convencional 

      Frómeta Gutiérrez, David (Universitat Politècnica de Catalunya, 2015-04)
      Master thesis
      Restricted access - author's decision
      La aparición de nuevos aceros como los aceros avanzados de alta resistencia (AHSS de su acrónimo en inglés, Advanced High Strength Steels), con límites elásticos mucho más grandes y que presentan menores valores de ductilidad, ...
    • Fatigue resistance of press hardened 22MnB5 steels 

      Parareda, Sergi; Casellas Padró, Daniel; Frómeta Gutiérrez, David; Lara, Antoni; Pujante Agudo, Jaume (2020-01-01)
      Article
      Restricted access - publisher's policy
      In press hardened steels, fatigue behaviour is very sensitive to surface defects or irregularities, either intrinsic or introduced during trimming operations. This work addresses the understanding and prediction of fatigue ...
    • Fracture mechanics based modelling of failure in advanced high strength steels 

      Jonsén, Par; Frómeta Gutiérrez, David; Casellas Padró, Daniel (2017)
      Conference report
      Open Access
      In the last decade, the favorable properties of the press hardening process for advanced high strength steel (AHSS) have increased the demands concerning passenger safety and lightweight design. AHSS show excellent mechanical ...
    • Fracture resistance of advanced high-strength steel sheets for automotive applications 

      Frómeta Gutiérrez, David; Lara, Antoni; Grifé, Laura; Dieudonné, Thomas; Dietsch, Pascal; Rehrl, Johannes; Suppan, Clemens; Casellas Padró, Daniel; Calvo Muñoz, Jessica (2021-01-03)
      Article
      Open Access
      The fracture resistance of different advanced high strength steel (AHSS) sheets for automotive applications is investigated through conventional tensile tests, fracture toughness measurements and hole expansion tests. ...
    • Fracture toughness measurements to understand local ductility of advanced high strength steels 

      Frómeta Gutiérrez, David (Institute of Physics (IOP), 2019-10-01)
      Article
      Open Access
      The determination of the material parameters that best predict the local ductility of high strength sheet materials has become the focus of active research. Even though several correlations have been proposed, they can ...
    • Fracture toughness to understand stretch-flangeability and edge cracking resistance in AHSS 

      Casellas Padró, Daniel; Lara, Antoni; Frómeta Gutiérrez, David; Gutierrez Castillo, David; Molas Busquets, Sílvia; Pérez Caro, Lluís; Rehrl, Johannes; Suppan, Clemens (2016-10-20)
      Article
      Open Access
      The edge fracture is considered as a high risk for automotive parts, especially for parts made of advanced high strength steels (AHSS). The limited ductility of AHSS makes them more sensitive to the edge damage. The ...
    • Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels 

      Frómeta Gutiérrez, David; Parareda, Sergi; Lara, Antoni; Molas Busquets, Sílvia; Casellas Padró, Daniel; Jonsén, P.; Calvo Muñoz, Jessica (2020-04-15)
      Article
      Restricted access - publisher's policy
      The fracture toughness of four advanced high strength steel (AHSS) thin sheets is evaluated through different characterization methodologies, with the aim of identifying the most relevant toughness parameters to describe ...
    • Journal of Physics: Conference Series 

      Calvo Muñoz, Jessica; Frómeta Gutiérrez, David; Molas Busquets, Sílvia; Casellas Padró, Daniel (Institute of Physics (IOP), 2017)
      Article
      Open Access
      Lightweight designs and demanding safety requirements in automotive industry are increasingly promoting the use of Advanced High Strength Steel (AHSS) sheets. Such steels present higher strength (above 800 MPa) but lower ...
    • Microstructural effects on fracture toughness of ultra-high strength dual phase sheet steels 

      Frómeta Gutiérrez, David; Cuadrado Lafoz, Nuria; Rehrl, Johannes; Suppan, Clemens; Dieudonné, Thomas; Dietsch, Pascal; Calvo Muñoz, Jessica; Casellas Padró, Daniel (2021-01-20)
      Article
      Open Access
      The influence of the microstructure on the fracture toughness of two industrially processed 1000 MPa dual-phase (DP) steel grades is investigated. Crack initiation and propagation resistance are evaluated by means of the ...
    • New tool to evaluate the fracture resistance of thin high strength metal sheets 

      Frómeta Gutiérrez, David; Lara, Antoni; Parareda Oriol, Sergi; Grifé, Laura; Casellas Padró, Daniel (Institute of Physics (IOP), 2020-11-19)
      Article
      Open Access
      Fracture toughness has become a key property to predict the fracture performance of high strength metal sheets (edge cracking resistance, crash failure behaviour, local formability, etc.). However, the measurement of the ...
    • On the correlation between fracture toughness and crash resistance of advanced high strength steels 

      Frómeta Gutiérrez, David; Lara, Antoni; Molas Busquets, Sílvia; Casellas Padró, Daniel; Rehrl, Johannes; Suppan, Clemens; Larour, Patrick; Calvo Muñoz, Jessica (2019-01-01)
      Article
      Restricted access - publisher's policy
      Automotive industry players have devoted large efforts to identify the material parameters governing the crash resistance of Advanced High Strength Steels (AHSS). Such knowledge is essential to improve impact performance ...
    • Projecte tècnic de les instal·lacions d'un centre de formació 

      Frómeta Gutiérrez, David (Universitat Politècnica de Catalunya, 2009-01)
      Master thesis (pre-Bologna period)
      Open Access
      Aquest projecte consisteix en el càlcul i disseny de les instal·lacions d’una llar d’infants. El projecte està centrat bàsicament en les següents instal·lacions: - Sanejament - Fontaneria - Electricitat - Protecció ...