A fracture model for pearlitic steel bars using a cohesive model

Suárez Guerra, Fernando and Gálvez Ruiz, Jaime and Cendón Franco, David Ángel and Atienza Riera, José Miguel and Elices Calafat, Manuel (2012). A fracture model for pearlitic steel bars using a cohesive model. In: "6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)", 10/09/2012 - 14/09/2012, Viena (Austria).

Description

Title: A fracture model for pearlitic steel bars using a cohesive model
Author/s:
  • Suárez Guerra, Fernando
  • Gálvez Ruiz, Jaime
  • Cendón Franco, David Ángel
  • Atienza Riera, José Miguel
  • Elices Calafat, Manuel
Item Type: Presentation at Congress or Conference (Article)
Event Title: 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)
Event Dates: 10/09/2012 - 14/09/2012
Event Location: Viena (Austria)
Title of Book: Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering
Date: 2012
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The fracture of ductile materials, such as metals, is usually explained with the theory of nucleation, growth and coalescence of microvoids. Based on this theory, many numerical models have been developed, with a special mention to Gurson-type models. These models simulate mathematically the physical growth of microvoids, leading to a progressive development of the internal damage that takes place during a tensile test. In these models, the damage starts to develop in very early stages of the test. Tests carried out by the authors suggest that, in the case of some eutectoid steels such as those used for manufacturing prestressing steel wires, the internal damage that takes place as a result of the growth of microvoids is only noticeable in very late stages of the tensile test. In the authors’ opinion, using a cohesive model as a failure criterion may be interesting in this case; a cohesive model only requires two parameters to be defined, with the fracture energy being one of them, which can be obtained experimentally. In addition to this, given that it is known that the stress triaxiality has a strong influence on the fracture of ductile materials, a cohesive model whose parameters are affected by the value of the stress triaxiality can be considered. This work presents a fracture model for steel specimens in a tensile test, based on a cohesive behaviour and taking into account the effect of stress triaxiality, which is different at each point of the fracture plane.

More information

Item ID: 20910
DC Identifier: http://oa.upm.es/20910/
OAI Identifier: oai:oa.upm.es:20910
Official URL: http://eccomas2012.conf.tuwien.ac.at/
Deposited by: Memoria Investigacion
Deposited on: 08 Jan 2014 08:58
Last Modified: 01 Jun 2018 12:51
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