Aplicación del modelo de daño de Gurson-Tvergaard-Needleman (GTN) para la simulación del ensayo miniatura de punzonado sobre probetas prefisuradas

  1. Cuesta, I. I. 1
  2. Alegre, J. M. 1
  3. Barbáchano, H. 1
  1. 1 Departamento de Ingeniería Civil, Universidad de Burgos
Revue:
Revista de metalurgia

ISSN: 0034-8570

Année de publication: 2010

Volumen: 46

Número: 0

Pages: 53-63

Type: Article

DOI: 10.3989/REVMETALMADRID.05XIIPMS DIALNET GOOGLE SCHOLAR lock_openAccès ouvert editor

D'autres publications dans: Revista de metalurgia

Résumé

Small Punch Test (SPT) is a feasible alternative to determine the mechanical properties in those cases where there is not enough material for conducting conventional tests. Nowadays, there is a great interest in using this test on precracked specimens (P-SPT) in order to determine the fracture properties of the material, as well. In the case of ductile material behaviour, theGurson-Tvergaard-Needleman (GTN) damagemodel can be used, based on a set of constitutive parameters, to reproduce the material behaviour up to final fracture. These constitutive parameters take into account the nucleation, growth and coalescence of microvoids as mechanisms of damage evolution in ductile materials. The aim of this paper is to develop a methodology for the identification of these constitutive parameters, based on the numerical adjustment of the experimental results obtained from the P-SPT tests.

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