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The fracture toughness of a cordierite square lattice / I. Quintana-Alonso in Acta materialia, Vol. 58 N° 1 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 201–207 Titre : The fracture toughness of a cordierite square lattice Type de document : texte imprimé Auteurs : I. Quintana-Alonso, Auteur ; S.P. Mai, Auteur ; N.A. Fleck, Auteur Année de publication : 2010 Article en page(s) : pp. 201–207 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Finite  element  analysis  Fracture  toughness  Lattice  materials  Ceramics  Toughness  test Résumé : A single-edge-notch bend test was developed for the measurement of fracture toughness of a ±45° square lattice made from an elastic-brittle solid. The finite element method was used to obtain the K-calibration for an orthotropic elastic solid, with elastic constants equal to that of the ±45° square lattice. Finite element simulations were also used to predict the fracture strength of the cracked lattice, with failure dictated by the tensile strength of the cell-wall material. The conditions for K-dominance and for failure by a net-section strength criterion of the specimen were thereby determined. A set of fracture tests on single-edge-notch bend specimens made from the ceramic cordierite validate the predictions. The measured fracture toughness of the cordierite lattices scales linearly with the stockiness of the lattice. DEWEY : 1359-6454 ISSN : 669 En ligne : http://www.sciencedirect.com/science/article/pii/S135964540900593X [article] The fracture toughness of a cordierite square lattice [texte imprimé] / I. Quintana-Alonso, Auteur ; S.P. Mai, Auteur ; N.A. Fleck, Auteur . - 2010 . - pp. 201–207. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 201–207 Mots-clés : Finite  element  analysis  Fracture  toughness  Lattice  materials  Ceramics  Toughness  test Résumé : A single-edge-notch bend test was developed for the measurement of fracture toughness of a ±45° square lattice made from an elastic-brittle solid. The finite element method was used to obtain the K-calibration for an orthotropic elastic solid, with elastic constants equal to that of the ±45° square lattice. Finite element simulations were also used to predict the fracture strength of the cracked lattice, with failure dictated by the tensile strength of the cell-wall material. The conditions for K-dominance and for failure by a net-section strength criterion of the specimen were thereby determined. A set of fracture tests on single-edge-notch bend specimens made from the ceramic cordierite validate the predictions. The measured fracture toughness of the cordierite lattices scales linearly with the stockiness of the lattice. DEWEY : 1359-6454 ISSN : 669 En ligne : http://www.sciencedirect.com/science/article/pii/S135964540900593X