| Titre : | The fracture toughness of a cordierite square lattice (2010) |
| Auteurs : | I. Quintana-Alonso, Auteur ; S.P. Mai, Auteur ; N.A. Fleck, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 1, Janvier 2010) |
| Article en page(s) : | pp. 201–207 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | 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 |
