Numerical simulations of clay tiles compression

Abstract : During the pressing step, the clay tiles undergo stresses which result in the appearance of defects. A rheological study, based on free compression tests, allowed to confirm the Elasto-visco-plastic behaviour of the clay. The different constitutive parameters were estimated by fitting the force-displacement experimental curves using the optimisation algorithm (ES Metamodel) implanted in the commercial software Forge 2009 (R). The influence of the tribological parameters was studied using squeezing numerical simulations of a full tile. The numerical model was validated with experimental squeezing test of technological specimen with a tile lug. Then, we have compared experimental force with the numerical one and deduced that the clay/tool interface is not perfectly sliding. A friction Tresca's law was used to model the clay/tool interface. Numerical results showed that the actual geometry of tile lug didn't allow to form correctly the tile. Several areas undergo tensile stress, air traps,. .. A new geometry of tile lug was proposed in order to limit this phenomenon. Using a simplified defect criteria (Latham and Cockroft), the numerical model allowed to locate the areas where there is a risk of crack.
Type de document :
Communication dans un congrès
Merklein, M and Hagenah, H. ESAFORM 2012 - 15th International ESAFORM Conference on material forming, Mar 2012, Erlangen, Germany. 504-506, pp.1403-1408, 2012, Key Engineering Materials. 〈10.4028/www.scientific.net/KEM.504-506.1403〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01687321
Contributeur : Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : jeudi 18 janvier 2018 - 12:41:23
Dernière modification le : vendredi 21 septembre 2018 - 14:08:04

Identifiants

Collections

Citation

Jeremie Vignes, Fabrice Schmidt, Gilles Dusserre, Olivier De Almeida, Jean Frederic Dalmasso. Numerical simulations of clay tiles compression. Merklein, M and Hagenah, H. ESAFORM 2012 - 15th International ESAFORM Conference on material forming, Mar 2012, Erlangen, Germany. 504-506, pp.1403-1408, 2012, Key Engineering Materials. 〈10.4028/www.scientific.net/KEM.504-506.1403〉. 〈hal-01687321〉

Partager

Métriques

Consultations de la notice

44