Application of optical methods to investigate the non-linear asymmetric behavior of ceramics exhibiting large strain to rupture by four-points bending test

Abstract : Large strain to rupture behavior is essential, for refractory materials, to improve their thermal shock resistance. The non-linear comportment under loading of specific developed ceramics associated to their type of microstructure (micro-cracked) leads to the possibility to increase their strain-to-rupture level. Aluminum titanate (AT: Al 2TiO 5) ceramics are one of these materials and are characterized by a mechanical behavior strongly dependent on their microstructure. Indeed, this behavior can vary from a fragile one to a large non-linear one according to the degree of microcracking present within the material. The paper here presented is devoted to the study of this nonlinear behavior thanks to four-points bending test associated with digital image correlation technique to determine kinematics fields. Results highlight the asymmetric character of the mechanical behavior of a microcracked aluminum titanate. A comparison between the Young moduli and fracture strength obtained using conventional and ones identified by digital image correlation will be done
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https://hal-unilim.archives-ouvertes.fr/hal-01102647
Contributeur : Thierry Chotard <>
Soumis le : mardi 13 janvier 2015 - 11:56:23
Dernière modification le : vendredi 27 septembre 2019 - 17:44:08

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Younès Belrhiti, A. Gallet-Doncieux, A. Germaneau, P. Doumalin, J.C. Dupre, et al.. Application of optical methods to investigate the non-linear asymmetric behavior of ceramics exhibiting large strain to rupture by four-points bending test. Journal of the European Ceramic Society, Elsevier, 2012, 32 (16), pp.4073-4081. ⟨10.1016/j.jeurceramsoc.2012.06.016⟩. ⟨hal-01102647⟩

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