Damage law identiﬁcation of a quasi brittle ceramic from a b ending test using digital image correlation
Université de Lyon, CNRS INSA-Lyon,
LaMCoS UMR 5259,
2 Université de Lyon, CNRS INSA-Lyon, MATEIS UMR 5510, 69621 Villeurbanne, France
3 Saint-Gobain, CREE, 550 av. Alfred Jauﬀret - BP 224, 84306 Cavaillon, France
a e-mail: firstname.lastname@example.org
The quasi brittle ceramics show a non linear mechanical behaviour resulting most of the time in a dissymetry between their tensile and compressive stress-strain laws. The characterization of their fracture strengths might be biased if elastic linear formulae are used to analyze classical tests like bending tests. Based on Digital Image Correlation (DIC), a methodology is proposed to characterize materials with dissymmetric behaviours. Applying speciﬁc DIC decomposition functions for bending, compressive and tensile tests, a stress-strain model and its damage law are identiﬁed for aluminium titanate, a damageable micro cracked ceramic. This identiﬁcation method using DIC can obviously be applied to other quasi brittle materials.
© Owned by the authors, published by EDP Sciences, 2010