Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Detection of crack onset in double cleavage drilled specimens of plaster under compression by digital image correlation

Abstract : Geomaterials such as rocks and concrete are brittle or quasi-brittle materials. Tensile tests carried out to observe the initial phases of crack nucleation are dif ficult to achieve because of the unstable nature of the tests. Instead, compression tests on drilled specimens offer a greater stability. When subjected to a compressive loading, two opposite cracks take place and grow from the cavity, parallel to the load. This crack nucleation is experimentally studied in rectangular drilled specimens of plaster with a centred cylindrical hole which size is assumed to be small with respect to the dimensions of the specimen. The results are compared to a theoretical prediction of the crack onset derived from the coupled criterion of Leguillon. Due to the difficulty of determining the crack initiation directly by the naked eye, 2D Digital Image Correlation is used. The nucleation event is determined by analysing the history of deformations at some points where the crack is expected to start. The predictions are proving to be in good agreement with the experimental results.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-enpc.archives-ouvertes.fr/hal-01133590
Contributeur : Meca Docenpc <>
Soumis le : jeudi 19 mars 2015 - 16:53:42
Dernière modification le : vendredi 17 juillet 2020 - 17:09:10

Identifiants

Citation

R. Romani, Michel Bornert, Dominique Leguillon, Robert Le Roy, Karam Sab. Detection of crack onset in double cleavage drilled specimens of plaster under compression by digital image correlation . European Journal of Mechanics - A/Solids, Elsevier, 2015, 51, pp.172-182. ⟨10.1016/j.euromechsol.2014.12.002⟩. ⟨hal-01133590⟩

Partager

Métriques

Consultations de la notice

415