[Le verre est-il fragile à toutes les échelles ?]
Bien que le verre de silice soit considéré comme l'archétype des matériaux fragiles, qui cassent sans se déformer, sa rupture s'accompagne de dissipation. Par l'examen post-mortem de surfaces de rupture, le suivi in situ de la progression d'une fissure de corrosion sous contrainte et la mesure de la profondeur de pénétration de l'eau dans le matériau pendant sa fissuration lente, nous montrons que le verre se comporte en fait de manière quasi fragile, avec une zone endommagée d'une dizaine de nanomètres qui se développe en pointe de fissure.
Although silicate glass is considered as the archetype of brittle materials, which break without deforming irreversibly, its fracture involves some dissipation. By examining the post-mortem fracture surfaces, by following in situ the progression of a stress corrosion crack and by measuring the depth of penetration of water in the material during slow fracture, we show that glass behaves in fact in a quasi-brittle manner, with a damaged zone of ∼10 nm developing ahead of the crack tip.
Mot clés : Corrosion sous contrainte, Rupture quasi fragile, Endommagement, Verre de silice
@article{CRPHYS_2014__15_6_527_0,
author = {\'Elisabeth Bouchaud},
title = {Is glass brittle at all scales?},
journal = {Comptes Rendus. Physique},
pages = {527--535},
publisher = {Elsevier},
volume = {15},
number = {6},
year = {2014},
doi = {10.1016/j.crhy.2014.06.002},
language = {en},
}
Élisabeth Bouchaud. Is glass brittle at all scales?. Comptes Rendus. Physique, Volume 15 (2014) no. 6, pp. 527-535. doi : 10.1016/j.crhy.2014.06.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2014.06.002/
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