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The effect of the medium‐range configuration on the atomistic fracture behaviour of vitreous silica
Author(s) -
Ebrahem Firaz,
Bamer Franz,
Markert Bernd
Publication year - 2018
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201800418
Subject(s) - silica glass , materials science , fracture (geology) , quenching (fluorescence) , statics , composite material , tension (geology) , deformation (meteorology) , molecular dynamics , range (aeronautics) , ring (chemistry) , chemical physics , optics , chemistry , computational chemistry , ultimate tensile strength , organic chemistry , physics , classical mechanics , fluorescence
Using molecular dynamics simulations, we prepare vitreous silica by quenching molten silica to ambient temperature. Varying the quenching rate, we show that the latter barely influences the short‐range order, whereas the medium‐range configuration is significantly affected. We subject the prepared silica specimens to tension until fracture occurs and demonstrate the effect on the material behaviour. We evaluate the medium‐range configuration in terms of the ring statics of the glass network structure. Linking the ring statistics with the deformation and fracture behaviour of vitreous silica, we provide a topologically motivated explanation of the material behaviour.