How glass breaks -- Damage explains the difference between surface and fracture energies in amorphous silica
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866915765059321856 |
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| author | Molnár, Gergely Barthel, Etienne |
| author_facet | Molnár, Gergely Barthel, Etienne |
| contents | The difference between free surface energy and fracture toughness in amorphous silica is studied via multi-scale simulations. We combine the homogenization of a molecular dynamics fracture model with a phase-field approach to track and quantify the various energy contributions. We clearly separate free surface energy localized as potential energy on the surface and damage diffusion over a 16-23 A range around the crack path. The plastic contribution is negligible. These findings, which clarify brittle fracture mechanisms in amorphous materials, align with toughness measurements in silica. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_11817 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | How glass breaks -- Damage explains the difference between surface and fracture energies in amorphous silica Molnár, Gergely Barthel, Etienne Materials Science Soft Condensed Matter The difference between free surface energy and fracture toughness in amorphous silica is studied via multi-scale simulations. We combine the homogenization of a molecular dynamics fracture model with a phase-field approach to track and quantify the various energy contributions. We clearly separate free surface energy localized as potential energy on the surface and damage diffusion over a 16-23 A range around the crack path. The plastic contribution is negligible. These findings, which clarify brittle fracture mechanisms in amorphous materials, align with toughness measurements in silica. |
| title | How glass breaks -- Damage explains the difference between surface and fracture energies in amorphous silica |
| topic | Materials Science Soft Condensed Matter |
| url | https://arxiv.org/abs/2412.11817 |