Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture
Molecular dynamics simulations were used to evaluate the fracture strength of pre-stressed silica glass exposed to water molecules, with and without heating. The pre-stressed wet glasses had a strength enhancement of 5–7% in comparison to the original dry glasses. Heating the glasses while pre-stres...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Journal of Non-Crystalline Solids: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590159123000432 |
| _version_ | 1827920110662189056 |
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| author | Stephen H. Garofalini |
| author_facet | Stephen H. Garofalini |
| author_sort | Stephen H. Garofalini |
| collection | DOAJ |
| description | Molecular dynamics simulations were used to evaluate the fracture strength of pre-stressed silica glass exposed to water molecules, with and without heating. The pre-stressed wet glasses had a strength enhancement of 5–7% in comparison to the original dry glasses. Heating the glasses while pre-stressed with included water resulted in an even greater strength enhancement. The glasses with a higher concentration of structural defects in the dry glass have an expected lower dry-glass strength in comparison to the glass with fewer defects. However, the weaker dry glass shows a greater strength enhancement after pre-stressed water exposure caused by the increase in the silanol concentration in the more defective glass that offsets the otherwise weakened glass. Increased silanol concentration has been shown to increase the expansion of silica glass, creating an increased compressive stress on the pre-stressed-wet glass relaxed to original dimensions, allowing for an increased strength enhancement. |
| first_indexed | 2024-03-13T04:07:54Z |
| format | Article |
| id | doaj.art-f406570b8f894556af576c68aff33755 |
| institution | Directory Open Access Journal |
| issn | 2590-1591 |
| language | English |
| last_indexed | 2024-03-13T04:07:54Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Non-Crystalline Solids: X |
| spelling | doaj.art-f406570b8f894556af576c68aff337552023-06-21T06:59:50ZengElsevierJournal of Non-Crystalline Solids: X2590-15912023-06-0118100191Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moistureStephen H. Garofalini0Interfacial Molecular Science Laboratory, Department of Materials Science and Engineering, Rutgers University, USAMolecular dynamics simulations were used to evaluate the fracture strength of pre-stressed silica glass exposed to water molecules, with and without heating. The pre-stressed wet glasses had a strength enhancement of 5–7% in comparison to the original dry glasses. Heating the glasses while pre-stressed with included water resulted in an even greater strength enhancement. The glasses with a higher concentration of structural defects in the dry glass have an expected lower dry-glass strength in comparison to the glass with fewer defects. However, the weaker dry glass shows a greater strength enhancement after pre-stressed water exposure caused by the increase in the silanol concentration in the more defective glass that offsets the otherwise weakened glass. Increased silanol concentration has been shown to increase the expansion of silica glass, creating an increased compressive stress on the pre-stressed-wet glass relaxed to original dimensions, allowing for an increased strength enhancement.http://www.sciencedirect.com/science/article/pii/S2590159123000432SilicaWaterFractureSilanolsPre-stressing |
| spellingShingle | Stephen H. Garofalini Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture Journal of Non-Crystalline Solids: X Silica Water Fracture Silanols Pre-stressing |
| title | Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture |
| title_full | Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture |
| title_fullStr | Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture |
| title_full_unstemmed | Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture |
| title_short | Molecular simulations of the strength enhancement of pre-stressed silica glass upon exposure to moisture |
| title_sort | molecular simulations of the strength enhancement of pre stressed silica glass upon exposure to moisture |
| topic | Silica Water Fracture Silanols Pre-stressing |
| url | http://www.sciencedirect.com/science/article/pii/S2590159123000432 |
| work_keys_str_mv | AT stephenhgarofalini molecularsimulationsofthestrengthenhancementofprestressedsilicaglassuponexposuretomoisture |