Internal friction and energy dissipation during crack propagation in silicate glasses
- To obtain a deeper insight into the nature of energy dissipation during crack propagation, the internal friction of 13 borosilicate, aluminosilicate, soda-lime, and lead-containing glasses, for which inert crack growth data are available in the literature, was measured using dynamic mechanical thermal analysis. For asymmetrically bent glass beams, the loss tangent tanδ was determined between 0.2 and 50 Hz at temperatures between 273 K and the glass transition temperature Tg. It was found that the area under the tanδ vs. T/Tg curve correlates with the crack growth exponent, n, in the empirical v ~ KIn relation between crack growth velocity, v, and stress intensity, KI. This correlation was most distinct for T/Tg < 0.3, still clear for T/Tg < 0.5, but not found for T/Tg > 0.8. The observed results indicate that n correlates with the degree of energy dissipation of relaxation phenomena below Tg.
| Autor*innen: | Tina Waurischk |
|---|---|
| Koautor*innen: | Joachim Deubener, Ralf Müller |
| Dokumenttyp: | Posterpräsentation |
| Veröffentlichungsform: | Präsentation |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2025 |
| Organisationseinheit der BAM: | 5 Werkstofftechnik |
| 5 Werkstofftechnik / 5.6 Glas | |
| DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
| Freie Schlagwörter: | Crack propagation; Energy dissipation; Internal friction; Silicate glasses |
| Themenfelder/Aktivitätsfelder der BAM: | Material |
| Material / Materialdesign | |
| Veranstaltung: | 27th International Congress on Glass 2025 |
| Veranstaltungsort: | Kolkata, India |
| Beginndatum der Veranstaltung: | 20.01.2025 |
| Enddatum der Veranstaltung: | 24.01.2025 |
| Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
| Datum der Freischaltung: | 30.07.2025 |
| Referierte Publikation: | Nein |

