Doppelringbiegeversuche an Glasplatten aus Kalk‐Natron‐Silikatglas bei erhöhten Temperaturen bis in den Transformationsbereich

Pourmoghaddam, Navid; Dittmann, Swantje; Schneider, Jens

doi:10.1002/cepa.641

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…In der Vergangenheit wurden bereits mehrere Studien [4][5][6][7][8][9][10] mit unterschiedlichen Ansätzen zur Vorbehandlung der Proben, Versuchsaufbauten und auch Analysen der Ergebnisse z. B. Bruchfestigkeit, Spannungsintensitätsfaktoren und Energiefreisetzungsrate, publiziert.…”

Section: Einführungunclassified

Hochtemperaturfestigkeit von geglühtem Kalk‐Natronsilicatglas

et al. 2022

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Bei der additiven Fertigung und beim thermischen Vorspannen von Glas ist dessen Festigkeit für den aufgrund des Herstell‐ bzw. Veredelungsprozesses relevanten Temperaturbereich nur wenig erforscht. Um die Auswirkungen unterschiedlicher Temperaturen auf die Festigkeit des Werkstoffs näher bestimmen zu können, wurde der Doppelringbiegeversuch nach EN 1288‐5 mit einer Universalprüfmaschine mit Ofen an Glasplatten von Raumtemperatur bis 550 °C durchgeführt. Vor der Prüfung wurden die Proben kontrolliert vorgeschädigt, gelagert und mit Wärme behandelt. Die Ergebnisse zeigen eine Zunahme der Bruchfestigkeit mit steigender Prüftemperatur. Der kritische Spannungsintensitätsfaktor und die kritische Energiefreisetzungsrate zeigen keine Temperaturabhängigkeit. High temperature strength of annealed soda‐lime silicate glass. In additive manufacturing and thermal toughening of glass, its strength has been little researched for the temperature range relevant due to the manufacturing or refining process. In order to be able to determine the effects of different temperatures on the strength of the material in more detail, the coaxial double ring test according to EN 1288‐5 was carried out on glass plates from room temperature to 550 °C using a universal testing machine with furnace. Prior to testing, the specimens were pre‐damaged in a controlled manner, stored and heat treated. The results show an increase in fracture strength with increasing test temperature. The critical stress intensity factor and the critical energy release rate show no temperature dependence.

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Hochtemperaturfestigkeit von geglühtem Kalk‐Natronsilicatglas

et al. 2022

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“…Knowledge of the glass strength at elevated temperatures thus plays a decisive role in controlling the cooling process. In the past, several studies [22,19,18,17,15,8,5] were performed with different approaches for pre-treatment of the specimens, test setups and also analyses of the results e.g. fracture strength, stress intensity factors and fracture surface energy.…”

Section: Introduction and Previous Researchmentioning

confidence: 99%

Experimental investigations on the fracture strength of soda‐lime silica glass at elevated temperatures

et al. 2021

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The surface strength of glass plays a significant role when dimensioning glass components in structural facades. Commonly soda‐lime silica glass is used as material in architectural glass design. Different environmental conditions for example the load rate, relative humidity, surface flaws etc., but also the ambient temperature can have a strong influence on the resulting surface strength. The relationship between temperature, especially elevated temperatures, and surface strength of soda‐lime silica glass has so far been rarely investigated. Therefore, this paper methodically presents an experimental test setup for the determination of bending strength at elevated temperatures as well as first results. To determine the bending tensile strength of soda‐lime silica glass as float glass, the double ring bending test was conducted on specimens with small test surfaces according to EN 1288‐5. The double ring bending tests were performed using a tensile fatigue testing machine with furnace on circular glass plates of soda‐lime silica glass in a temperature range from room temperature to 550 °C. Before testing, the specimens were first pre‐damaged (inducing crack with diamond), stored and heat treated as the final pre‐treatment step. To determine the load rate for the experiments at elevated temperatures, the experiment was simulated in advance for the various temperatures using the finite element method with consideration of structural relaxation. To account for the structural relaxation, the Narayanaswamy model was utilized.

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Doppelringbiegeversuche an Glasplatten aus Kalk‐Natron‐Silikatglas bei erhöhten Temperaturen bis in den Transformationsbereich

Cited by 2 publications

References 17 publications

Hochtemperaturfestigkeit von geglühtem Kalk‐Natronsilicatglas

Hochtemperaturfestigkeit von geglühtem Kalk‐Natronsilicatglas

Experimental investigations on the fracture strength of soda‐lime silica glass at elevated temperatures

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