Extending the Field of Application of Structural Glass Design Concepts

Haldimann, M.; Hirt, M. A.

doi:10.2749/222137806796169056

Cited by 3 publications

(7 citation statements)

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“…Comparing the values of the present work with the values given in the literature, the parameter 𝑛𝑛 is in good agreement with those from the summary in [8] The crack growth parameter 𝑣𝑣 � is slightly higher than most values commonly found in the literature, yet in a realistic range.…”

Section: Subcritical Crack Growth Parameterssupporting

confidence: 90%

“…Anderson [16], Haldimann [8]. For quarter-circle cracks on the glass surface 𝑌𝑌 = 0.722 by Porter and Houlsby [17] or for half penny shaped cracks on a flexure specimen 𝑌𝑌 = 0.713 by Haldimann [8] can be used. Due to this data situation, the still unknown geometry of the initial cracks and the fact, that the comparison of cracks with identical initial lengths is the subject of this investigation, the assumption that 𝑌𝑌 is constant was made.…”

Section: Simulation Of Environmental Influence On Failurementioning

confidence: 99%

“…The geometry factor 𝑌𝑌 approaches 𝑌𝑌 = 1.122 for cracks that are considerably smaller than the thickness of the considered object and are straight fronted, see e.g. Anderson [16], Haldimann [8]. For quarter-circle cracks on the glass surface 𝑌𝑌 = 0.722 by Porter and Houlsby [17] or for half penny shaped cracks on a flexure specimen 𝑌𝑌 = 0.713 by Haldimann [8] can be used.…”

Section: Simulation Of Environmental Influence On Failurementioning

confidence: 99%

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Subcritical Crack Growth Parameters for Glass under Different Environmental Conditions

2021

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In the present work, subcritical crack growth in soda-lime silicate glass is investigated under different environmental conditions. Crack growth parameters as a function of temperature and humidity were determined by dynamic fatigue tests. The specimens were pre-damaged for constant initial crack lengths in all specimens using the Vickers indenter. The initial flaw size induced by the Vickers indenter was obtained by a scanning electron microscope picture of the fracture surface, which could also show the initial flaw geometry. Furthermore, the influence of humidity and temperature on the failure stress of specimens with a constant initial crack length was simulated and the deviations are shown. A comprehensive version of this investigation is currently (16.03.2021) under review in the Journal for Glass Structures and Engineering.

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Section: Subcritical Crack Growth Parameterssupporting

confidence: 90%

Section: Simulation Of Environmental Influence On Failurementioning

confidence: 99%

Section: Simulation Of Environmental Influence On Failurementioning

confidence: 99%

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Subcritical Crack Growth Parameters for Glass under Different Environmental Conditions

2021

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“…2 zeigen, dass die Risswachstumsgeschwindigkeit wie erwartet bei steigender Temperatur und Feuchtigkeit zunimmt. Bei Vergleich der hier ermittelten Werte mit den Zusammenfassungen in [9][10][11] fällt auf, dass der Risswachstumspara- [18] und wurde bereits in mehreren Studien verwendet [9].…”

Section: Risswachstumsparameterunclassified

“…dargestellt werden, wobei n und v 0 die Risswachstumsparameter und K Ic die kritische Spannungsintensität darstellen [7,8]. Eine Übersicht der in der Literatur ermittelten Werte für die Risswachstumsparameter n und v 0 sind in [9][10][11][12] dargestellt. Für die experimentelle Bestimmung der subkritischen Risswachstumsparameter wurden bereits mehrere Studien veröffentlicht [13][14][15], wobei in den meisten Fällen Glas mit künstlich erzeugten Rissen verwendet wurde.…”

Section: Introductionunclassified

Subkritisches Risswachstum in Glas in Abhängigkeit der Umgebungsbedingungen

2021

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Im vorliegenden Artikel wird das subkritische Risswachstum in Kalk-Natron-Silikatglas in Abhängigkeit von Temperatur und Feuchtigkeit untersucht. Dabei werden Risswachstumsparameter innerhalb einer Klimakammer mittels Doppelring-Biegeversuchen ermittelt. Um gleichbleibende initiale Risslängen in allen Probekörpern zu erhalten, sind diese mittels Vickers-Eindringprüfung vorgeschädigt. In einem numerischen Modell wird abschließend der Einfluss der am Riss vorhandenen Feuchtigkeit auf die Versagensspannung von Glas abgebildet und der Einfluss der in der Literatur vorhandenen Risswachstumsparameter auf das Versagen von Glas kritisch diskutiert.Subcritical crack growth in glass depending on environmental conditions. Subcritical crack growth in soda-lime-silicateglass is investigated under different environmental conditions. Crack growth parameters as a function of these conditions are determined by coaxial ring-on-ring tests. For a constant initial crack size in all specimen, the Vickers indentation tests was utilized. The influence of the present humidity at the crack tip on the failure strength of glass was simulated numerically. Finally, the general influence of the crack growth parameters available in literature on the failure of glass is discussed.

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Aspects of a Safety Operation of Service Robots on Glass Walls

Horák

Novotný

Starý

et al. 2015

AMM

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The paper focuses on problems of the safety operation of service robots on glass facades of high-rise buildings exposed to a local additional load during the robot motion and any subsequent service operation (e.g. cleaning, diagnostics, mounting). Owing to afraid of a possible glass cracking and a subsequent destruction, the authors pay attention to an analysis of the strength of façade glass sheets being in contact with the robot holding-down vacuum system as well as with the supporting steel construction. With a view of appraising a state of stress, a computer model was build up respecting the real composition of façade glass, material properties and contact edge conditions. The paper presents achieved results by means of graphic outputs, and in conclusion, it discusses them with aim to supply owners of service robots from a sphere of the building administration a number of details.

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Extending the Field of Application of Structural Glass Design Concepts

Cited by 3 publications

References 0 publications

Subcritical Crack Growth Parameters for Glass under Different Environmental Conditions

Subcritical Crack Growth Parameters for Glass under Different Environmental Conditions

Subkritisches Risswachstum in Glas in Abhängigkeit der Umgebungsbedingungen

Aspects of a Safety Operation of Service Robots on Glass Walls

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