Remaining stress-state and strain-energy in tempered glass fragments

Nielsen, Jens Henrik

doi:10.1007/s40940-016-0036-z

Cited by 30 publications

(21 citation statements)

References 9 publications

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“…A derivation of this can be found in the literature, e.g. Barsom (1968), Gulati (1997), Nielsen (2016), Reich et al (2012), Warren (2001).…”

Section: The Tempering Processmentioning

confidence: 96%

“…A recently published study by Nielsen (2016) provides a numerical calculation of the remaining stress state and strain energy in a tempered glass fragment. The model is based on a linear elastic finite element model.…”

Section: The Tempering Processmentioning

confidence: 99%

“…In line with Nielsen (2016), a parametric study using a cylindrical fragment is carried out. The FE-model is setup in the same way as described in the before mentioned paper and similar to what is described in Sect.…”

Section: Parametric Study On Fragment Deformationmentioning

confidence: 99%

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Deformations and strain energy in fragments of tempered glass: experimental and numerical investigation

Nielsen

Bjarrum

2017

Glass Struct Eng

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The present paper is adding to the current knowledge by experimentally investigating the change of strain in a fragment of tempered glass. This is done by comparing the surface shape before and after fracture. The present work also aims at validating a FE-model for estimating the remaining strain energy and thereby the stress in a fragment post failure. The FE-model have been established in previous work Nielsen (Glass Struct Eng, 2016. doi:10.1007/s40940-016-0036-z) and is applied here on the specific geometry and initial state of the investigated fragments. This is done by measuring the residual stresses using a Scattered Light Polariscope before failure and thereby determining the initial stress state. The Geometry of the investigated fragment is found by means of a 3D scan. The surface topology of the fragment is found by letting a stylus traverse the surface and recording the shape. These information are then used for setting up a FE-model for calculating the stresses and strains left in the fragment after failure and compare the deformation to the measured.

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“…A derivation of this can be found in the literature, e.g. Barsom (1968), Gulati (1997), Nielsen (2016), Reich et al (2012), Warren (2001).…”

Section: The Tempering Processmentioning

confidence: 96%

Section: The Tempering Processmentioning

confidence: 99%

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Deformations and strain energy in fragments of tempered glass: experimental and numerical investigation

Nielsen

Bjarrum

2017

Glass Struct Eng

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“…where it should be noted that in this study, it is assumed that the glass is only subjected to residual stress from the thermal tempering U 0 = U Residual stress . When the glass is fragmentized the internal energy converts into a number of forms of energies (Reich et al 2013;Nielsen 2017), e.g. for creating new fracture surfaces (cracking and crack branching), kinetics and sound energy.…”

Section: Introductionmentioning

confidence: 99%

“…The other forms of energy are not included here. The remaining stress state and the resulting remaining elastic strain energy in a single fragment has been calculated numerically by Nielsen (2017). Further experimental and numerical investigations of fragment's deformation and strain energy were carried out by Nielsen and Bjarrum (2017).…”

Section: Introductionmentioning

confidence: 99%

Relationship between strain energy and fracture pattern morphology of thermally tempered glass for the prediction of the 2D macro-scale fragmentation of glass

Pourmoghaddam

Kraus²,

Schneider

et al. 2018

Glass Struct Eng

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This work deals with the prediction of glass breakage. A theoretical method based on linear elastic fracture mechanics (LEFM) merged with approaches from stochastic geometry is used to predict the 2Dmacro-scale fragmentation of glass. In order to predict the fragmentation of glass the 2D Voronoi tesselation of distributed points based on spatial point processes is used. However, for the distribution of the points influence parameters of the fracture structure are determined. The approach is based on two influencing parameters of fragment size δ and fracture intensity λ, which are described in this paper. The Fragment Size Parameter describes the minimum distance between the points and thus the size of a fragment. It is derived from the range of influence of the remaining elastic strain energy in a single fragment taking into account the LEFM based on the energy criterion of Griffith. It considers the extent of the initial elastic strain energy U 0 before fragmentation obtained from the residual stress as well as a ratio of the released energy η due to fragmentation. The Fracture Intensity Parameter describes the intensity of the fragment dis

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Einfluss der Zwischenschicht auf das Bruchverhalten von Verbundsicherheitsglas

Weis

Siebert

2022

ce papers

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Ein aktuelles Forschungsthema im Bereich des konstruktiven Glasbaus ist der rechnerische Nachweis der Resttragfähigkeit von Verbundsicherheitsglas (VSG) aus Einscheibensicherheitsglas (ESG). Zur Beschreibung des Resttragverhaltens ist neben der reinen Zwischenschicht auch der Verbund sowie der Kontakt zwischen den Glasbruchstücken zu charakterisieren. Somit ist es im Fall von gebrochenem VSG aus ESG notwendig, das Bruchbild zu erfassen. Bisherige Untersuchungen fanden dahingehend an einzelnen, monolithischen ESG (Mono‐Scheiben) statt. In dieser Arbeit wird der Einfluss der Zwischenschicht auf das Bruchverhalten und das dadurch bedingte Bruchbild untersucht und mithilfe modernster Messgeräte wie Zeiss Scanner, Highspeed‐Kamera und CulletScanner erfasst. Schließlich kann gezeigt werden, dass sich das Bruchverhalten eines ESG als Teil von VSG eklatant von dem einer Mono‐Scheibe unterscheidet. Influence of the interlayer on the fracture behavior of laminated safety glass. A current research topic in the field of structural glass engineering is the computational design of the residual load‐bearing capacity of laminated safety glass made from fully tempered glass (FTG). To describe the residual load‐bearing behaviour besides the interlayer itself, the bond and the contact between the glass fragments must also be characterized. Thus, in the case of broken laminated safety glass made from FTG, it is necessary to determine the fracture pattern. Previous investigations have been carried out on mono‐panes. In this work, the influence of the interlayer on the fracture behaviour and the resulting fracture pattern is investigated for the first time and recorded using state‐of‐the‐art measuring equipment such as Zeiss scanners, high‐speed camera, and cullet scanner. Finally, it can be shown that the fracture behaviour of a laminated safety glass differs from that of a mono layer.

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Remaining stress-state and strain-energy in tempered glass fragments

Cited by 30 publications

References 9 publications

Deformations and strain energy in fragments of tempered glass: experimental and numerical investigation

Deformations and strain energy in fragments of tempered glass: experimental and numerical investigation

Relationship between strain energy and fracture pattern morphology of thermally tempered glass for the prediction of the 2D macro-scale fragmentation of glass

Einfluss der Zwischenschicht auf das Bruchverhalten von Verbundsicherheitsglas

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