On non-destructive residual stress measurement in glass panels

Aben, Hillar; Anton, Johan; Errapart, Andrei; Hödemann, Siim; Kikas, J.; Klaassen, Helina; Lamp, Marko

doi:10.3176/eng.2010.2.04

Cited by 37 publications

(22 citation statements)

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“…For instance, using SCALP-05, the surface compression in float, heat-treated and tempered glass specimens were determined to be ;7, 120 and 160 MPa, respectively. 18 The potential of SCALP-05 to measure stresses along the thickness of glass was also exploited in the literature: for instance, stresses up to a depth of ;2.2 mm were determined in float, tempered and chemically toughen glass specimens. 20 The research presented in the literature suggests the potential of SCALP-05 to measure residual stresses present in float glass, and as it will be shown in the latter half of this article, the results of SCALP-05 were used to validate the predictions of the contour method/eigenstrain hybrid model proposed in this article.…”

Section: Experimental Investigations Of Residual Stress In Glassmentioning

confidence: 99%

“…SCALP-05 was calibrated 18 using the experimental results of four-point bending experiments conducted in accordance with EN 1288-3 19 and the stresses measured using GASPs. For instance, using SCALP-05, the surface compression in float, heat-treated and tempered glass specimens were determined to be ;7, 120 and 160 MPa, respectively.…”

Section: Experimental Investigations Of Residual Stress In Glassmentioning

confidence: 99%

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An experimentally validated contour method/eigenstrains hybrid model to incorporate residual stresses in glass structural designs

Achintha

Balan

2015

The Journal of Strain Analysis for Engineering Design

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Contour method-based finite element models together with knowledge of the surface deformation resulted from the stress relaxation along a newly cut-plane were used to construct the residual stresses in commercially available float glass. The results show that the residual stress depth profile of float glass is parabolic. The constructed residual stress profiles, validated to some extent against results of scattered light polariscope experiments, were then used to establish the misfit strains (i.e. eigenstrains) existed in the original glass specimens. It is shown that despite the modelling uncertainty of the contour method and the limitations associated with the scattered light polariscope measurements, the eigenstrain depth profile in a given float glass specimen can be determined to an acceptable accuracy. The article shows that once the underlying eigenstrain distribution in a given thickness of glass has been determined, the complete residual stress distribution can simply be determined by incorporating the eigenstrain profile as a misfit strain in an appropriate finite element model. It is also shown that the hybrid contour method/eigenstrain model enables modelling the residual stress around stress concentration features such as holes and/or stress evolution during subsequent applied loadings, by simply using the knowledge of eigenstrains.

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Section: Experimental Investigations Of Residual Stress In Glassmentioning

confidence: 99%

Section: Experimental Investigations Of Residual Stress In Glassmentioning

confidence: 99%

An experimentally validated contour method/eigenstrains hybrid model to incorporate residual stresses in glass structural designs

Achintha

Balan

2015

The Journal of Strain Analysis for Engineering Design

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“…Figure 6d also shows an optical micrograph of an actual secondary crack for the same conditions. The stress in the tested plate was measured prior to fracture by standard optical methods, as described by Aben et al (2010). It was found that the fracture surface predicted by the model accurately depicts the location and the shape of the mirror-mist boundary region.…”

Section: Evaluation Of the Crack Evolution Modelmentioning

confidence: 99%

“…These significant compressive stresses at the surface act as crack-closing forces. This increases the bending strength of tempered glass plates by an amount approximately equal in magnitude to the residual stress at the surface (Aben et al 2010;Conway and Mecholsky 1989). An additional distinctive feature of tempered glass is the high degree of fragmentation at fracture.…”

Section: Introductionmentioning

confidence: 95%

Analytical model of dynamic crack evolution in tempered and strengthened glass plates

2014

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Modern buildings and vehicles are increasingly employing tempered and strengthened glass plates as architectural and critical load-bearing structural components. Nevertheless, the fracture behavior of these components is only poorly understood and the literature is largely empirical or anecdotal. In this manuscript we implement a semi-static fracture mechanicsbased model to describe the evolution of a single crack in tempered and strengthened glass plates. This analytical model applies to cracks driven by residual stress and to fracture origins located at the plate's symmetry plane. The model was validated by comparing the branching length, R B , and the mirror radius, R m , computed, to mechanical tests conducted by the authors and results reported in the literature. Branching lengths and mirror radii were found to strongly correlate with the plate's thickness, 2W , and with the peak tensile stress, σ f . It was found that crack branching and mist formation are bounded by the non-dimensional parameter Π 1 ≡ σ f ·W 0.5 /K I C > 3.5 and Π 1 > 3.2 respectively. R. Dugnani (B) Room 203 UM-Shanghai Jiao Tong University (UM-SJTU) -Joint Institute, Finally, it was determined that the branching length displayed a non-zero lower bound approximately equal to a quarter of the plate's thickness whereas the mirror radius had a theoretical zero lower-bound.

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“…The intensity of the scattered light depends on the birefringence caused by the stresses. This opens up the possibility to measure the distribution of the residual stresses through the thickness of glass objects [6][7][8]. Figure 3a shows the scattered light measurement scheme.…”

Section: The Scattered Light Methodsmentioning

confidence: 99%

Photoelastic residual stress measurement in nonaxisymmetric glass containers

Errapart

Anton

2010

EPJ Web of Conferences

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Abstract. Residual stresses in axisymmetric glass containers are mostly measured with integrated photoelasticity. However, many containers, e.g. cosmetic bottles and bottles of expensive alcoholic drinks, often have a non-axisymmetric form. In this paper we consider residual stress measurement in such containers with a modified integrated photoelasticity technique, with the scattered light method and with a simple method of surface stress measurement.

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On non-destructive residual stress measurement in glass panels

Cited by 37 publications

References 1 publication

An experimentally validated contour method/eigenstrains hybrid model to incorporate residual stresses in glass structural designs

An experimentally validated contour method/eigenstrains hybrid model to incorporate residual stresses in glass structural designs

Analytical model of dynamic crack evolution in tempered and strengthened glass plates

Photoelastic residual stress measurement in nonaxisymmetric glass containers

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