Elastic and residual stresses around ball indentations on glasses using a micro-photoelastic technique

Yoshida, Satoshi; Iwata, Sohtaro; Sugawara, Takuo; Miura, Yoshinari; Matsuoka, Jun; Errapart, Andrei; Kurkjian, Charles R.

doi:10.1016/j.jnoncrysol.2012.01.069

Cited by 21 publications

(19 citation statements)

References 22 publications

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“…In the past, several rather indirect techniques have been used to estimate stresses around indentations: cathodoluminescence spectroscopy (CL), crack opening displacement, and the use of secondary indentations . More recently, some of the present authors have applied a more direct photoelastic technique (PE) to such measurements . All but the PE technique have been applied to samples containing cracks and thus it is to be expected that the previous stress measurements would have suffered from this effect.…”

Section: Resultsmentioning

confidence: 99%

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Three‐dimensional densification measurement of Vickers‐indented glass using digital holographic tomography

et al. 2019

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We have used digital holographic tomography (DHT) to study the refractive index (density) changes occurring under Vickers indentations in silica, soda‐lime, and non‐alkaline aluminoborosilicate glasses. The measurements confirm that the maximum refractive index (density) is not constant but increases with load up to 300 gf. At higher loads (500 gf and 1 kgf), a subsurface (median) crack in soda‐lime glass is observed with no apparent surface trace. The appearance of this crack reduces the maximum refractive index (density) observed. In addition, the vertical cross section of the 3D refractive index (density) map has been successfully obtained using a square fiber sample and lateral observation. These results clearly demonstrate a promising potential of DHT to evaluate the shape and the density distribution of the structurally modified zone in a Vickers‐indented glass.

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Section: Resultsmentioning

confidence: 99%

“…31 More recently, some of the present authors have applied a more direct photoelastic technique (PE) to such measurements. 32,33 All but the PE technique have been applied to samples containing cracks and thus it is to be expected that the previous stress measurements would have suffered from this effect.…”

Section: Resultsmentioning

confidence: 99%

Three‐dimensional densification measurement of Vickers‐indented glass using digital holographic tomography

et al. 2019

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“…Rouxel et al used Yoffe model to predict the microcracking behavior of a series of oxide glasses. Yoshida et al estimated residual stresses around the ball indentation imprint using Yoffe model. Sglavo and Green et al modified the parameter in Yoffe model, and calculated the residual stress field generated by Vickers' indentation.…”

Section: Discussionmentioning

confidence: 99%

New insights into nanoindentation crack initiation in ion‐exchanged sodium aluminosilicate glass

Jiang

Mohagheghian

et al. 2018

J Am Ceram Soc

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The effect of ion‐exchange on the fracture behavior and the threshold load is investigated for radial crack initiation resulting from cube‐corner indentation. Both tin and air sides of the sodium aluminosilicate float glass are considered. The threshold load and mechanical properties are experimentally measured by nanoindentation. A qualitative explanation of crack initiation is developed by analyzing the stresses at the indentation site. The ion‐exchanged glasses show a lower threshold load for radial crack initiation with a cube‐corner indenter than the raw glass, and this is due to a higher crack driving stress for ion‐exchanged glasses. However, the compressive stress on the surface of the ion‐exchanged glasses can inhibit the expanding of the radial cracks. The air side always shows higher values for the threshold load than the tin side before and after ion‐exchange, which is in accordance with the calculated crack driving stress results.

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“…Details of the indentation test are explained in one previous study. 8) Since the ball indenter used in this study was an axisymmetrical one, we can assume the indentation-induced stress field to be axisymmetric. This axisymmetrical stress field enables us to obtain the threedimensional stress map of the glass around the indenter during the indentation cycle.…”

Section: +1mentioning

confidence: 99%

Micro-Photoelastic Evaluation of Indentation-Induced Stress in Glass

et al. 2019

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In this study, micro-photoelastic measurements were performed to obtain three-dimensional stress maps of silica and soda-lime glasses during ball indentation. The stress components were calculated from retardations and azimuths, which were determined from photoelastic measurements with a spatial resolution of about 1 µm. During loading, it was observed that the tensile stress in the radial direction is generated near the surfaces of both glasses. During unloading, however, it was found that stress distributions of silica and soda-lime glasses are different from each other. It is concluded that the different stress distributions during indentation result in different crack geometries, ring and radial cracks.

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Elastic and residual stresses around ball indentations on glasses using a micro-photoelastic technique

Cited by 21 publications

References 22 publications

Three‐dimensional densification measurement of Vickers‐indented glass using digital holographic tomography

Three‐dimensional densification measurement of Vickers‐indented glass using digital holographic tomography

New insights into nanoindentation crack initiation in ion‐exchanged sodium aluminosilicate glass

Micro-Photoelastic Evaluation of Indentation-Induced Stress in Glass

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