CTOA and crack-tunneling measurements in thin sheet 2024-T3 aluminum alloy

Dawicke, D. S.; Sutton, Michael A.

doi:10.1007/bf02325151

Cited by 127 publications

(68 citation statements)

References 24 publications

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“…A number of CTOA values is obtained at characteristic sites of the contours and averaged such as illustrated in Figure 9c. Examples are provided in [37] and [39][40]. Note, that the crack tip, due to plastic deformation of the crack faces (necking during crack extension) is frequently hard to detect.…”

Section: (A) Optical Microscopymentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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Section: (A) Optical Microscopymentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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“…For instance, crack tip opening angles [11] or crack tip opening displacements [12] can be measured with a very good accuracy by means of digital image correlation. In most of the ¡ to whom correspondence should be addressed.…”

Section: Vision-based Techniques Have Been Utilized To Analyze Cracksmentioning

confidence: 99%

“…Values as small as 1.1 µm separation can be resolved at 15 cm from the surface. This type of technique was successfully used to detect the crack tip in a 2024-T3 aluminum alloy with an artificial pattern [11,12]. A brightfield illumination is used in the present case and no special sample preparation is needed.…”

Section: Detection Of the Crack Tip Location By Dicmentioning

confidence: 99%

A method to determine the macroscopic toughness scatter of brittle materials

Forquin

Rota

Charles

et al. 2004

International Journal of Fracture

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Abstract. An experimental procedure is developed to determine the scatter of the macroscopic toughness of brittle materials. First, samples are precracked to obtain a sharp precrack. The toughness is then determined by using a standard three-point flexural test. Digital image correlation is used to analyze displacement fields of cracked samples. Based upon the resolution and the spatial resolution of the measurement technique, a detection criterion is proposed and validated. It allows for an accurate estimate of the crack tip location so that the presence of a crack and its size at arrest can be monitored. As an example, the toughness distribution of 18 samples made of silicon carbide is evaluated. By using a simple macro-micro transition, an analysis of the scatter in toughness is related to that in strength for the material with no macrocracks.

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“…Fracture mechanics has benefited from DIC results [23,24]. For instance, crack tip opening angles [25] or crack tip opening displacements [12,19,13] are measured with a very good accuracy by means of DIC. The technique can be applied to small areas [18], and to large structures such as aeronautical parts [26] or bridges [27] with the same algorithms.…”

Section: Introductionmentioning

confidence: 99%

Digital image correlation and fracture: an advanced technique for estimating stress intensity factors of 2D and 3D cracks

Roux¹,

Réthoré²,

Hild³

2009

J. Phys. D: Appl. Phys.

209

132

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Abstract. Digital image correlation is a measurement technique that allows one to retrieve displacement fields "separating" two digital images of the same sample at different stages of loading. Because of its remarkable sensitivity, it is not only possible to detect cracks with sub-pixel opening, which would not be visible, but also to provide accurate estimates of stress intensity factors. For this purpose suitable tools have been devised to minimize the sensitivity to noise. Working with digital images allows the experimentalist to deal with a wide range of scales from atomistic to geophysical one with the same tools. Various examples are shown at different scales, as well as some recent extensions to three dimensional cracks based on X-ray Computed micro-tomographic images.

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CTOA and crack-tunneling measurements in thin sheet 2024-T3 aluminum alloy

Cited by 127 publications

References 24 publications

Fracture and damage mechanics modelling of thin-walled structures – An overview

Fracture and damage mechanics modelling of thin-walled structures – An overview

A method to determine the macroscopic toughness scatter of brittle materials

Digital image correlation and fracture: an advanced technique for estimating stress intensity factors of 2D and 3D cracks

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