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

Roux, Stéphane; Réthoré, Julien; Hild, François

doi:10.1088/0022-3727/42/21/214004

Cited by 209 publications

(151 citation statements)

References 82 publications

(162 reference statements)

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“…DIC is definitely a tool of choice to analyze cracked samples and structures [2]. In particular, for cyclic tests, one key aspect is related to the estimation of crack opening and closure levels when studying the propagation conditions.…”

Section: Introductionmentioning

confidence: 99%

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Identification of a crack propagation law by digital image correlation

Mathieu

Hild

Roux

2012

International Journal of Fatigue

119

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It is proposed to use digital image correlation (DIC) to identify parameters governing crack propagation of commercially pure titanium. To achieve this goal, crack tip location, stress intensity factor, T -stress and plastic zone size are sought. Most of the DIC approaches are based upon local analyses of displacements, and their subsequent projection onto a set of mechanically relevant fields. It is proposed to perform these two sequential steps in a unique (and integrated) way, and to compare the results with a global approach to DIC with subsequent post-processing. A priori performances of two global approaches are compared, and a propagation law is identified form the series of raw images of a fatigue test on commercially pure titanium with the integrated approach that yields better results.

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Section: Introductionmentioning

confidence: 99%

“…This type of approach was applied both on numerical simulations [27], and experimental results [5,28,2,26]. It will be used herein to follow the crack tip in a cyclic test during which propagation occurs.…”

Section: Introductionmentioning

confidence: 99%

Identification of a crack propagation law by digital image correlation

Mathieu

Hild

Roux

2012

International Journal of Fatigue

119

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“…This condition is clearly violated when a crack is formed on the specimen, and suggests additional care when dealing with DIC measurements from dynamic impact tests, such as in, e.g., [45], [47]. Thus, care must be taken to exclude regions where the continuum hypothesis is violated, unless extended DIC formulations are adopted [60], [61]. However, such extended DIC formulations are still under development, and out of the scope of the present review.…”

Section: Digital Image Correlationmentioning

confidence: 96%

Extracting accurate strain measurements in bone mechanics: A critical review of current methods

Grassi

Isaksson

2015

Journal of the Mechanical Behavior of Biomedical Materials

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Osteoporosis related fractures are a social burden that advocates for more accurate fracture prediction methods. Mechanistic methods, e.g. finite element models, have been proposed as a tool to better predict bone mechanical behaviour and strength. However, there is little consensus about the optimal constitutive law to describe bone as a material. Extracting reliable and relevant strain data from experimental tests is of fundamental importance to better understand bone mechanical properties, and to validate numerical models.Several techniques have been used to measure strain in experimental mechanics, with substantial differences in terms of accuracy, precision, time-and length-scale. Each technique presents upsides and downsides that must be carefully evaluated when designing the experiment. Moreover, additional complexities are often encountered when applying such strain measurement techniques to bone, due to its complex composite structure. 2This review of literature examined the four most commonly adopted methods for strain measurements (strain gauges, fibre Bragg grating sensors, digital image correlation, and digital volume correlation), with a focus on studies with bone as a substrate material, at the organ and tissue level. For each of them the working principles, a summary of the main applications to bone mechanics at the organ-and tissue-level, and a list of pros and cons are provided.

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“…This measurement method is simple to implement compare to others methods and the precision of the system is circa one micrometer [13]. Only the treated area was measured and is represented as follow.…”

Section: B Sample Shape Measurementmentioning

confidence: 99%

The effect of an electromagnetic peening process on mumetal properties

Chazottes-Leconte

Sonde

Plantevin

et al. 2018

2018 IEEE International Conference on Industrial Technology (ICIT)

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Abstract-Peening processes are widely used in the industries to enhance the performance of the most solicited parts of mechanical pieces. Actual processes, like shot peening and low plasticity burnishing, are quite limited to a small depth of treatment circa 1 mm at maximum. A new process is developed based on pulsed electromagnetic fields. This method allows a better depth of treatment up to 5 mm and it can be easily monitored. A prototype was developed using a pulse current generator and specifically designed inductor. This prototype was used on mumetal for the preliminary tests. Indeed, its maximal permeability and coercivity are highly impacted by the presence of stresses. Using specifics sensors, some changes occur after treatment on mumetal samples and can be observed.

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

Cited by 209 publications

References 82 publications

Identification of a crack propagation law by digital image correlation

Identification of a crack propagation law by digital image correlation

Extracting accurate strain measurements in bone mechanics: A critical review of current methods

The effect of an electromagnetic peening process on mumetal properties

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