Automatic Evaluation of Mixed‐mode Stress Intensity Factors Utilizing Digital Image Correlation

Yoneyama, Satoru; Morimoto, Yoshitaka; Mutoh, T.

doi:10.1111/j.1475-1305.2006.00246.x

Cited by 196 publications

(108 citation statements)

References 12 publications

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“…Some early analyses used leastsquares methods to fit the Williams' series to the DIC results, and obtained the mode I SIF [32]. The method has also been extended to mixed mode loading [33][34][35][36][37]. However, the leastsquares technique is quite sensitive to accurate definition of the crack tip location, as highlighted by McNeill [32].…”

Section: Introductionmentioning

confidence: 99%

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

et al. 2017

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A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).

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Section: Introductionmentioning

confidence: 99%

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

et al. 2017

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“…4. Parhizgar et al [10] reported a similar result for quasi-static fracture of glass fiber/epoxy system. Rowlands [11] also reported increasing critical stress intensity factor with increasing angle, but the trend was not an exponential variation possibly due to the multidirectional composite laminates he has studied.…”

Section: Discussionmentioning

confidence: 57%

Stress-wave induced fracture of unidirectional composites: an experimental study using digital image correlation method

Lee

Tippur

2009

SPIE Proceedings

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Fracture behavior of unidirectional graphite/epoxy composite materials is investigated. Single-edge notched coupons are studied under geometrically symmetric impact loading. The notch orientation parallel to or at an angle relative to the fiber orientation is considered to produce mode-I as well as mixed-mode fracture. Stress-wave induced crack initiation and rapid crack growth events are studied using the digital correlation technique and high-speed photography. Surface deformations histories in the crack-tip vicinity are obtained by analyzing speckle image recordings. Measured deformation fields are used to extract mixedmode fracture parameters and examine the effect of fiber orientation on crack initiation and growth behaviors. The maximum crack speed observed is the highest for mode-I dominant conditions and decreases with increasing fiber orientation angle. With increasing fiber orientation angle, crack takes longer to attain the maximum speed upon initiation. The crack initiation toughness values decrease with increasing degree-of-anisotropy.

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“…he experimental characterisation of crack tip fields is normally done using surface techniques such as photoelasticity [1], Moiré interferometry [2], thermo-elastic stress analysis [3], electronic speckle pattern interferometry [4] or digital image correlation [5,6]. For thin components, the surface behaviour is normally representative of the T complete behaviour [7].…”

Section: Introductionmentioning

confidence: 99%

Mid-thickness studies of the stress intensity factor in the bulk of bainitic steel

López-Crespo

Vazquez-Peralta

Simpson³

et al. 2017

Frattura Ed Integrità Strutturale

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ABSTRACT. The current work aims at estimating the stress intensity factor deep inside the bulk from elastic strain data measured by synchrotron X-ray diffraction. Key features affecting the evaluation of the stress intensity factor are the number of terms in the analytical model describing the crack tip field, the extension and position of the area of interest of the experimental data, the effect of the experimental data collected within the plastic zone and the number of elastic strain data points used. Here a parametric study of these features is presented in terms of their influence for the stress intensity factor determination. It was found that 3 or 4 terms in Williams' expansion is often sufficient; the data should be collected from across the full range of angles around the crack tip; and the number of points/number of terms should be greater than 40.

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Automatic Evaluation of Mixed‐mode Stress Intensity Factors Utilizing Digital Image Correlation

Cited by 196 publications

References 12 publications

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

Stress-wave induced fracture of unidirectional composites: an experimental study using digital image correlation method

Mid-thickness studies of the stress intensity factor in the bulk of bainitic steel

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