Application of Digital Image Correlation (DIC) Method for Road Material Testing

Górszczyk, Jarosław; Malicki, Konrad; Zych, Teresa

doi:10.3390/ma12152349

Cited by 55 publications

(32 citation statements)

References 30 publications

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“…The DiC technique is widely used in static and fatigue tests, it is a non-contact and non-interferometric optical method applied for measuring the structural elements’ surface deformation. References [ 31 , 32 , 33 , 34 ] present the implementation of the DiC method for the selected laboratory tests of building materials. This method has also been used to measure local plastic deformation in the material during uniaxial tension [ 35 , 36 ].…”

Section: Experiments Setup and Resultsmentioning

confidence: 99%

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Modeling and Experimental Analysis of Shear-Slitting of AA6111-T4 Aluminum Alloy Sheet

et al. 2020

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This work presents experimental studies with numerical modeling, aiming at the development of guidelines for shaping aluminum alloy AA6111-T4, t = 1.5 mm thick, with the use of a shear-slitting operation. During the experimental tests, parametric analyses were conducted for the selected material thickness. For the purposes of the material deformation’s analysis, a vision system based on the digital image correlation (DiC) method was used. Numerical models were developed with the use of finite element analysis (FEA) and the mesh-free method: smoothed particle hydrodynamics (SPH), which were used to analyze the residual stress and strain in the cutting zone at different process conditions. The results indicate a significant effect of the horizontal clearance between knives on the width of the deformation zone on sheet cut edge. Together with the clearance value increase, the deformation zone increases. The highest burrs on the cut edge were obtained, when the slitting speed was set to v = 17 m/min, and clearance to hc = 6%t. A strong influence was observed of the horizontal clearance value at high slitting speeds on burr unshapeliness. The most favorable conditions were obtained for v = 32 m/min, hc = 0.062 mm, and rake angle of upper knife for α = 30°. For this configuration, a smooth sheared edge with minimal burr height was obtained.

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Section: Experiments Setup and Resultsmentioning

confidence: 99%

“…At the beginning, a tested specimen need to be prepared applying a unique pattern of random speckles/dots on its surface. The speckle pattern can be the natural texture of the specimen surface [ 31 , 32 , 41 ]. In this work, we have conducted many tests to obtain reliable DiC conditions.…”

Section: Experiments Setup and Resultsmentioning

confidence: 99%

Modeling and Experimental Analysis of Shear-Slitting of AA6111-T4 Aluminum Alloy Sheet

et al. 2020

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“…In the experiments, the commercial strain imaging systems Vic 2D ® (Correlated Solutions, Columbia, SC, USA) and ARAMIS ® (GOM, Germany), based on digital image correlation (DIC) technique [ 47 , 48 , 49 ], were used to measure the principal strain history at the outer surface of the tested specimens. It is worthy to note that DIC techniques are being increasingly and extensively used to automatically measure strain maps at the whole surface with high accuracy in different applications, such as, thermal deformation of materials [ 50 ], metal forming [ 51 ], mechanical testing of building materials [ 52 ], or biomechanical analysis of bone tissues [ 53 ], among others.…”

Section: Experimentationmentioning

confidence: 99%

On the Use of Strain Path Independent Metrics and Critical Distance Rule for Predicting Failure of AA7075-O Stretch-Bend Sheets

2020

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The strain-based forming limit curve is the traditional tool to assess the formability of metal sheets. However, its application should be restricted to proportional loading processes under uniform strain conditions. Several works have focused on overcoming this limitation to characterize the safe process windows in industrial stretch-bend forming processes. In this paper, the use of critical distance rule and two path-independent stress-based metrics are explored to numerically predict failure of AA7075-O stretch-bend sheets with 1.6 mm thickness. Formability limits of the material were experimentally obtained by means of a series of Nakazima and stretch-bending tests at different thickness-over-radius ratios for inducing controlled non-uniform strain distributions across the sheet thickness. By using a 3D calibrated finite element model, the strain-based forming limit curve was numerically transformed into the path-independent stress and equivalent plastic strain polar spaces. The numerical predictions of necking strains in the stretch-bending simulations using the above approaches were successfully compared and critically discussed with the experimental results for different values of the critical distance. It was found that failure was triggered by a critical material volume of around the half thickness, measured from the inner surface, for the both path-independent metrics analyzed.

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“…Particularmente, la DIC ha adquirido mucha popularidad en las últimas décadas ya que permite la medición de desplazamientos y de deformaciones unitarias en 1D, 2D y 3D (Pan et al, 2009, Szczepanek et al, 2011. Por tal motivo, la DIC es ampliamente usada en la industria y en la mecánica experimental (Castillo et al, 2019, Górszczyk et al, 2019, Malesa et al, 2013, Malesa et al, 2015. En este trabajo se usa esta técnica para medir deformaciones unitarias uniaxiales en experimentos de creep de corto plazo (10 minutos) en un material de caucho (VMQ), para diferentes estados de esfuerzo axial.…”

Section: Introductionunclassified

Medición y obtención de modelo de fluencia lenta en elastómeros

Amador-González

Sotomayor-del-Moral

Pascual-Francisco

et al. 2021

ICBI

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En este trabajo se aplicó la técnica de correlación digital de imágenes para la medición de deformaciones unitarias en material de caucho. El material estudiando se sometió a experimentos de fluencia lenta o creep de corto plazo, con una duración de 10 minutos. Las deformaciones unitarias medidas en ese periodo de tiempo fueron graficadas y, mediante la implementación de un modelo viscoelástico, se obtuvieron las funcione de creep, con las cuales es posible predecir las deformaciones para tiempos prolongados. Se comprobó que el comportamiento de creep en el caucho se ajusta al modelo viscoelástico de Burgers. Asimismo, los resultados obtenidos demostraron que la técnica de correlación digital de imágenes es una herramienta poderosa para la evaluación de viscoelasticidad en los elastómeros.

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Application of Digital Image Correlation (DIC) Method for Road Material Testing

Cited by 55 publications

References 30 publications

Modeling and Experimental Analysis of Shear-Slitting of AA6111-T4 Aluminum Alloy Sheet

Modeling and Experimental Analysis of Shear-Slitting of AA6111-T4 Aluminum Alloy Sheet

On the Use of Strain Path Independent Metrics and Critical Distance Rule for Predicting Failure of AA7075-O Stretch-Bend Sheets

Medición y obtención de modelo de fluencia lenta en elastómeros

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