Viscoelastoplastic Damage Characterization of Asphalt–Aggregate Mixtures Using Digital Image Correlation

Chehab, Ghassan R.; Seo, Youngguk; Kim, Y. Richard

doi:10.1061/(asce)1532-3641(2007)7:2(111)

Cited by 53 publications

(13 citation statements)

References 13 publications

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“…This out‐of‐plane movement disturbs the measurements as the grid method employed here is devoted to in‐plane measurements only. The same remark holds for the DIC technique employed in other studies dealing with asphalt mixtures available in the literature, see [2, 3, 5] for instance. A real 3D technique allowing out‐of‐plane measurements in addition to in‐plane ones should be used to observe and quantify this phenomenon, but it is worth mentioning that such techniques generally exhibit lower performances in terms of resolution and spatial resolution in strain.…”

Section: Methodsmentioning

confidence: 60%

Studying the Mechanical Behaviour of Asphalt Mixture with the Grid Method

Grédiac

Toussaint

2012

Strain

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The aim of this work is to analyse the strain fields that take place in several asphalt mixture specimens subjected to compression tests. The grid technique is used for this purpose. The main features of this strain measurement technique are first described. The obtained results are then discussed. They show that very strong heterogeneities take place in the strain fields. They are due to the very different mechanical properties of the constituents. Various testing conditions are also investigated because they directly influence the quality of the measurements and the ability of the grid technique to detect small strain amplitudes with a good spatial resolution, this last feature being crucial here because of the very nature of the material under test.

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Section: Methodsmentioning

confidence: 60%

Studying the Mechanical Behaviour of Asphalt Mixture with the Grid Method

Grédiac

Toussaint

2012

Strain

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“…Hence, it is difficult to give a general guideline for determination of strain accuracies. It has been shown [23] that the accuracies in strain measurements when compared with strain gage data is within ±200μ strain for standard conditions of a camera mounted on a tripod, aligned by eye and equipped with standard optics. In order to assess the precision of the measurement system, which is defined as the random difference between multiple measurements of the same quantity, a simple experiment was performed which involved a controlled rigid-body movement (increments of zero pixels) of a planar body below a fixed camera [24].…”

Section: Resultsmentioning

confidence: 99%

Fracture Properties of Concrete–Concrete Interfaces Using Digital Image Correlation

2010

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The mode I and mode II fracture toughness and the critical strain energy release rate for different concrete-concrete jointed interfaces are experimentally determined using the Digital Image Correlation technique. Concrete beams having different compressive strength materials on either side of a centrally placed vertical interface are prepared and tested under three-point bending in a closed loop servo-controlled testing machine under crack mouth opening displacement control. Digital images are captured before loading (undeformed state) and at different instances of loading. These images are analyzed using correlation techniques to compute the surface displacements, strain components, crack opening and sliding displacements, load-point displacement, crack length and crack tip location. It is seen that the CMOD and vertical load-point displacement computed using DIC analysis matches well with those measured experimentally.

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“…Wen and Kim [21] proposed the use of DIC technique as a possible strain measurement method for asphalt mixture. Seo et al [22,23] and Chehab et al [24] used digital imaging techniques for mechanical testing and for calibration and validation of visco-elasto-plastic continuum damage modeling. More recently, Birgisson et al [25] successfully used the DIC technique to monitor cracking behavior of the material at crack initiation and propagation.…”

Section: Determination Of Rve Based On the Dic Techniquementioning

confidence: 99%

Geometrical Evaluation and Experimental Verification to Determine Representative Volume Elements of Heterogeneous Asphalt Mixtures

Kim

Lee

Lutif

2010

Journal of Testing and Evaluation

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This paper presents an experimental verification of geometrically defined representative volume elements (RVEs) of heterogeneous asphalt concrete mixtures before any significant damage is initiated. A typical dense-graded Superpave mixture (12.5 mm nominal maximum aggregate size) is selected as a representative roadway paving mixture and used in this study to accomplish two parallel approaches: Geometrical analysis of mixture heterogeneity using two-dimensional actual images of asphalt concrete inner structures and experimental evaluation through uniaxial tensile tests of asphalt concrete mixtures incorporated with digital image correlation (DIC) technique. To properly address the significant heterogeneity of asphalt concrete mixtures in defining the RVE, several geometrical factors such as area fraction, gradation, orientation, and the distribution of aggregate particles in asphalt concrete mixtures are considered altogether. For the uniaxial tensile test with the DIC, the mean strains and their standard deviations captured by DIC are analyzed to confirm statistical homogeneity of RVEs evaluated from the geometrical analyses. The two approaches present similar results, indicating that typical dense-graded asphalt mixtures can be characterized for their material properties with an approximate RVE size of 60 mm. Findings from this study further imply that the simple geometrical analysis can be an efficient tool to reasonably determine the RVE of asphalt mixtures and other granular composites where significant heterogeneity is involved.

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Viscoelastoplastic Damage Characterization of Asphalt–Aggregate Mixtures Using Digital Image Correlation

Cited by 53 publications

References 13 publications

Studying the Mechanical Behaviour of Asphalt Mixture with the Grid Method

Studying the Mechanical Behaviour of Asphalt Mixture with the Grid Method

Fracture Properties of Concrete–Concrete Interfaces Using Digital Image Correlation

Geometrical Evaluation and Experimental Verification to Determine Representative Volume Elements of Heterogeneous Asphalt Mixtures

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