Fracture mechanics based interpretation of the load sequence effect in the flexural fatigue behavior of concrete using digital image correlation

2021 ◽  
Vol 307 ◽  
pp. 124817
Author(s):  
Abedulgader Baktheer ◽  
Henrik Becks
Keyword(s):  
Fracture Mechanics ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Fatigue Behavior ◽  
Image Correlation ◽  
Sequence Effect ◽  
Flexural Fatigue ◽  
Load Sequence

Use of Digital Image Correlation for the Evaluation of Flexural Fatigue Behavior of Asphalt Beams with Geosynthetic Interlayers

2017 ◽  
Vol 2631 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Vinay Kumar V ◽  
Sireesh Saride
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Digital Images ◽  
Fatigue Behavior ◽  
Bottom Layer ◽  
Fatigue Performance ◽  
Image Correlation ◽  
Bending Test ◽  
Flexural Fatigue ◽  
Tensile Strains

In this study, the flexural fatigue performance of two-layer asphalt beams with and without geosynthetic interlayers was evaluated with a digital image correlation (DIC) technique. A field scenario was simulated by considering an old, destressed pavement as the bottom layer with a compacted bituminous mix as an overlay. An appropriate tack coat and geosynthetic interlayer were at the interface. The digital images were recorded at a specific interval of load cycles during a repeated load four-point bending test. The displacement fields obtained from the digital images were analyzed so that the crack width, crack height, and tensile strains could be obtained and the crack initiation and propagation phenomena studied. The deformation data obtained from the DIC analysis were validated with the vertical deformations measured through linear variable differential transformers. The DIC results correlated very well with the measured data. The DIC data indicated that the tensile strains were as high as 4.75% at the crack tip in the control specimen compared with 1.42% in a polyester grid interlayered specimen at the failure of the corresponding specimens. With the inclusion of interlayers, the fatigue performance of the two-layer asphalt beam specimens improved by about 39, 12, and 1.7 times for Specimens I1, I2, and I3, respectively.

Digital image correlation analysis of crack behavior in a reinforced concrete beam during a load test

2006 ◽  
Vol 33 (11) ◽  
pp. 1418-1425 ◽  
Author(s):  
Michel Küntz ◽  
Marc Jolin ◽  
Josée Bastien ◽  
Fabien Perez ◽  
François Hild
Keyword(s):  
Reinforced Concrete ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Displacement Field ◽  
Concrete Beam ◽  
Fatigue Behavior ◽  
Reinforced Concrete Beam ◽  
Load Test ◽  
Image Correlation ◽  
Loading Test

A displacement-measuring technique using digital image cross-correlation was applied to study the in situ behavior of a shear crack in a reinforced concrete beam during a bridge static load test. A numerical approach allowed measurement of the displacement field at the location of the crack on a 110 mm × 130 mm surface with a resolution of the order of 10 µm. Results of the analysis indicate that crack loading varies significantly with load position and sequence of applications to the structure. These results further indicate that damage cannot be attributed to the repetition of a single load cycle, as is often the case. The findings should improve the understanding of the fatigue behavior of reinforced concrete structures under operating conditions.Key words: displacement field, crack opening displacement, digital image correlation, static loading test, fatigue, durability, reinforced concrete, monitoring.

Fracture Mechanics Evaluation of Adhesive Joint by Digital Image Correlation

2018 ◽  
Vol 2018 (0) ◽  
pp. J0470304
Author(s):  
Shota SHIMAMOTO ◽  
Kento SHIMIZU ◽  
Masaki OMIYA ◽  
Satoru YONEYAMA
Keyword(s):  
Fracture Mechanics ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Adhesive Joint ◽  
Image Correlation
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