Perspective error reduction in 2D Digital Image Correlation measurements by combination with Defocused Speckle Imaging

2022 ◽  
Vol 149 ◽  
pp. 106820
Author(s):  
Juuso Heikkinen ◽  
Gary S Schajer
2021 ◽  
Vol 13 (10) ◽  
pp. 1964
Author(s):  
Devan Atkinson ◽  
Thorsten Becker

The authors wish to make the following corrections to the paper [...]


2021 ◽  
Vol 11 (18) ◽  
pp. 8334
Author(s):  
Andina Sprince ◽  
Tomass Kozlovskis ◽  
Rihards Gailitis ◽  
Juozas Valivonis ◽  
Kinga Korniejenko ◽  
...  

Creep and shrinkage of Cement and Concrete Composites (CCC) are significant properties that need to be considered to use these materials in practice. Many previous scientific studies revealed CCC creep characteristics under sustained compression and shrinkage, using traditional test methods from design standards. Because of the complexity of experimental procedures, CCC creep in tension has not been studied as close. Furthermore, there is no unified standard that proposes applicable testing methods or specific testing apparatus. This study examines the suitability of 2D—Digital Image Correlation (DIC) to observe the creep deformations of specimens under tension. Ordinary Portland cement (OPC) mortar with 1% polyvinyl alcohol (PVA) fibres has been investigated in the research. Compact tension (CT) specimens 150 × 150 × 12 mm (with a notch) were used. Creep deformations under sustained uniaxial tension (applied loading corresponding to 60% of the ultimate strength) were measured. DIC images were captured using an entry/mid-level DSLR camera. Results show that DIC is suitable for studying uniaxial tensile creep of cement and concrete composites. Deformation of specimens in tension was similar to that measured using the conventional method (using surface-attached gauges).


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