Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

2021 ◽  
Author(s):  
Ahmed Boukar ◽  
Patrick Ienny ◽  
Stephane Corn ◽  
Pierre R. Slangen
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Composite Structures ◽  
Drop Test ◽  
Image Correlation ◽  
Time Resolved ◽  
Imaging Parameters ◽  
Optical Blur

scholarly journals NUMERICAL PREDICTIONS AND MECHANICAL TESTING OF BRAIDED COMPOSITE STRUCTURES UTILISING DIGITAL IMAGE CORRELATION

2016 ◽  
Vol 7 ◽  
pp. 43
Author(s):  
Emil Pitz ◽  
Matei-Constantin Miron ◽  
Imre Kállai ◽  
Zoltán Major
Keyword(s):  
Numerical Model ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Composite Structures ◽  
Experimental Testing ◽  
Single Layer ◽  
Failure Criteria ◽  
Image Correlation ◽  
Braided Composites ◽  
Numerical Predictions

The current paper is describing the implementation of a multiscale numerical model for prediction of stiffness and strength in braided composites. The model is validated by experimental testing of single-layer braided tubes under torsional loading utilising digital image correlation (DIC). For the numerical model the entire braided structure is modelled at yarn detail level, taking into account the yarn behaviour as well as individual yarn-to-yarn interactions by using cohesive contact definitions. By means of Hashin’s failure criteria and cohesive contact damage, failure of the yarns and failure of the yarn-to-yarn interface is being accounted for. Thereby the material failure behaviour can be predicted. For validation of the model, torsion tests of biaxially braided single-layer composite tubes were performed. The strain distribution at the specimen surface was studied using the DIC system ARAMIS in 3D mode.

scholarly journals Digital Image Correlation Applications in Composite Automated Manufacturing, Inspection, and Testing

2019 ◽  
Vol 9 (13) ◽  
pp. 2719 ◽  
Author(s):  
Farjad Shadmehri ◽  
Suong Van Hoa
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Composite Structures ◽  
Structural Testing ◽  
Image Correlation ◽  
Thermoplastic Composites ◽  
Automated Manufacturing ◽  
Camera System ◽  
Composite Manufacturing ◽  
Full Field

Since its advent in the 1970s, digital image correlation (DIC) applications have been rapidly growing in different engineering fields including composite material testing and analysis. DIC combined with a stereo camera system offers full-field measurements of three-dimensional shapes, deformations (i.e., in-plane and out-of-plane deformations), and surface strains, which are of most interest in many structural testing applications. DIC systems have been used in many conventional structural testing applications in composite structures. However, DIC applications in automated composite manufacturing and inspection are scarce. There are challenges in inspection of a composite ply during automated manufacturing of composites and in measuring transient strain during in-situ manufacturing of thermoplastic composites. This article presents methodologies using DIC techniques to address these challenges. First, a few case studies where DIC was used in composite structural testing are presented, followed by development of new applications for DIC in composite manufacturing and inspection.

scholarly journals Digital image correlation for full-field time-resolved assessment of arterial stiffness

2014 ◽  
Vol 19 (1) ◽  
pp. 016008 ◽  
Author(s):  
Adriaan Campo ◽  
Joris Soons ◽  
Hilde Heuten ◽  
Guy Ennekens ◽  
Inge Goovaerts ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Arterial Stiffness ◽  
Digital Image ◽  
Image Correlation ◽  
Time Resolved ◽  
Full Field

scholarly journals Detection of Delamination in Polymer Composites by Digital Image Correlation—Experimental Test

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 523 ◽  
Author(s):  
Gábor Szebényi ◽  
Viktor Hliva
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Composite Structures ◽  
Image Correlation ◽  
Personal Safety ◽  
Compression Tests ◽  
Release Agent ◽  
Camera System ◽  
Full Field ◽  
Reinforced Polymer

Fiber-reinforced polymer composite structures are frequently used in industries where personal safety is critical; therefore, it is important to periodically estimate or monitor the condition of high value, load bearing structures. The digital image correlation (DIC) is well known as an effective method to obtain full field surface strains; in this paper, it was used to detect artificial damage inside the structures. Carbon or glass fabric reinforced epoxy specimens were produced and tested. All specimens contained an artificial through-delamination which was created by the insertion of different foils of a mould release agent during production. Tensile and compression tests were done while the camera system collected the images of the deformed surface to be analyzed posteriorly. In most cases the approximate locations of delaminations could be effectively detected from strain maps by the localization of zones showing different strain values than intact zones.

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