DIGITAL IMAGE CORRELATION BY MESOCOS

KNOWLEDGE, EXPERIENCE, PRECISION

Our cooperation started several years ago when working as Ph.D. students at the Faculty of Civil Engineering, CTU in Prague on projects dealing with numerical modeling and, luckily, being involved in experimental analysis to verify our models.
 

At that time, digital image correlation (DIC) captured our attention for the capabilities far beyond conventional measurement techniques. The full-field monitoring of strains and displacements allowed to reveal the phenomena we observed in the predictions of our numerial models. The method intrigued us and we decided to develop own software and methodology in order to cope with challenging tasks. The passion for DIC, experimental measurements and control systems yielded outputs of a high academic value, including software packages or peer-reviewed papers.

 NEW! Take photos during your experiment and we will do DIC for you. Click here to learn more about our on-line services and free DIC Viewer software.

OUR SOLUTIONS

We provide complete DIC measurement and analysis - from the acquisition of images to postprocessing of results. In your lab, or wherever else.

DIC became indispensable when monitoring and analyzing the development of displacement or strain fields in time, on a surface of a loaded structure or specimen. The method is capable of capturing strain localization (such as plasticity or cracking) in any direction. It is not limited to a relative measurement of discrete points as conventional contact methods and appears to be more accurate than monitoring by means of extensometers or strain-gauges that often suffer from imperfect attachment to the measured surface. Moreover, the use of the DIC tools can significantly reduce the cost of the experiment.

To find a detailed information about the DIC algorithms, benchmarking, and our projects please opend the pdf document below.

RECENT PROJECTS

Cracking of fiber reinforced concrete

Conventional contact strain measurement methods cannot be used for monitoring of the development of smeared cracks on the surface of fiber-reinforced composites (FRC) because of their unpredictable location, direction and development. Therefore, DIC was employed when investigating such cracking at very low strain levels in FRC specimens subjected to shear loading. The DIC results confirmed the theoretical outcomes and clearly revealed the multiple cracking and strain-hardening behavior of the properly designed HPC composites.

Investigation of masonry failure mechanism

The traditional design of masonry structures, based on rules-of-thumb, has been replaced by the numerical approach to address their complex failure mechanisms. However, the simulations must be verified through an extensive experimental analysis to show the capabilities and limitations of the mathematical model. DIC allowed to compare the predicted and observed failure modes, and to evaluate the force-displacement diagrams with a high accuracy compared to extensometers that suffered from improper attachment and insufficient measuring range.

Large-strain analysis of gypsum board

Gypsum boards exhibit quite unpredictable failure behavior due to orthotropy resulting from the technological processes during their productions. DIC allowed to reveal the multiple cracking as the first-stage failure mechanism when the gympsum boards were subjected to four-point bending. Therefore, the boards lost their stiffness and the complete failure followed, resulting from the development of a major crack passing through the surface paper-based layers.

Large surface monitoring of timber beam

A purpose of the analysis was, beside conventional deflection measurements, to investigate the normal and shear strain distribution within cross-sections of glued-laminated timber beams subjected to four point bending. Because the tested beams were relatively long (exceeding 4.5 m), the monitoring had to be accomplished using two cameras per a single beam face. A special software allowed to find the relationship between the strains and properties of individual lamellas.

OUR CLIENTS

Charles University     UCEEB     CTU in Prague     RLE     Hong Kong University

CONTACT US

Being a dynamic team of scientists / engineers we are keen to accept challenges and join new projects.
If you are interested in our services, do not hesitate and leave us a message.