Naslov
Damage quantification in fiber reinforced polymer via Digital Volume Correlation

Autori
Vrgoč, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
Eighth Annual PhD Workshop, PhD study of Mechanical Engineering, Naval Architecture, Aeronautical Engineering and Metallurgical Engineering, Book of Abstracts / Jokić, Andrej ; Ivanić, Ivana ; Bauer, Branko ; Degiuli, Nastia ; Duić, Neven ; Hegedić, Miro ; Landek, Darko ; Lulić, Zoran ; Matijević, Božidar ; Parunov, Joško ; Runje, Biserka ; Tonković, Zdenko ; Terze, Zdravko (ur.). - Zagreb, 2022, 68-68

Skup
8th PhD Workshop: PhD study of Mechanical Engineering, Naval Architecture and Metallurgical Engineering

Mjesto i datum
Zagreb, Hrvatska, 04.07.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Glass fiber reinforced polymer ; Damage ; Digital Volume Correlation ; Gray level residuals
(Glass fiber reinforced polymer ; Damage ; Digital Volume Correlation ; Gray l)

Sažetak
Due to their advantageous properties (compared to conventional engineering materials), the application of fiber reinforced polymers (FRPs) is in constant growth. The heterogeneous nature of such materials induces the occurrence of various damage mechanisms on different scales. Coupling X- ray Computed Tomography (XCT) mechanical experimental tests with Digital Volume Correlation (DVC) allows for in-situ full-field displacement measurements and calculation of strain maps in 3D space. Furthermore, global approaches to DVC based on finite element (FE) discretizations perform registrations over the entire Region of Interest (ROI) by assuming the continuity of the displacement fields. The key ad-vantage of such approaches is the availability of correlation residuals corresponding to the gray level difference between the reference volume and the volume of the deformed material corrected by the measured displacement fields. The quality of the measured kinematics is evaluated from the correlation residual maps, as the high values reveal local violations to the gray level conservation (being the underlying hypothesis of DVC). Thus, employing glob-al approaches provides the opportunity to assess in-situ damage processes within the investigated materials. The present work aims to analyze strained band activity and damaged zones, as well as their interplay within a glass fiber mat reinforced polyester resin. FE- based DVC was employed to measure 3D bulk kinematics. As DVC assumes gray level conservation, correlation residuals serve as a correlation quality inspection tool, as well as provide information crucial for observation, identification, and quantification of damage growth. Furthermore, such an analysis enables the changes in microstructure within the observed damage zones to be correlated with DVC results.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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