Digital image correlation-based experimental analysis of cantilever specimen

Diplomski rad bavi se tematikom konstrukcije i analize ispitnih uzoraka sa i bez koncentratora naprezanja. Analiza ispitnih uzoraka provedena je analitičkom i numeričkom metodom te primjenom metode korelacije digitalne slike. Prije početka analize uzoraka eksperimentalno je određena vrijednost modula elastičnosti materijala izrade uzoraka – ABS. Analitički dio analize sastoji se od izračuna deformacije, naprezanja i progiba uzoraka pri čemu je progib izračunat samo za uzorak bez koncentratora naprezanja. Analiza numeričkom metodom sastoji se od izrade pojednostavljenog modela konzolno opterećenog uzorka te definiranja rubnih uvjeta u programskom paketu Autodesk Inventor. Numeričkom metodom dobivene su vrijednosti naprezanja, deformacije i progiba uzoraka. Rezultati analitičke i numeričke analize provjereni su primjenom metode korelacije digitalne slike tako što su se uzorci konzolno ukliještili na za to predviđenu napravu te su se opteretili utegom od 5 kg. U konačnici je napravljena analiza i usporedba rezultata dobivenih navedenim metodama.The thesis deals with the topic of construction and analysis of test specimens with and without stress concentrators. The analysis of test samples was performed by analytical and numerical methods and by applying the digital image correlation method. Before starting the analysis of the samples, the value of the modulus of elasticity of the material of the samples - ABS was experimentally determined. The analytical part of the analysis consists of the calculation of deformation, stress and deflection of the samples, where the deflection is calculated only for the sample without the stress concentrator. Numerical analysis consists of creating a simplified model of a cantilever-loaded sample and defining boundary conditions in the Autodesk Inventor software. Using the numerical method, the values of stress, strain and deflection of the samples were obtained. The results of the analytical and numerical analysis were verified by applying the digital image correlation method by clamping the specimens cantilevered on a device designed for this purpose and loading them with a weight of 5 kg. Finally, the results obtained using the aforementioned methods were analysed and compared