20.500.12556/RUL-159947 On experimental determination of Poisson’s ratio for rock-like materials using digital image correlation O eksperimentalnem določanju Poissonovega količnika za kamninam podobne materiale z uporabo korelacije digitalne slike (DIC) This article compares the two most used strain determination experimental techniques, the strain gauges and the digital image correlation (DIC), which are used here to determine the static Poisson's ratio of rock-like materials under a compressive loading. While the strain gauge technique measures the strains on the small patch of the underlying material on the spot, where the strain gauge is applied, DIC is a novel optical full-field technique that can measure the strains over the entire region of interest of the specimen. The key research question presented in this paper and research significance is to what extent the measurement of Poisson’s ratio is improved by leveraging the richness of the full-field measurements compared to the conventional strain gauge technique. To this purpose, the hypothesis was tested through virtual experiments in which a numerical simulation of a uniaxial compression test with a cylindrical, rock-like sample was created to mimic the strain gauge and DIC measurement techniques, as well as by conducting an actual compression test on a sandstone material. In contrast to conventional strain gauges, novel optical techniques such as stereo DIC proved to be able to capture the macroscopic Poisson coefficient with higher precision, thus reducing the margin of error. Poisson’s ratio digital image correlation strain gauge rock-like materials uniaxial compression Poissonov količnik korelacija digitalnih slik merilni lističi materiali kot kamnine enoosni tlačni testi true false true Angleški jezik Slovenski jezik Članek v reviji 2024-08-01 07:57:29 2024-08-01 07:57:34 2024-08-23 13:54:16 0000-00-00 00:00:00 2024 0 0 Str. 211-222 no. 5/6 Vol. 70 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.942:539.3:620.1 0039-2480 10.5545/sv-jme.2024.966 201992451 Koc_-_On_Experimental_Determination_of_Poisson’s_Ratio_....pdf Koc_-_On_Experimental_Determination_of_Poisson’s_Ratio_....pdf 1 05AD5B4149EF7CA34B5919EE9295E431 befe0e53458e776672b5b93bba4d342452488fe06883160f5d1964fad9e03a2a 948d378c-4fcd-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=188204 https://www.sv-jme.eu/sl/article/on-experimental-determination-of-poissons-ratio-for-rock-like-materials-using-digital-image-correlation/ 1 d6661502-4fca-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=188199 Fakulteta za strojništvo Fakulteta za matematiko in fiziko Strojniški vestnik 0 0 0