Original scientific paper

https://doi.org/10.17559/TV-20140123151546

Digital image correlation in analysis of stiffness in local zones of welded joints

Milos Milosevic ; University of Belgrade, Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Nenad Milosevic ; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Simon Sedmak orcid.org/0000-0002-2674-541X ; University of Belgrade, Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Uros Tatic ; University of Belgrade, Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Nenad Mitrovic orcid.org/0000-0001-9296-2669 ; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Sergej Hloch ; Institute of Geonics Academy of Sciences of the Czech Republic, Ostrava Poruba, Studentska 1768, 708 00 Ostrava-Poruba, Czech Republic
Radomir Jovicic ; University of Belgrade, Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia

Abstract

The behaviour of welded joints in local zones, as well as their mutual influence, represents one of the main challenges in welded structure design. Namely, the main issue lies in determining the mechanical properties of materials in a welded joint. These properties are necessary for an accurate calculation of welded structure integrity. The possibility of obtaining local strain/displacement values makes the "Digital Image Correlation" (DIC) technique suitable for welded joint testing and determining of mechanical properties. In this paper a tensile testing machine was used for loading and a two camera system was used for 3D strain analysis. A specimen with parallel sides, obtained by welding of a V joint was used. Calibration was performed prior to testing, in order to ensure dimensional consistency of the system. Application of DIC technique using Aramis software for measuring local displacement/strain in a welded joint is presented in this paper. Due to tension in the V-weld specimen (Base material - S235JRG2, electrode wire - VAC 60), mutual influence of mechanical properties of local zones is present, wherein the root weld had the highest stiffness.

Keywords

Aramis software; Digital Image Correlation; strain analysis; stiffness; welded joints

Hrčak ID:

153151

URI

https://hrcak.srce.hr/153151

Publication date:

19.2.2016.

Article data in other languages: croatian

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