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

0460897 - ÚGN 2017 RIV HR eng J - Journal Article
Milosevic, M. - Milosevic, N.J. - Sedmak, S. - Tatic, U. - Mitrovic, N. - Hloch, Sergej - Jovicic, R.
Digital image correlation in analysis of striffness in local zones of welded joints.
Technicki vjesnik - Technical Gazette. Roč. 23, č. 1 (2016), s. 19-24. ISSN 1330-3651. E-ISSN 1848-6339
Institutional support: RVO:68145535
Keywords : Aramis software * digital image correlation * strain analysis * stiffness * welded joints
Subject RIV: JQ - Machines ; Tools
Impact factor: 0.723, year: 2016
http://hrcak.srce.hr/file/225545

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.
Permanent Link: http://hdl.handle.net/11104/0260844