Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint

Sedmak, Aleksandar; Doncheva, Elisaveta; Medjo, Bojan; Rakin, Marko; Milosevic, Nenad; Radu, Dorin

doi:10.3390/ma16134858

Open AccessArticle

Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint

by

Aleksandar Sedmak

^1,2

,

Elisaveta Doncheva

³,

Bojan Medjo

⁴

,

Marko Rakin

⁴

,

Nenad Milosevic

^1,*

and

Dorin Radu

²

¹

Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia

²

Faculty of Civil Engineering, Transilvania University of Brașov, Turnului Street 5, 500152 Brașov, Romania

³

Faculty of Mechanical Engineering, University of Skopje, Boulevard 8-mi Septemvri, 1000 Skopje, North Macedonia

⁴

Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia

^*

Author to whom correspondence should be addressed.

Materials 2023, 16(13), 4858; https://doi.org/10.3390/ma16134858

Submission received: 19 May 2023 / Revised: 28 June 2023 / Accepted: 3 July 2023 / Published: 6 July 2023

(This article belongs to the Section Manufacturing Processes and Systems)

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Abstract

Crack size and undermatching effects on fracture behavior of undermatched welded joints are presented and analyzed. Experimental and numerical analysis of the fracture behavior of high-strength low-alloyed (HSLA) steel welded joints with so-called small and large crack in undermatched weld metal and the base metal was performed, as a part of more extensive research previously conducted. J integral was determined by direct measurement using special instrumentation including strain gauges and a CMOD measuring device. Numerical analysis was performed by 3D finite element method (FEM) with different tensile properties in BM and WM. Results of J-CMOD curves evaluation for SUMITEN SM 80P HSLA steel and its weld metal (WM) are presented and analyzed for small and large cracks in tensile panels. This paper is focused on some new numerical results and observations on crack tip fields and constraint effects of undermatching and crack size keeping in mind previously performed experiments on the full-scale prototype. In this way, a unique combined approach of experimental investigation on the full-scale proto-type and tensile panels, as well as numerical investigation on mismatching and crack size effects, is achieved.

Keywords: welded joint mismatching; crack tip fields; finite element method

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MDPI and ACS Style

Sedmak, A.; Doncheva, E.; Medjo, B.; Rakin, M.; Milosevic, N.; Radu, D. Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint. Materials 2023, 16, 4858. https://doi.org/10.3390/ma16134858

AMA Style

Sedmak A, Doncheva E, Medjo B, Rakin M, Milosevic N, Radu D. Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint. Materials. 2023; 16(13):4858. https://doi.org/10.3390/ma16134858

Chicago/Turabian Style

Sedmak, Aleksandar, Elisaveta Doncheva, Bojan Medjo, Marko Rakin, Nenad Milosevic, and Dorin Radu. 2023. "Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint" Materials 16, no. 13: 4858. https://doi.org/10.3390/ma16134858

APA Style

Sedmak, A., Doncheva, E., Medjo, B., Rakin, M., Milosevic, N., & Radu, D. (2023). Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint. Materials, 16(13), 4858. https://doi.org/10.3390/ma16134858

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Crack Size and Undermatching Effects on Fracture Behavior of a Welded Joint

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