PSI - Issue 64

Julian Unglaub et al. / Procedia Structural Integrity 64 (2024) 918–924 Julian Unglaub / Structural Integrity Procedia 00 (2019) 000–000

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Fig. 2. Test setup for welding tests under moving seam flanks with measuring equipment, Begemann et al. (2024).

3.1. Material and Setup The welds are carried out on sheet material made of S355J2+N with a thickness of 12 mm. A rutile wire (Ø1.2 mm) with the standard designation T 46 4 P M 1 H5 was used as filler metal. The shielding gas used was an M21 with a composition of 82% argon and 18% CO 2 at 13 l/min. MAG filler wire welding is used as the welding process. The AMT Hybrid 4000 MR MIG/MAG was used as welding power source. In order to guarantee the quality of the weld seam, the welding parameters in accordance with the WPS were recorded using an HKS weld scanner. These parameters included wire feed speed (8 m/s), current (210-230 A), voltage (23-24 V), welding speed (20-40 cm/min), and interpass temperature (<230 ° C). The welding was conducted by personnel with the requisite qualifications and experience in the bridge construction industry Begemann et al. (2024). Fig. 2 shows the implemented test setup, which allows multilayer welding at both sides under cyclic loads. The seam flank movement is achieved via a slide mechanism, enabling the upper test specimen to move via a servo hydraulic cylinder during the welding tests. To this end, the slide is mounted on two roller rails, ensuring the parallelism of the seam flanks and simultaneously absorbing any misalignment moments resulting from the force eccentricities between the hydraulic cylinder and the load transmission at the weld seam during the welding process. The test setup is equipped with a 1.2 MN force sensor, an LVDT displacement sensor and two displacement sensors based on eddy current. The test setup incorporates the load train, which houses both a force sensor and an LVDT