TY - GEN A1 - Ermilova, Evgeniia A1 - Kazak, Fedor A1 - Weiß, Sabine T1 - Stability of structured sheet metals during buckling T2 - Materials Testing N2 - Structured materials can be a progressive alternative to commonly used flat sheets. There is an enormous range of possibilities for using structured sheet metals due to their better stability. However, the effective use of these materials as well as their implementation in production requires precise knowledge about specific properties of structured sheet metals. The aim of this work is to obtain new knowledge about stiffness and stability during the deformation of this material. The structured sheet metals were investigated by means of buckling tests. The steel type investigated is a commonly used deep-drawing steel DC04. Six types of structure arrangements were compared to non-structured (flat) specimens as a reference. The influence of the type of structure arrangement as well as the deformation speed on the mechanical properties was investigated. KW - Structured metals KW - flat sheet metals KW - buckling test KW - stiffness KW - stability Y1 - 2019 UR - https://www.hanser-elibrary.com/doi/10.3139/120.111403 U6 - https://doi.org/10.3139/120.111403 SN - 2195-8572 SN - 0025-5300 VL - 61 IS - 10 SP - 929 EP - 935 ER - TY - GEN A1 - Ermilova, Evgeniia A1 - Nikitin, Alexander A1 - Weiß, Sabine ED - Daehn, Glenn ED - Cao, Jian ED - Kinsey, Brad ED - Tekkaya, A. Erman ED - Vivek, Anupam ED - Yoshida, Yoshinori T1 - The Local Strain Evolution for Structured Sheet Metals During Uniaxial Deformation T2 - Forming the Future : Proceedings of the 13th International Conference on the Technology of Plasticity N2 - Structured materials can be progressive alternatives to commonly used flat sheets because of their higher bending stiffness and stability compared to flat sheet metals, made of the same alloy. The application of sheet metals requires accurate information regarding their strength and deformation behavior. Such data are not commonly available and have to be measured by specific test setups and implementation of tests. The aim of this work is to obtain new knowledge about deformation mechanisms of structured sheet metals. Structured sheet metals (SSM) made of conventional deep-drawing steel DC04 were investigated by means of tensile tests. The influence of the structure type arrangement on the deformation behavior was analyzed. The evolution of local strains was analyzed by means of strain gauge measurements as well as 3D-displacement measurements with an ARAMIS highresolution camera system. Local orientation changes in different structural elements were measured using the electron backscatter diffraction technique. KW - structured sheet metals, ssm, tensile test, ARAMIS, strain gauge, EBSD, REM, electron microscopy, DC04 steel Y1 - 2021 SN - 978-3-030-75381-8 SN - 978-3-030-75380-1 SN - 978-3-030-75383-2 U6 - https://doi.org/10.1007/978-3-030-75381-8_143 SN - 2367-1696 SP - 1701 EP - 1711 PB - Springer, Cham ET - 1 ER - TY - GEN A1 - Nikitin, Alexander A1 - Turabov, Dashqin A1 - Ermilova, Evgeniia A1 - Evdokimov, Anton A1 - Ossenbrink, Ralf A1 - Seidlitz, Holger T1 - Using dynamic resistance to predict electrode surface degradation in resistance spot welding of 5182 aluminum alloy T2 - Welding in the World N2 - In this study, the correlation between dynamic resistance during the first 10 ms of welding time and the electrode surface condition in resistance spot welding of 5182 aluminum alloy has been investigated. The electrode surface rapidly degrades due to contamination and morphological changes, adversely affecting the weld spot surface. The accumulation of Cu-Al intermetallic phases on the electrode surface alters its roughness, leading to variations in dynamic resistance. By analyzing this correlation, optimal electrode milling intervals were identified to extend electrode life. This work focused on detecting crater formation on the electrode surface through dynamic resistance monitoring. The results indicate that resistance measurements provide a reliable approach for evaluating electrode wear, optimizing maintenance schedules, and reducing material removal during milling. KW - resistance spot welding KW - aluminum alloy KW - electrode wear KW - dynamic resistance KW - electrode surface Y1 - 2024 U6 - https://doi.org/10.1007/s40194-024-01872-9 VL - 69 SP - 449 EP - 458 ER -