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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Joghan, Hamed Dardaei
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024On the Potential of Manufacturing Multi-Material Components with Micro/Nanocellular Structures via the Hybrid Process of Electromagnetic Forming Injection Foamingcitations
- 2024Characterization of resistance welded hybrid sandwich sheets with additively manufactured core structure
- 2023Effect of preheating during laser metal deposition on the properties of laminated bending diescitations
- 2023Resources and manufacturing technology evaluation of hybrid additive metal laminated tooling for formingcitations
- 2023Hybrid Additive Manufacturing of Forming Toolscitations
- 2019Effect of the unbending process on mechanical properties before and after flattening of extruded open tubes of magnesium alloy ME20
- 2018Investigation of the effects of process and geometrical parameters on formability in tube hydroforming using a modular hydroforming toolcitations
- 2018Tiefzieh- und Hinterspritzprozess für Kunststoff-Magnesium-Hybridecitations
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article
Characterization of resistance welded hybrid sandwich sheets with additively manufactured core structure
Abstract
<jats:title>Abstract</jats:title><jats:p>Production of additively manufactured sandwich sheets is limited to small sizes. In the new introduced process route, additively manufactured core structures are joined with rolled face sheets by resistance welding, and the formability of the hybrid sandwich sheets is investigated. The necessity of developing the humps to improve the quality of resistance welding is initially investigated. Two different core structures, namely honeycomb and hollow sphere, are selected, and electrical-thermal coupled simulations with the ABAQUS software are performed to study the temperature distribution during resistance welding without and with hump. The strength of the joints for the fabricated sandwich sheets is verified by a quasi-static shear test. It is experimentally proven that the sandwich sheets without a hump in the core structure are not fully joined, and desired temperature localization is possible only by applying the hump. This is because the hump reduces the contact area, which leads to an increase in current density at the point where the resistance ratios are changed. This leads to higher temperatures in the intended joining zone. Different hump geometries for the core structure are designed, fabricated, and joined to the face sheets under different process parameters. The spot contact yields up to 50% higher shear strength than the linear or area contact. The free air bending results show that the double weld is essential for successful subsequent bending. It is also concluded that increasing the resistance welding time by more than 120 ms does not affect the joining strength of hybrid sheets.</jats:p>