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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rosenthal, Stephan
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Topics
Publications (11/11 displayed)
- 2024Characterization of resistance welded hybrid sandwich sheets with additively manufactured core structure
- 2023Deep drawability of additively manufactured sheets with a structured corecitations
- 2023Correction to: Deep drawability of additively manufactured sheets with a structured core
- 2022Speeding up additive manufacturing by means of forming for sheet components with core structurescitations
- 2021Coin minting by additive manufacturing and formingcitations
- 2021Incremental sheet-bulk metal forming by application of thermal-controlled grading mechanisms
- 2021Combined computed tomography and numerical modeling for the analysis of bending of additively manufactured cellular sheets
- 2020Hybrid Additive Manufacturing of Collector Coinscitations
- 2020Lightweight in Automotive Components by Forming Technologycitations
- 2019Forming properties of additively manufactured monolithic Hastelloy X sheetscitations
- 2019Simulation approach for three-point plastic bending of additively manufactured Hastelloy X sheetscitations
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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>