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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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Aigner, Roman
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2020Areal fatigue strength assessment of cast aluminium surface layerscitations
- 2019On the mean stress sensitivity of cast aluminium considering imperfectionscitations
- 2019Numerical Fatigue Analysis of Induction-Hardened and Mechanically Post-Treated Steel Componentscitations
- 2019Characterising the fatigue strength of aluminium castings by applied statistical evaluation of imperfections
- 2019On the Statistical Size Effect of Cast Aluminiumcitations
- 2019Short and long crack growth of aluminium cast alloyscitations
- 2018Application of a area -Approach for Fatigue Assessment of Cast Aluminum Alloys at Elevated Temperaturecitations
- 2018Local fatigue strength assessment of induction hardened components based on numerical manufacturing process simulationcitations
- 2018Lifetime assessment of cast aluminium components based on CT-evaluated microstructural defects
- 2018Fatigue strength characterization of Al-Si cast material incorporating statistical size effectcitations
- 2018Modification of a Defect-Based Fatigue Assessment Model for Al-Si-Cu Cast Alloyscitations
- 2016Aufbau einer numerischen Simulationskette für induktionsgehärtete Randschichten
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document
Aufbau einer numerischen Simulationskette für induktionsgehärtete Randschichten
Abstract
The aim of this thesis is to develop a linked simulation chain, which allows a numerical analysis of the induction hardening process. Based on the simulation model parameters, comprehensive studies regarding inductor geometry, required frequencies as well as inductor currents and material properties of the sample are performed. Through this analysis, statements of the resulting metallurgical properties, as wellas of the residual stress and hardness condition in the surface layer of the component, are enabled. This reduces time and cost effort for extensive test sequences significantly. The simulation of the inductive electro-magnetic-thermal heating process is carried out by means of a multiphysical software package. The subsequent thermo-mechanical-metallurgical cooling process including phase changes, distortion, hardness and residual stress distribution is modelled with the aid of the program Sysworld®. Due to the investigated complex sample shape, it is necessary to implement a so-called SDF (Simultaneous Dual Frequency) technology in the electro-magnetic-thermal numerical simulation in which the workpiece is simultaneously charged by a high and a medium-frequency inductor. The subsequent numerical simulation of thermo-mechanical-metallurgical cooling process is optimized in order to perform a parameter study of the cooling conditions by an adaptation of the input card. Furthermore, additional scripts are generated to ensure the data transfer between the two programs, which automate both an evaluation of the temperature distribution as well as the resulting adaptations of the simulation parameters. Finally, the numerically determined, local properties are compared with measured data and thus validates the linked simulation experimentally. The numerically determined boundary layer properties serve as a database for structural durability assessments of induction hardened components. Therefore, this methodology contributes significantly to the efficiency of the design process of case-hardened components.