30 - APPLICATION OF THERMOMECHANICAL MODEL FOR DED PROCESS SIMULATION
Abstract
Efficient application of the thermomechanical model for part-scale DED is still a challenging task. Meso-scale methods are accurate but cannot be employed for large-part applications due to impractical computation time. Multi-scaling models, especially the Inherent Strain (IS) based method are highly efficient for PBF. However, in its current methodology, the IS method has been found inaccurate for large-part applications. For the past few years, there has been extensive research going on to find an accurate way to calculate inherent strains for DED, but to this day, nothing concrete has been developed. Finally, Macro-scale models that consider layer-by-layer deposition are used for PBF, but somehow it has not been investigated in detail for DED. Therefore, in the present work, a macro-scale thermomechanical model is developed on COMSOL Multiphysics®. The proposed model employs an efficient thermal cycle (ETC) that results in thermal expansion and shrinkage phenomenon. Several part designs are fabricated by the Laser DED process at IREPA LASER. In-situ and post-process measurements are done to extract the temperature and deformation data. The experiment data is then used to compare the proposed model’s predictions and make it possible to demonstrate the performance of the simulation. The proposed model effectively captures the thermomechanical response of the fabricated parts and this new tool is suitable even for large part simulation.
Speaker
Vaibhav Nain
Discover speaker profileIREPA LASER, Illkirch-Graffenstaden, France
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30 - APPLICATION OF THERMOMECHANICAL MODEL FOR DED PROCESS SIMULATION
Date/Time
20/03/2024
11:35 am -11:55 am
Location
Room 8