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Thermo-mechanical modelling of the Wire Arc Additive Manufacturing process (WAAM)

Abstract : The proposed research work consists in setting up, calibrating and validating a model to simulate the WAAM process, aiming to predict residual stresses and distortions on 316 stainless steel industrial parts. A mesoscopic thermo-mechanical model is implemented using the finite element code Code_Aster. Simulations are carried out for various geometries and deposition strategies. The model requires the determination of input parameters, such as the parameters of the heat source, that can not be directly measured or characterized. In order to calibrate the model, instrumented experimental tests are conducted, using thermocouples, thermal imaging and 3D scan. A bayesian calibration based on a surrogate model approach is performed in order to fit the parameters of the thermal model. The finite element results are then compared to multiple test cases experimental data, and showed good agreement. Finally, different approaches are considered to reduce the calculation time for the simulation of large components. This work is part of the additive manufacturing platform “Additive Factory Hub” (AFH) involving French manufacturers and academics.
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https://pastel.archives-ouvertes.fr/tel-03868998
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Submitted on : Thursday, November 24, 2022 - 9:54:14 AM
Last modification on : Friday, November 25, 2022 - 3:53:05 AM

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  • HAL Id : tel-03868998, version 1

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Sami Hilal. Thermo-mechanical modelling of the Wire Arc Additive Manufacturing process (WAAM). Mechanics of materials [physics.class-ph]. Université Paris sciences et lettres, 2022. English. ⟨NNT : 2022UPSLM021⟩. ⟨tel-03868998⟩

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