20.500.12556/RUL-145657 Towards an automated framework for the finite element computational modelling of directed energy deposition In the present work, a comprehensive framework for finite element-based computational modelling of Directed Energy Deposition (DED) process is presented. The proposed approach can be fully automated and implemented on a complex real-life part geometry to accurately predict a thermo-mechanical response during the full-scale deposition process. The discrete material deposition modelling in Finite Element Analysis (FEA) leads to artificial increases in temperature gradients in the melt pool domain. A new method is therefore proposed that aims to mitigate these gradients. Additionally, an easy-to-implement free-surface detection algorithm to accurately prescribe the evolving heat transfer boundary conditions is presented. A three-dimensional sequentially coupled thermo-mechanical model of the process is then validated against experimental data obtained in a deposition case study. The simulation results show good agreement with the in-situ temperature measurements taken during the actual deposition. In addition, result analysis showed that the largest tensile residual stresses form in the hoop and axial direction on the outer domain of the thin-wall cylindrical part near the base plate while the inward material is compressed. directed energy deposition multi-pass welding computational modelling finite element method thermo-mechanical analysis usmerjeno odlaganje energije večprehodno varjenje računalniška simulacija metoda končnih elementov termomehanska analiza true false true Angleški jezik Slovenski jezik Članek v reviji 2023-05-05 06:34:11 2023-05-05 06:34:21 2023-10-24 03:30:28 0000-00-00 00:00:00 2023 0 0 12 str. Vol. 221, art. 103949 Sep. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791:519.61 0168-874X 10.1016/j.finel.2023.103949 150969347 Kovsca_..._-_Towards_an_automated_framework_for_the_finite_element_computational_modelling_of_directed_energy_deposition.pdf Kovsca_..._-_Towards_an_automated_framework_for_the_finite_element_computational_modelling_of_directed_energy_deposition.pdf 1 7813A3C9DB61F02C2BE656EE69FA5E9E 423ee25cf3c00c1f155c90729456d34f0fad599154cb76358a2aee82aef69f01 d2ef3bdd-eafe-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168620 https://www.sciencedirect.com/science/article/pii/S0168874X23000422 1 e4ee25b6-eafd-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168619 Fakulteta za strojništvo 0 0 0