Towards an automated framework for the finite element computational modelling of directed energy deposition

Kovšca, Dejan (avtor), Starman, Bojan (avtor), Klobčar, Damjan (avtor), Halilovič, Miroslav (avtor), Mole, Nikolaj (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: directed energy deposition, multi-pass welding, computational modelling, finite element method, thermo-mechanical analysis
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 12 str.
• Številčenje: Vol. 221, art. 103949
• PID: 20.500.12556/RUL-145657
• UDK: 621.791:519.61
• ISSN pri članku: 0168-874X
• DOI: 10.1016/j.finel.2023.103949
• COBISS.SI-ID: 150969347
• Datum objave v RUL: 05.05.2023

Gradivo je del revije

• Naslov: Finite elements in analysis and design
• Skrajšan naslov: Finite elem. anal. des.
• Založnik: Elsevier
• ISSN: 0168-874X
• COBISS.SI-ID: 579602

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: usmerjeno odlaganje energije, večprehodno varjenje, računalniška simulacija, metoda končnih elementov, termomehanska analiza

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0263
• Naslov: Mehanika v tehniki

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: L2-3172
• Naslov: Razvoj tehničnih smernic za štirislojne zasteklitve