Numerical modeling of the electron beam welding and its experimental validation

Autor: C. Agelet de Saracibar, B. Wu, L. Jinwei, Miguel Cervera, Narges Dialami, Michele Chiumenti
Přispěvatelé: Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria
Rok vydání: 2016
Předmět:
0209 industrial biotechnology
Work (thermodynamics)
Engineering
Engineering
Civil
Plasticity
Mechanical engineering
Engineering
Multidisciplinary
02 engineering and technology
Welding
Enginyeria civil::Materials i estructures::Materials i estructures metàl·liques [Àrees temàtiques de la UPC]
Electron Beam Welding (EBW)
law.invention
020901 industrial engineering & automation
law
Residual stress
Soldadura
Electron beam welding
Engineering
Ocean
Thermo-mechanical
Phase-change
Engineering
Aerospace
Engineering
Biomedical
Computer simulation
business.industry
Applied Mathematics
General Engineering
021001 nanoscience & nanotechnology
Thermal conduction
Computer Science
Software Engineering
Computer Graphics and Computer-Aided Design
Finite element method
Engineering
Marine
Engineering
Manufacturing
Engineering
Mechanical
Engineering
Industrial
Vacuum chamber
0210 nano-technology
business
Analysis
Zdroj: Scipedia Open Access
Scipedia SL
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
Popis: Electron Beam Welding (EBW) is a highly efficient and precise welding method increasingly used within the manufacturing chain and of growing importance in different industrial environments such as the aeronautical and aerospace sectors. This is because, compared to other welding processes, EBW induces lower distortions and residual stresses due to the lower and more focused heat input along the welding line.This work describes the formulation adopted for the numerical simulation of the EBW process as well as the experimental work carried out to calibrate and validate it.The numerical simulation of EBW involves the interaction of thermal, mechanical and metallurgical phenomena. For this reason, in this work the numerical framework couples the heat transfer process to the stress analysis to maximize accuracy. An in-house multi-physics FE software is used to deal with the numerical simulation. The definition of an ad hoc moving heat source is proposed to simulate the EB power surface distribution and the corresponding absorption within the work-piece thickness. Both heat conduction and heat radiation models are considered to dissipate the heat through the boundaries of the component. The material behavior is characterized by an apropos thermo-elasto-viscoplastic constitutive model. Titanium-alloy Ti6A14V is the target material of this work.From the experimental side, the EB welding machine, the vacuum chamber characteristics and the corresponding operative setting are detailed. Finally, the available facilities to record the temperature evolution at different thermo-couple locations as well as to measure both distortions and residual stresses are described. Numerical results are compared with the experimental evidence. HighlightsFully coupled thermo-mechanical analysis of the EB welding process.Accurate description of the moving heat source used for the analysis.FE technology suitable for isochoric behavior of both the liquid-like and plastic deformation of the solid phases.Continuous transition model from room temperature to (and above) the melting point.Experimental validation of the model carried out the authors of the paper by using the facilities at BAMTRI labs.
Databáze: OpenAIRE
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