Thermomechanical finite element simulations of selective electron beam melting processes: Performance considerations

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Details zur Publikation

Autor(en): Riedlbauer DR, Steinmann P, Mergheim J
Zeitschrift: Computational Mechanics
Verlag: Springer Verlag (Germany)
Jahr der Veröffentlichung: 2014
Band: 54
Heftnummer: 1
Seitenbereich: 109-122
ISSN: 0178-7675
Sprache: Englisch


Abstract


The present contribution is concerned with the macroscopic modelling of the selective electron beam melting process by using the finite element method. The modelling and simulation of the selective electron beam melting process involves various challenges: complex material behaviour, phase changes, thermomechanical coupling, high temperature gradients, different time and length scales etc. The present contribution focuses on performance considerations of solution approaches for thermomechanically coupled problems, i.e. the monolithic and the adiabatic split approach. The material model is restricted to nonlinear thermoelasticity with temperature-dependent material parameters. As a numerical example a straight scanning path is simulated, the predicted temperatures and stresses are analysed and the performance of the two algorithms is compared. The adiabatic split approach turned out to be much more efficient for linear thermomechanical problems, i.e. the solution time is three times less than with the monolithic approach. For nonlinear problems, stability issues necessitated the use of the Euler backward integration scheme, and therefore, the adiabatic split approach required small time steps for reasonable accuracy. Thus, for nonlinear problems and in combination with the Euler backward integration scheme, the monolithic solver turned out to be more efficient. © 2014 Springer-Verlag Berlin Heidelberg.



FAU-Autoren / FAU-Herausgeber

Mergheim, Julia PD Dr.
Professur für Computational Mechanics
Riedlbauer, Daniel-Rouven
Department Maschinenbau
Steinmann, Paul Prof. Dr.-Ing.
Lehrstuhl für Technische Mechanik


Zitierweisen

APA:
Riedlbauer, D.-R., Steinmann, P., & Mergheim, J. (2014). Thermomechanical finite element simulations of selective electron beam melting processes: Performance considerations. Computational Mechanics, 54(1), 109-122. https://dx.doi.org/10.1007/s00466-014-1026-0

MLA:
Riedlbauer, Daniel-Rouven, Paul Steinmann, and Julia Mergheim. "Thermomechanical finite element simulations of selective electron beam melting processes: Performance considerations." Computational Mechanics 54.1 (2014): 109-122.

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Zuletzt aktualisiert 2018-12-07 um 14:23

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