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Variation simulation of welded assemblies using a thermo-elastic finite element model

Samuel Lorin (Institutionen för produkt- och produktionsutveckling, Produktutveckling) ; Christoffer Cromvik ; Fredrik Edelvik ; Lars Lindkvist (Institutionen för produkt- och produktionsutveckling, Produktutveckling) ; Rikard Söderberg (Institutionen för produkt- och produktionsutveckling, Produktutveckling)
Proceedings of the ASME 2013 International Mechanical Engineering Congress & Exposition IMECE2013 (2013)
[Konferensbidrag, refereegranskat]

Every series of manufactured products has geometric variation. Variation can lead to products that are difficult to assemble or products not fulfilling functional or aesthetical requirements. In this paper, we will consider the effects of welding in variation simulation. Earlier work that have been combining variation simulation with welding simulation have either applied distortion based on nominal welding conditions onto the variation simulation result, hence loosing combination effects, or have used transient thermo-elasto-plastic simulation, which can be very time consuming since the number of runs required for statistical accuracy can be high. Here, we will present a new method to include the effects of welding in variation simulation. It is based on a technique that uses a thermo-elastic model, which previously has been shown to give distortion prediction within reasonable accuracy. This technique is suited for variation simulations due to the relative short computation times compared to conventional transient thermo-elasto-plastic simulations of welding phenomena. In a case study, it is shown that the presented method is able to give good predictions of both welding distortion and variation of welding distortions compared to transient thermo-elasto-plastic simulations.

Nyckelord: variation simulation, welding simulation, volumetric shrinkage.



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Denna post skapades 2013-12-19. Senast ändrad 2015-12-17.
CPL Pubid: 190098

 

Institutioner (Chalmers)

Institutionen för produkt- och produktionsutveckling, Produktutveckling

Ämnesområden

Produktion
Annan teknik

Chalmers infrastruktur