Accuracy of computational welding mechanics methods for estimation of angular distortion and residual stresses
Artikel i vetenskaplig tidskrift, 2019

This study estimates the angular distortion and residual stresses due to welding using the following methodologies: thermo-elastic-plastic, inherent strain (local-global), and substructuring on two types of welded joints (T-type fillet weld and butt weld). The numerical results are compared with the experimental measurements and these methodologies are evaluated in terms of accuracy and computational time. In addition, the influence of welding sequence on distortion and transverse residual stresses has been studied numerically by implementing the thermo-elastic-plastic and inherent strain (local-global) methods on the T-type fillet weld. For the T-type fillet weld, the estimated angular distortion from these methods is much the same and in good agreement with the experimental measurements. For the butt weld, the angular distortion calculated by the inherent strain (local-global) method is largely underestimated. In order to gain a better understanding of where the underestimation of angular distortion in the inherent strain (local-global) method comes from, the study discusses the influence of block length and welding speed on angular distortion. It is found that for long weld length or slow welding speed, activating the plastic strain gradually by dividing the weld bead into an appropriate number of blocks can reduce the level of underestimation of angular distortion.

Angular distortion

Inherent strain

Thermo-elastic-plastic

Substructuring

Residual stresses

Författare

J. Zhu

Kungliga Tekniska Högskolan (KTH)

M. Khurshid

Kungliga Tekniska Högskolan (KTH)

Cargotec Sweden AB Bromma Conquip

Zuheir Barsoum

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Welding in the World, Le Soudage Dans Le Monde

0043-2288 (ISSN)

Vol. 63 5 1391-1405

Ämneskategorier

Teknisk mekanik

Bearbetnings-, yt- och fogningsteknik

Farkostteknik

DOI

10.1007/s40194-019-00746-9

Mer information

Senast uppdaterat

2019-10-18