Letterbox Type Repair Weld Finite Element Simulation and Residual Stress Prediction

Finite element prediction of residual stresses in a 3-bead letterbox-type repair weld is investigated in the present study. The repair is performed on a 2¼CrMo low alloy ferritic steel plate, containing a machined central groove of 9mm depth, 200mm length and 14mm width. Three weld beads are deposited in the groove using AL CROMO S 225 2¼CrMo electrodes. The proposed simulation procedure, which is based on decoupled thermal and mechanical analyses and the “birth and death of elements” technique, is evaluated through comparison of predicted temperatures with recorded data during welding and of predicted stresses with neutron diffraction testing data. Parametric studies include modelling aspects such as 2-D plane strain versus 3-D analysis, re-melting of weld material during sequential bead deposition, melting of base plate near the fusion line and annealing. It is concluded that numerical results come, in general, in satisfied agreement with the experimental data.

KEPPAS Loukas;  KATSAREAS D.;  WIMPORY Robert;  ANIFANTIS N.K.;  YOUTSOS Anastasius; 

OHMS Carsten; 

2006-11-20

TRANS TECH PUBLICATIONS LTD

JRC34713

https://publications.jrc.ec.europa.eu/repository/handle/JRC34713,