Numerical simulation of dissimilar weld joint in SYSWELD simulation software

Abstract

NUMERICAL SIMULATION OF DISSIMILAR WELD JOINT IN SYSWELD SIMULATION SOFTWARE Radoslav Koňár, Marek PatekOriginal scientific paper Dissimilar weld joints are prone to frequent failures caused by many factors. Several methods might be used for prediction of the failures, from which prediction of the residual stresses and weld joint hardness plays a very important role. During the construction design, there is a possibility to predict residual stress by welding numerical simulation that may serve as the failure prevention. In presented article, residual stresses of dissimilar X5CrNi18-10/S355J2H weld joint were predicted by SYSWELD software after optimization of welding process by experimentally obtained thermal behaviour. The hardness wizard tool of the programme was employed for prediction of the weld joint hardness. Keywords: dissimilar weld; hardness prediction; residual stress; SYSWELD; temperature fieldNumerička simulacija zavarenog spoja od različitih materijala u simulacijskom programu SYSWELD Izvorni znanstveni članak Zavareni spojevi od različitih materijala podliježu čestim kvarovima zbog raznih faktora. Postoji nekoliko metoda koje se mogu primijeniti za predviđanje kvarova, a među njima vrlo važnu ulogu ima predviđanje zaostalih naprezanja i tvrdoće zavara. Tijekom dizajniranja konstrukcije, postoji mogućnost predviđanja zaostalog naprezanja numeričkom simulacijom varenja koja može služiti za prevenciju kvara. U ovom radu zaostala naprezanja zavarenog spoja X5CrNi18-10/S355J2H od različitih materijala predviđena su programom SYSWELD nakon optimizacije postupka zavarivanja eksperimentalno dobivenim toplinskim ponašanjem. Čudesni alat za tvrdoću iz tog programa upotrjebljen je za predviđanje tvrdoće zavarenog spoja.Ključne riječi: predviđanje tvrdoće; SYSWELD; temperaturno područje; zaostalo naprezanje; zavar od različitih materijala

Numerical simulation of a temperature field during multi-beads surface welding

“…Numerous papers have been published since then, in which numerical methods were used for analysis of thermomechanical states of multi-pass welding, a.o. in [7][8][9][10][11][12][13][14][15]. In many of them, theoretical (numerical) considerations were subjected to experimental verification.…”

“…In [7][8][9][10] the calculated temperature field was verified by comparing theoretical and measured (using thermocouples) welding thermal cycles. In [11][12][13][14][15], the calculated and real shapes and sizes of fusion zones were compared.…”

“…The above publications [4][5][6][7][8][9][10][11][12][13][14][15] present the results of numerical simulations for butt and fillet welded joints. Reed and Bhadeshia [16] first proposed a simple model for rebuilding by use of the welding process.…”