TY - JOUR
TI - Numerical aspects for efficient welding computational mechanics
AU - Aburuga Tarek Kh.S
AU - Sedmak Aleksandar S
AU - Radaković Zoran J
JN - Thermal Science
PY - 2014
VL - 18
IS - 11
SP - 139
EP - 148
PT - Article
AB - The effect of the residual stresses and strains is one of the most important  parameter in the structure integrity assessment. A finite element model is  constructed in order to simulate the multi passes mismatched submerged arc  welding SAW which used in the welded tensile test specimen. Sequentially  coupled thermal mechanical analysis is done by using ABAQUS software for  calculating the residual stresses and distortion due to welding. In this  work, three main issues were studied in order to reduce the time consuming  during welding simulation which is the major problem in the computational  welding mechanics (CWM). The first issue is dimensionality of the problem.  Both two- and three-dimensional models are constructed for the same analysis  type, shell element for two dimension simulation shows good performance  comparing with brick element. The conventional method to calculate residual  stress is by using implicit scheme that because of the welding and cooling  time is relatively high. In this work, the author shows that it could use the  explicit scheme with the mass scaling technique, and time consuming during  the analysis will be reduced very efficiently. By using this new technique,  it will be possible to simulate relatively large three dimensional  structures.