THE ANALYSIS OF LONGITUDINAL SHRINKAGE IN BUTT WELD JOINT

In this research longitudinal shrinkage of two steel plates with identical thickness that are joint together through butt welding and another steel plate with bead welding. This study begins with the introduction of a model, in which the thermoelastoplastic zones near the weld line is simulated with a thermoelastoplastic flat bar, and full-elastic areas beyond the weld line is simulated with a full elastic springs, by proposing the physical terms of the model and favorite presumptions, the related equations are solved and eventually the conclusion is a relation which can be used to calculate the amount of longitudinal shrinkage with acceptable accuracy.