COMPUTATIONAL ULTRASONIC STRESS-RELIEF PROCESS

In the article [4] is published a mathematical model of optimization thermal stress-relief process which are conditioned by the plastic yield speed phenomenon. This new paper take in advance thermal stressrelief process and complete with overlapping ultrasonic stresses which is acting during cooling after welding process. In conformity with theory, Nevill and Brotzen [5] said that residual stresses are decreased because these overlapping stresses determined the altering of metallic yielding stress. In this article, using numerical method Runge-Kutta [1] is computed the overlapping ultrasonic stresses above welding residual stresses at OLC45 steel.