용접이상화에 의한 용접부정의 예측과 정도

Abstract

In order to reduce a grand compute time in prediction of welding distortion and residual stress by 3Dthermal elastic plastic analysis, idealization of welding that is methods to heat input simultaneously in allweld metal on the same welding direction is carried out on two weld joints(butt welding and fillet welding). Then, the accuracy of acquired results is investigated through the comparison of the high accuracy prediction results.The thermal conduction analysis results by idealization of welding, the temperature is raised accompanywith beginning of heat input because all of weld metal is heated input at the same time. On the other side,the temperature witch predicted with high accuracy is raised at the moment heating source passes themeasuring points. So, there is difference of time between idealization of welding and considering of movingheat source faithfully. However, temperature history by idealization of welding is well simulated a highaccuracy prediction results.