열변형률 기반 변형률 경계법을 이용한 곡선 가열선을 가지는 판의 열변형 신속 예측

초록

In this paper, the thermal strain based SDB (strains directly as boundary) method considering phase transformation is proposed to rapidly and accurately predict the thermal deformation by multiple curved heating paths. The volume expansion of the martensite combined with the phase change of the heated material updated the magnitude of the thermal strain and inherent strain. Because of additional loads effect caused by previous heating line, while applying thermal strain and virtual temperature to elastic plastic finite element analysis by 2D shell element, we analyzed the temperature distribution of plate to investigate the inherent strain region required for SDB method. The results are shown that the finite element model of shell elements accompanied by SDB method based on thermal strain can successfully predict the thermal deformation by multiple curved heating paths within few seconds and show a good agreement with 3D finite element model of thermal-structural coupled solid element.