A Study on the Numerical Analysis of Thermal and Mechanical Behavior for High Tensile Steel Welded Joint

J. Ocean Eng. Technol. 1998;12(4):33-42.

Han-Sur Bang;Rae-Su Lim;Jong-Myung Kim

고장력강 용접부의 열ㆍ역학적 거동에 관한 수치해석적 연구

방한서;임래수;김종명;

조선대학교 선박해양공학과;조선대학교대학원;

Keywords: high tensile, Numerical analysis, Welding residual plastic strains, Post welding heat treatment, Thermal elasto-plasto-creep,

핵심용어: 고장력강, 수치해석, 용접 소성 변형율, 용접후열처리, 점열탄소성,

Abstract

"High tensile steel has been welding in building construction and ship structure to reduce cost as well as weight. Accordingly, welding strength and weldability of high tensile steel is a matter of concern and interest. In the case of high tensile, brittle fracture and buckling strength are affected by welding residual stresses. For the sound design of structure using high tensile steel, distribution of welding residual stress need to be identified, which should be considered as initial imperfection of welded structure. Therefore, in this paper, in order to know the thermal and mechanical characteristics of high tensile steel during the welding and the post welding heat treatment, we would be compared with mild steel through numerical analysis of computer program based on the finite element method. The materials, which used study on welding strength, are SWS490, 60㎏f/㎟ class high tensile steel(HT60) and 80㎏f/㎟ class high tensile steel (HT80)."