An Assessment on the Ultimate Strength of Welding Joint by the Effect of External Force

J. Ocean Eng. Technol. 1995;9(2):20-29.

Bang Han-Seo,Cha Yong-Hun,O U-Seok

外力의 效果를 고려한 熔接部의 最終强度에 대한 評價

방한서,차용훈,오우석

조선대학교 선박해양공학과,조선대학교 기계공학과,조선대학교 대학원 기계공학과

Keywords: Welding residual stress, Initial deflection, Heat conduction, Thermal elastic-plastic, Ultimate strength

핵심용어: 용접잔류응력, 초기처짐, 열전도, 열탄소성, 최종강도

Abstract

When structures are constructed by welding, structural elements are always accompained by welding residual stress and deformation. Therefore, when the rigidity and strength of the welded structures is considered, it is very important to have sufficient information about the effect of initial deflection and welding residual stress on them. In this paper, the square plates with welding residual stress under compression are dealt with; First, heat conduction and thermal elastic-plastic problems are analyzed by finite element method using 4-node isoparametric elements for assessment on the ultimate strength of welding joint. Later, the ultimate strength of welding joint is assessed by examining the effect of changed type of loading. The specimens are 500{ imes}$500mm(a/b=1) and 750{ imes}$500mm(a/b=1.5) rectangular plates of whichthicknesses is 9.0mm and simply supported plates getting axiul load in each direction.