A Study of the Residual Stress Characteristics of FCAW Multi-Pass Butt Joint for an Ultra-Thick Plate

J. Ocean Eng. Technol. 2010;24(2):62-66.

Bang Hee-Seon,Bang Han-Sur,Lee Yoon-Ki,Kim Hyun-Su,Lee Kwang-Jin

Dept. of Naval Architecture & Ocean Engineering Chosun University,Dept. of Naval Architecture & Ocean Engineering Chosun University,Dept. of Automobile Chosun College of Science & Technology,Dept. of Naval Architecture & Ocean Engineering Graduate Sch

극후판 다층 FCAW 맞대기 용접부의 잔류응력 특성에 관한 연구

방희선,방한서,이윤기,김현수,이광진

조선대학교 공과대학 선박해양공학과,조선대학교 공과대학 선박해양공학과,조선이공대학 자동차학과,조선대학교 대학원 선박해양공학과,한국생산기술연구원 동력부품센터

Keywords: Container ship, Hatch coaming, High strength ultra thick plate, Flux core arc welding (FCAW), Welding residual stress, Thermal elasto-plastic analysis

핵심용어: 콘테이너선, 해치코밍, 고강도 극후판, 플럭스코어 아크용접, 용접잔류응력, 열탄소성해석

Abstract

The goal of this work is to establish the reliability of FCA welded joints for high strength EH36-TMCP ultra thick plate. For this, heat conduction and thermo elasto-plastic analyses have been conducted on a multi-pass, X-groove, butt-joint model to clarify the thermal and mechanical behavior (residual stresses, magnitude of the stresses, and their production and distribution mechanisms) of the weld joint. In addition, the results of the welding residual stress obtained from thermo elasto-plastic analysis was verified and compared with results obtained by XRD analysis.