극후판 다층 FCAW 맞대기 용접부의 잔류응력 특성에 관한 연구
A Study of the Residual Stress Characteristics of FCAW Multi-Pass Butt Joint for an Ultra-Thick Plate
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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
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
참고문헌 (4)
- 방한서, "후판 용접부의 역학적 특성-유한요소법에 의한3차원 열탄소성 해석", 대한용접학회지, 10(4), pp.250~258 (1992)
- 방한서, "21", 4Cr-1Mo강 압력용기 Nozzle용접이음부의 재열균열에 관한 수치해석적 연구, 2000, pp.14(14), 88~94
- 방희선, "고강도 극후판 EH36-TMCP강 EGW용접부의 역학적 거동 및 파괴인성 KIC에 관한 해석", 한국전산구조공학회논문집, 22(6), pp.565~572 (2009), 한국전산구조공학회
- Keisuke Tanaka, "Evaluation of Residual Stresses by X-Ray Diffraction", pp.121~142 (2006), Yokendo Ltd.