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JWJ > Volume 28(4); 2010 > Article
Journal of KWJS 2010 August;28(4) :33-40.
Published online September 8, 2010.
A Study on the Predicting Transverse Residual Stress at the Ultra Thick FCA Butt Weldment of Hatch Coaming in a Large Container Vessel
Sang-Beom Shin, Dong-Ju Lee, Joo-Sung Lee


Correspondence:   Published online September 8, 2010
ABSTRACT
  The purpose of this study is to establish a predictive equation of transverse residual stress at the thick FCA butt weldment of large container vessel. The variables used were restraint degree, yield strength of base material, thickness of weldment and welding heat input. Restraint degree at the thick weldment of container ship having the various welding sequence was calculated using FEA. From the result, the H-type specimen was designed to reproduce the level of restraint degree at the actual weldment of containership. Based on the results, the predictive equations of the mean value and the distribution of transverse residual stress at each location of the weldment were established using dimensional analysis and multiple-regression method. The predictive equations were verified by comparing with those measured by XRD in the actual weldment of the ship.
Keywords: Containership;Transverse residual stress;Restraint degree;Heat input;Yield strength;FEA;Modified H-type specimen;XRD
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