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Analysis of Mechanical Behavior and Fracture Toughness $K_{IC}$ on EGW Welded Joints for High Strength EH36-TMCP Ultra Thick Plate  

Bang, Hee-Seon (조선대학교 선박해양공학과)
Bang, Han-Sur (조선대학교 선박해양공학과)
Joo, Sung-Min (포항산업과학연구원 용접센터)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.22, no.6, 2009 , pp. 565-572 More about this Journal
Abstract
This work intends to establish the reliability and fracture toughness $K_{IC}$ criterion of welded joints by EGW for high strength EH36-TMCP ultra thick plate. For this, firstly thermo elasto-plastic analysis has been carried out on two pass X-groove butt joint model to clarify the thermal and mechanical behaviour(residual stress, plastic strain, magnitude of stress and their distribution and production mechanism). Moreover, to establish fracture criterion, analysis of fracture toughness $K_{IC}$ has been performed under the notch machined and residual stress with the load condition on EGW welded joints. A quantitative fracture criterion for EGW welded joints is suggested by using $K_{IC}$.
Keywords
EGW(Electro Gas Welding); high strength ultra thick plate; EH36-TMCP steel; welding residual stress; fracture toughness $K_{IC}$; thermal elasto-plastic analysis; fracture analysis;
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