Numerical Simulation and Experimental Investigation of Residual Stress in Multi-Pass Butt-Welded Joints of Q235 Thick Plates for Engine Structures
Localized heating and repeated thermal cycling during thick-plate multi-pass welding can produce a complex residual stress state, which may impair the structural reliability of welded components used in marine engines. This study investigates a 55 mm-thick Q235 steel butt joint with a K-groove deposited in 12 passes. B...