Longitudinal residual stress distribution of Q460 high-strength steel welded T-section

The segmentation method was used to measure the longitudinal residual stress distribution of four Q460 high-strength steel welded T-shaped sections; with the help of the general finite element program ANSYS, the thermal-structural coupling analysis method was used to simulate the cutting and welding process of the steel plate, and the longitudinal residual stress distribution obtained by numerical simulation was The residual stress is compared with the test value to verify the correctness of the finite element analysis process; based on the finite element method, more longitudinal residual stress distributions of welded T-shaped sections of Q460 high-strength steel with different cross-section sizes are obtained, and the rich data are summarized and analyzed, focusing on Study the influence of plate width-to-thickness ratio and plate thickness on the size and distribution of residual stress. The results show that the residual tensile stress is distributed in the area around the weld, the flange and the web extension, while the residual compressive stress is distributed in the flange extension. The middle part and the middle area of ??the web; the residual tensile stress has nothing to do with the plate width-thickness ratio and the plate thickness, and the residual compressive stress is inversely proportional to the plate width-thickness ratio and the plate thickness; the residual stresses of the flange and the web have reached self-balancing. Proposed The longitudinal residual stress distribution model of Q460 high-strength steel welded T-shaped section can provide an important reference for the subsequent numerical analysis of the overall stable bearing capacity of the steel pressure bar.