Open AccessVirtual Welded - Joint Design Integrating Advanced Materials and Processing Technology
Author(s) -
Zhizhou Yang,
Howard W. Ludewig,
S. Suresh Babu
Publication year - 2005
Language(s) - English
Resource type - Reports
DOI - 10.2172/862362
Subject(s) - welding , residual stress , joint (building) , materials science , structural engineering , compressive strength , microstructure , stress (linguistics) , mechanical engineering , engineering , metallurgy , composite material , linguistics , philosophy
Virtual Welede-Joint Design, a systematic modeling approach, has been developed in this project to predict the relationship of welding process, microstructure, properties, residual stress, and the ultimate weld fatique strength. This systematic modeling approach was applied in the welding of high strength steel. A special welding wire was developed in this project to introduce compressive residual stress at weld toe. The results from both modeling and experiments demonstrated that more than 10x fatique life improvement can be acheived in high strength steel welds by the combination of compressive residual stress from the special welding wire and the desired weld bead shape from a unique welding process. The results indicate a technology breakthrough in the design of lightweight and high fatique performance welded structures using high strength steels