期刊
THIN-WALLED STRUCTURES
卷 45, 期 3, 页码 339-351出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2007.02.007
关键词
friction stir welding; initial imperfections; welding residual stress; buckling analysis; post-buckling analysis
The introduction of advanced welding methods as an alternative joining process to riveting in the manufacture of primary aircraft structure has the potential to realise reductions in both manufacturing costs and structural weight. However, welding processes can introduce undesirable residual stresses and distortions in the final fabricated components, as well as localised loss of mechanical properties at the weld joints. The aim of this research is to determine and characterise the key process effects of friction stir welding assembly methods on stiffened panel static strength performance. Utilising experimentally validated finite element modelling methods, it is demonstrated that welding induced residual stresses have a significant influence, and that collapse behaviour is less sensitive to advanced process effects and process effect magnitudes than panel initial buckling behaviour. (c) 2007 Elsevier Ltd. All rights reserved.
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