Many analytical and experimental techniques utilize two-dimensional analysis approach to determine residual strains and stresses at cold expanded holes. In the present work, a recently developed technique of hole drilling was used to sketch stress patterns in three-dimension at a particular orientation of split-sleeve cold expanded holes. At this orientation, similarities were obtained in between the present results and the stress distributions measured by Fourier series expansion, neutron diffraction methods and prediction of a recent finite element analysis. It is clear that after cold expansion there are significant variations in residual hoop stresses at different sections through the thickness of the plate. However, finish reaming and de-burring around the hole redistributes residual stresses such that hoop stresses adjacent to the hole along its entire length becomes more compressive and almost uniform. Finally a correlation between stress pattern and crack profile, displaying the through-thickness effect was shown.
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January 2004
Technical Papers
Through-Thickness Residual Stress Distribution After the Cold Expansion of Fastener Holes and Its Effect on Fracturing
A. Tamer O¨zdemir,
A. Tamer O¨zdemir
Materials Division, Department of Metallurgy, Faculty of Technical Education, Gazi University, Ankara, Turkey
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Lyndon Edwards
Lyndon Edwards
Department of Materials Engineering, Faculty of Technology, Open University, Milton Keynes MK7 6AA, UK
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A. Tamer O¨zdemir
Materials Division, Department of Metallurgy, Faculty of Technical Education, Gazi University, Ankara, Turkey
Lyndon Edwards
Department of Materials Engineering, Faculty of Technology, Open University, Milton Keynes MK7 6AA, UK
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division November 13, 2002; revision received September 2, 2003. Associate Editor: R. Craig McClung.
J. Eng. Mater. Technol. Jan 2004, 126(1): 129-135 (7 pages)
Published Online: January 22, 2004
Article history
Received:
November 13, 2002
Revised:
September 2, 2003
Online:
January 22, 2004
Citation
O¨zdemir, A. T., and Edwards, L. (January 22, 2004). "Through-Thickness Residual Stress Distribution After the Cold Expansion of Fastener Holes and Its Effect on Fracturing ." ASME. J. Eng. Mater. Technol. January 2004; 126(1): 129–135. https://doi.org/10.1115/1.1634278
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