A powerful new method for residual stress measurement is presented. A part is cut in two, and the contour, or profile, of the resulting new surface is measured to determine the displacements caused by release of the residual stresses. Analytically, for example using a finite element model, the opposite of the measured contour is applied to the surface as a displacement boundary condition. By Bueckner’s superposition principle, this calculation gives the original residual stresses normal to the plane of the cut. This “contour method” is more powerful than other relaxation methods because it can determine an arbitrary cross-sectional area map of residual stress, yet more simple because the stresses can be determined directly from the data without a tedious inversion technique. The new method is verified with a numerical simulation, then experimentally validated on a steel beam with a known residual stress profile.
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April 2001
Technical Papers
Cross-Sectional Mapping of Residual Stresses by Measuring the Surface Contour After a Cut
M. B. Prime, Technical Staff Member, Mem. ASME
M. B. Prime, Technical Staff Member, Mem. ASME
Engineering Sciences & Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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M. B. Prime, Technical Staff Member, Mem. ASME
Engineering Sciences & Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division February 1, 2000; revised manuscript received November 3, 2000. Associate Editor: E. Busso.
J. Eng. Mater. Technol. Apr 2001, 123(2): 162-168 (7 pages)
Published Online: November 3, 2000
Article history
Received:
February 1, 2000
Revised:
November 3, 2000
Citation
Prime, M. B. (November 3, 2000). "Cross-Sectional Mapping of Residual Stresses by Measuring the Surface Contour After a Cut ." ASME. J. Eng. Mater. Technol. April 2001; 123(2): 162–168. https://doi.org/10.1115/1.1345526
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