Cross-Sectional Mapping of Residual Stresses By Measuring The Surface Contour After A Cut  

Oleh:

Prime, M. B.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 123 no. 2 (2001), page 162-168.
Topik: Cross - section data; cross - sectional; mapping; residual stresses; measuring; surface countour

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

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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