Study of Surface Residual Stress by Three-Dimensional Displacement Data at A Single Point in Hole Drilling Method  

Oleh:

Wu, Z. ; Lu, J.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 122 no. 2 (2000), page 215-220.
Topik: residual stresses; surface; residual stress; displacement data; single point; hole drilling method

Ketersediaan

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

Lihat Detail Induk

Isi artikel

A method combining moire interferometry, Twyman – Green interferometry, and blind hole drilling method is proposed for simple and accurate determination of residual stress. The relationship between the three - dimensional surface displacements produced by introducing a blind hole and the corresponding residual stress is established by employing the Fourier expansion solution containing a set of undetermined coefficients. The coefficients are calibrated by 3D finite element method. The surface in - plane displacements Ux, Uy, and the out - of - plane displacement Uz produced by the relaxation of residual stress are measured by moiré interferometry and Twyman – Green interferometry, respectively, after the hole - drilling procedure. The complete three - dimensional displacement data at any single point around the hole can be used for residual stress determination. The accuracy of the method is analyzed and the experimental procedure is described to determine the sign of residual stresses. As an implementation of the method, a shot peening residual stress problem is studied.

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