Residual stress determination using blind-hole drilling and digital speckle pattern interferometry with automated data processing

DÍAZ, F.V.; KAUFMANN, G.H.; MÖLLER, O.

EXPERIMENTAL MECHANICS

SPRINGER

Año: 2001 vol. 41 p. 319 - 323

0014-4851

A combined system of blind-hole drilling and digital speckle pattern interferometry that performs automated data analysis is used to determine the magnitude of the residual stress induced in an aluminum plate subjected to uniaxial tension. The authors perform a finite element analysis of the blind-hole drilling process to adjust the analytical model commonly used for residual stress determination. The relieved displacement field due to the introduction of the blind hole is determined by the evaluation of the optical phase distribution. Using more than 300 values of this displacement field, the magnitude of the residual stress is determined and compared with the applied stress value.