Measurement of residual stresses using a radial in-plane digital speckle pattern interferometer and local heating: recent advances

Matías R. Viotti; Armando Albertazzi Gonçalves Jr.; Guillermo H. Kaufmann

doi:10.1117/12.611743

14 February 2005 Measurement of residual stresses using a radial in-plane digital speckle pattern interferometer and local heating: recent advances

Matías R. Viotti, Armando Albertazzi Gonçalves Jr., Guillermo H. Kaufmann

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Proceedings Volume 5776, Eighth International Symposium on Laser Metrology; (2005) https://doi.org/10.1117/12.611743
Event: Eighth International Conference on Laser Metrology, 2005, Merida, Mexico

Abstract

This paper presents an application of a radial in-plane digital speckle pattern interferometer and a local heating combined system to measure residual stresses in ductile materials. The system allows the local heating of a small spot and the measurement of the radial in-plane displacement field generated around it. In order to quantify the residual stresses from the measured displacement field, the thermomechancial problem is simulated using the finite element method and a modified hole-drilling model is applied. The performance of the system is evaluated by measuring the stress generated by a preloaded specimen. It is shown that the combined system can measure residual stresses with a typical error of approximately 5%.

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Matías R. Viotti, Armando Albertazzi Gonçalves Jr., and Guillermo H. Kaufmann "Measurement of residual stresses using a radial in-plane digital speckle pattern interferometer and local heating: recent advances", Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); https://doi.org/10.1117/12.611743

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KEYWORDS

Interferometers

Mirrors

Speckle pattern

Chemical elements

Finite element methods

Speckle

Interfaces

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