Measuring of non-uniform residual stresses in depth with optical  techniques

Ribeiro, J.E.; Monteiro, Jaime M.; Vaz, M.A.P.; Lopes, Hernani

http://hdl.handle.net/10198/7188

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Abstract(s)

The goal of this work is the development of optical experimental techniques to measure non-uniform residual stresses in depth, as alternative to the hole-drilling method with strain gages. The proposed hybrid techniques are based on Moiré Interferometry and in-plane Electronic Speckle Pattern Interferometry (ESPI) and used the integral method for stress assement. In this work a shot peening specimen was used to compare the results obtained with different techniques: X ray diffraction, hole drilling with strain gages, finite elements method simulation and the referred optical techniques.

Keywords

Residual stress Optical methods Moiré interferometry Hole-drilling mehod

URI

http://hdl.handle.net/10198/7188

Citation

Ribeiro, J.E.; Monteiro, J.; Vaz, M.; Lopes, H. (2008). Measuring of non-uniform residual stresses in depth with optical techniques. In International conference on full-field measurement techniques and their applications in experimental solid mechanics - Photomechanics 2008. Loughborough, UK.