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

• Author(s): Ribeiro, J.E. ; Monteiro, J. ; Vaz, M.A.P. ; Lopes, H.
• Date: 2008
• Persistent ID: http://hdl.handle.net/10198/7188
• Origin: Biblioteca Digital do IPB
• Subject(s): Residual stress; Optical methods; Moiré interferometry; Hole-drilling mehod
• Document Type: Conference Object
• Language: English

Description

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.