Moire Interferometry Assessement of Residual Stress Variation in Depth on a Shot Peened Surface

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Ribeiro, J (Author) Other; Monteiro, J (Author) Other; Lopes, H (Author) Other; Mário Vaz (Author) FEUP

Journal

Title: Strain

Vol. 47

Pages: E542-E550

ISSN: 0039-2103

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-002-QK8

DOI: 10.1111/j.1475-1305.2009.00653.x

Abstract (EN): The main goal of this work was the development of experimental techniques to measure in depth non-uniform residual stresses, as alternative to the more conventional hole-drilling method with strain gauges. The proposed experimental methodology is based on moire interferometry. This high resolution field technique allows in-plane displacement assessment without contact. Grating replication techniques were also developed to record high quality diffraction gratings onto the specimen's surface. A laser interferometry setup was implemented to generate the master grating (virtual). The stress relaxation was promoted by blind hole-drilling and the obtained fringe patterns were video recorded. Image processing techniques were applied to assess the in-plane strain full-field. A finite elements code (FEM), ANSYS (R), was used to simulate the stress relaxation process and to calculate the hole-drilling calibration constants.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9