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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Ribeiro, J (Autor) Outra; Monteiro, J (Autor) Outra; Lopes, H (Autor) Outra; Mário Vaz (Autor) FEUP

Revista

Título: Strain

Vol. 47

Páginas: E542-E550

ISSN: 0039-2103

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 16 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9