Residual stress analysis near a cold expanded hole in a textured Alclad sheet using X-ray diffraction

• Type: Article in International Scientific Journal
• Date: 2005

Authors

J C Pina (Author) Other; A M Dias (Author) Other; Paulo Matos (Author) FEUP; Pedro Moreira (Author) FEUP; Paulo Tavares De Castro (Author) FEUP

Journal

Title: Experimental Mechanics

Vol. 45 No. 1

Pages: 83-88

ISSN: 0014-4851

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 20 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-000-4V4

DOI: 10.1177/0014485105051007

Abstract (EN): In this paper we present the methods of determination and the stress obtained at the periphery of a cold expanded hole in a 2024-T3 Alclad aluminum alloy sheet. The measurements in the aluminum clad were performed by the sin(2) psi method, taking experimental precautions to deal with the texture effects. In the core aluminum a special method had to be implemented to determine the stress values in a direction not accessible to the X-ray diffraction. The strains were measured in sample orientations selected according to the texture characteristics and stress factors F-ij were used to calculate the stress tensor. The F-ij values were determined assuming a quasi-isotropic material behavior, after concluding that the stress results were not significantly affected by factors calculated for textured material. The residual stress profile, both in the clad and in the sheet, shows a nearly axisymmetric stress state. Compressive stresses were observed near the periphery of the hole, with values that are higher on the exit than on the entrance face. Residual stresses were also higher in the hoop direction than in the radial direction. They decreased with the radial distance to the hole and affected the previous stress state over a distance of 6 mm. The plastic deformation induced by the cold expansion is well evidenced by the FWHM values, which in the affected zone decrease with increasing distance from the hole edge.

Language: English

Type (Professor's evaluation): Scientific

Notes: Nota para quem trate desta base de dados: esta revista é actualmente publicada pela Springer, sendo enganador indicar como editora a Sage (situação que encontrei aqui registada e o 'sistema' informático não me permitiu corrigir). A pretender-se indicar algo do passado da revista, então devia ser indicada a sua originadora, a SESA (Society for Experimental Stress Analysis, que posteriormente viria a dar origem à SEM - Society for Experimental Mechanics). Paulo t de castro, 14 de Julho de 2013

No. of pages: 6