Residual Stresses in AA6082 Shrink-fit Systems: Finite Element Calculations and Neutron Diffraction Measurements

Article type: Research Article

Authors: Albertini, G.^; | Ceretti, M. | Caglioti, G.^; | Fiori, F.^; | Monzani, R. | Viviani, L.

Affiliations: Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Università di Ancona, Via Brecce Bianche, I-60131 Ancona, Italy | INFM—Istituto Nazionale per la Fisica della Materia, Unità di Ricerca di Ancona, Ancona, Italy | Laboratoire Léon Brillouin (CEA/CNRS), CEA Saclay, F-91191 Gif-Sur-Yvette cedex, France | Dipartimento di Ingegneria Nucleare—CESNEF, Politecnico di Milano, Via Ponzio 34/3, I-20133 Milano, Italy | INFM—Istituto Nazionale per la Fisica della Materia, Unità di Ricerca di Milano Politecnico, Milano, Italy | Istituto di Scienze Fisiche, Università di Ancona, Via P. Ranieri 65, I-60131, Ancona, Italy

Note: [] Corresponding author. Tel: +39-071-2204735, fax +39-071-2204605 E-mail: [email protected]

Abstract: The residual stress field in shrink-fit disc-ring systems was investigated in the framework of a general research, the final goal of which is to establish optimisation criteria for the joining procedure in the AA6082 aluminium alloy. In particular, two different procedures were considered: the traditional thermoelastic and an innovative thermoelastoplastic coupling. The two processes were simulated by finite element calculations, which were optimised by comparison with existing analytic models. Neutron diffraction experiments were carried out on samples obtained by the two procedures. The comparison between the theoretical and experimental results showed a satisfactory agreement. Small differences found were ascribed to already existing residual stresses, which were actually measured in uncoupled samples.

Keywords: A1 alloy 6082, Shrink-fit, Residual stresses, Finite element, Neutron diffraction

DOI: 10.1080/10238160108200178

Journal: Journal of Neutron Research, vol. 9, no. 2-4, pp. 459-467, 2001