Numerical study of the influence of shape imperfections on residual stress fields in a rivet hole

• Autorzy: Sławiński G. , Niezgoda T. , Szymczyk E. , Jachimowicz J.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with the numerical analysis on residua! stress and strain fields in a rivet hole. This stage of study concerns improving of the fatigue performance of riveted joints in an airframe. Riveting, particularly in aviation, is a traditional but still commonly used method of joining sheet metal components. Aircraft structures are thin-walled ones, with coverings made of thin sheets stiffened by stringers, frames or ribs. Sheets are typically assembled by a multiple rivet or bolt joints. Rivets and bolts are also used to joint sheets and stiffeners. Therefore, fatigue resistance of the aircraft structure depends on tens of thousands or even hundreds of thousands r ivet joints, which are used to build it. The local numerical models of the joint are considered with regard to the aim introduced in the paper. Numerical FE simulations of an upsetting process are carried out using the LS-DYNA code. Three-dimensional numerical models are used to determine the resulting stress and strain fields at the mushroom rivet and around the hole. This type of problem requires the use of contact between the elements assembled and non-linear geometrie and elasto-plastic multilinear materiał models to simulate the behaviour of the rivet and sheets. The influence of shape imperfection on strain and stress states is studied.

Słowa kluczowe

EN

FEM; riveted joints; imperfections; residual stress

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 2
• Strony: 427--434
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Sławiński G.

autor

Niezgoda T.

autor

Szymczyk E.

autor

Jachimowicz J.

• Military University of Technology Department of Mechanics and Applied Computer Science 2 Gen. Sylwestra Kaliskiego Street, 00-908 Warsaw, Poland tel.[phone], fax: [phone],

Bibliografia

• [1] de Rijck, J., Stress Analysis of Fatigue Crack in Mechanically Fastened Joints, (Doctoral Dissertation), Delft University of Technology, 2005.
• [2] Muller, R., An experimental and numerical investigation on the fatigue behaviour of fuselage riveted lap joints, Doctoral Dissertation, Delft University of Technology, 1995.
• [3] de Rijck, J., Homan, J. J., Schijve, J., Benedictus, R., The driven rivet head dimensions as an indication of the fatigue performance of aircraft lap joints, International Journal of Fatigue, Vol. 9, pp. 2208-2218, 2007.
• [4] Szymczyk, E., Jachimowicz, J., Derewońko, A., Analysis of residual stress fields in riveted joint, Journal of KONES, Vol. 14, pp. 465-474, Warsaw 2007.
• [5] Jachimowicz, J., Kajka, R., Szachnowski, W., Szymczyk, E., FEM and experimental analysis of strain and stress states around the rivet hole in the thin walled aircraft structure (in polish), Analizy numeryczne wybranych zagadnień mechaniki, 21, pp. 399-424, Warsaw 2007.
• [6] Szymczyk, E., Jachimowicz, J., Sławiński, G., Riveting process simulation – upsetting of the mushroom rivet, Journal of KONES, Vol. 15, pp. 493-502, Warsaw 2008.
• [7] OST 1 34040-79.