About mechanical joints design in metal - composite structure

• Autorzy: Puchała K. , Szymczyk E. , Jachimowicz J.
• Języki publikacji: EN

Abstrakty

EN

Riveting is still one of the main joining methods of thin-walled aircraft structures. Such features as simplicity of implementation, possibility of two different material connection (e.g. metallic with non-metallic ones) and the fact that is it a well-known (reliable) method causes popularity of riveting. The never-ending attempt to obtain as low mass as possible (mainly to reduce fuel consumption) is the reason for using material of high specific strength in the aerospace industry. High strength titanium or aluminium alloys (e.g. 2024T3) and composite laminates (e.g. CFRP or Glare) are examples of such materials. The article deals with methods of connecting various materials. The paper presents advantages and disadvantages of different/selected connection types. Strength prediction and failure modes of mechanical joints are described for metallic as well as for composite components. Composites are complex materials having an anisotropic structure (and anisotropic mechanical properties) leading to various failure mechanisms. Main principles for appropriate joint design of composite laminate panels (laminate configuration and typical/specific geometrical dimensions) are indicated/specified. The bearing failure mechanism is accepted to be a safe progressive one. Mechanism of bearing (generally compressive) load transfer into composite laminates by shear of the matrix is analysed. Some examples of improvement bearing strength of laminates are presented according to literature. On the base of presented examples and bearing load transfer analysis, some conclusions for an appropriate solution of this problem are drawn.

Słowa kluczowe

EN

mechanical joint; adhesive joint; FEA; aviation

• 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: 2012
• Tom: Vol. 19, No. 3
• Strony: 381--390
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Puchała K.

autor

Szymczyk E.

autor

Jachimowicz J.

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

Bibliografia

• [1] Astachow, M. F., Karawajew, A. W., Makarow, S. J., Suzdajew, J. J, Sprawocznaja kniga po razczetu samoleta na procznosc, Oborongiz, Moskwa 1954.
• [2] Aktas, A., Dirikolu, M. H., The effect of stacking sequence of carbon epoxy composite laminates on pinned – joint strength, Composite Structures 62, pp. 107-111, 2003.
• [3] Camanho, P. P., Matthews, F. L., Stress and strength prediction of mechanically fastened joints in FRP: a review, Composites Part A 28A, pp. 529-547, 1997.
• [4] Zhang, Y. X., Zhang, H. S., Multiscale finite element modeling of failure process of composite laminaes, Composite Structures 92, pp. 2159-2165, 2010.
• [5] Szymczyk, E., Godzimirski, J., The influence of riveting process on sheets fatigue life – the stress state analysis, Acta Mechanica et Automatica, Vol. 6, No. 1, 2012 (in press).
• [6] Asi, O., An experimental study on the bearing strength behaviour of Al2O3 particle filled glass fiber reinforced epoxy composites pinned joints, Composite Structures 92, pp. 354-363, 2010.
• [7] Crosky, A., Kelly, D., Li, R., Legrand, X., Huong, N., Ujjin, R., Improvement of bearing strength of laminated composites , Composite Structures 76, pp. 260-271, 2006.
• [8] Camanho, P. P., Tavares, C. M. L., de Oliveira, R., Marques, A. T., Ferreira, A. J. M., Increasing the efficiency of composites single – shear lap joint using bonded inserts, Composites: Part B 36, pp. 372-383, 2005.
• [9] Fink, A., Camanho, P. P., Andrés, J. M., Pfeiffer, E., Obst, A., Hybrid CCFRP/titanium bolted joints: Performance assessment and application to a spacecraft payload adaptor, Composites Science and Technology 70, pp. 305-317, 2010.