Comparison of Residual Stress State on Sheets Faying Surface after Standard and NACA Riveting-Numerical Approach

• Autorzy: Wronicz W.

Identyfikatory

DOI

10.1515/fas-2016-0011

• Języki publikacji: EN

Abstrakty

EN

One crucial characteristic of the aircraft structure are fatigue properties and rivets are usually critical areas in metal airframes due to fatigue cracks nucleation. According to literature, the NACA riveting method offers a huge increase in fatigue life of riveted lap joints. This paper presents FE simulations of quasi-static riveting on a press for standard countersunk rivets and the NACA riveting in two configurations: with a normal brazier rivet and a brazier rivet with a compensator. The analyzed configurations have been compared based on the stress courses on the sheets faying surfaces after riveting process. Due to a lack of data, the rivet length and the squeezing force value were assumed for NACA riveting based on FE simulations. The results indicated beneficial influence of the NACA riveting in the outer sheet (with a countersunk) and disadvantageous influence in the inner sheet. This effect was stronger in the case of the rivet with a compensator.

Słowa kluczowe

EN

NACA riveting; fatigue; FE; joints

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2016
• Tom: Iss. 8
• Strony: 116--126
• Opis fizyczny: Bibliogr. 14 poz., rys., wykr.

Twórcy

autor

Wronicz W.

• Institute of Aviation, Materials and Structures Research Center, Al. Krakowska 110/114, 02-256 Warsaw, Poland

Bibliografia

• [1] R.P.G. Müller, L.J. Hart-Smith, Making fuselage riveting lap splices with 200-year crackfree fatigue life. ICAF 97’, Fatigue in new and ageing aircraft. Proceedings of the I9-th Symposium of the International Committee of Aeronautical Fatigue 1997, Edinburgh, EMAS Publishing, pp.499-522, (1997).
• [2] Bartone, L. M., Mandel, M., W. Tensile Tests of NACA and Conventional Machine-Countersunk Flush Rivets. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc61751/. Accessed August 30, 2016, (1944).
• [3] Lundquist E., Gottlieb R. A study of the tightness and flushness of machine-countersunk rivets for aircraft, NACA Wartime Report L-294 UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc61748/. Accessed August 30, 2016, (1942).
• [4] Maney G. A., Wyly, L T. Fatigue strength of flush-riveted joints for aircraft manufactured by various riveting methods. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc61854/. Accessed August 30, 2016, (1945).
• [5] Hartman, A.: A comparative investigation on the investigation on the influence of sheet thickness, type of rivet and number of rivet rows on the fatigue strength at fluctuating tension of riveted single lap joints of 24 ST Alclad sheet and 17 S rivets. Report NLR M.1943. NLR, Amsterdam, (1954).
• [6] Oldersma, A.: Fatigue of riveted joints. A literature survey and statistical analysis of existing test data. Report NLR CR 92401 L. NLR, Amsterdam, (1992).
• [7] LJ Hart-Smith, Forgotten attributes of NACA rivet installations and ice-box rivets, 7th. joint FAA/DoD/NASA Aging Aircraft Conference, New Orleans, Louisiana, September 8-11, 2003, Boeing paper PWDM03-0130, (2003).
• [8] Skorupa A., Skorupa, M., Riveted lap joints in aircraft fuselage: design, analysis and properties. Springer Science & Business Media, (2012).
• [9] Skorupa M., Skorupa A., Machniewicz T., Korbel A., Effect of production variables on the fatigue behaviour of riveted lap joints, International Journal of Fatigue, 32 (2010) pp.996-1003, (2010).
• [10] Wronicz, W., Kaniowski J., Experimental and Numerical Study of Strain Progress During and After Riveting Process for Brazier Rivet and Rivet with Compensator-squeezing force and rivet type effect. Fatigue of Aircraft Structures 2011.3, pp.166-190, (2011).
• [11] Muller R. An Experimental and Analytical Investigation on the Fatigue Behavior of Fuselage Riveted Lap Joint. Ph.D. thesis, TU Delft, Netherlands, (1995).
• [12] Fárek J.: FE-Modelling Methodology of Riveted Joints. Czech Aerospace Proceedings. Journal For Czech Aerospace Research, No 2/2010, pp.12-16, (2010).
• [13] ASM Handbook, Volume 18, Friction, Lubrication, and Wear Technology, (1995).
• [14] Kaniowski, J. Comparison of Selected Rivet and Riveting Instructions, Fatigue of Aircraft Structures 2014.6, pp.39-62, (2014).

Uwagi

EN

The work was financed from the scientific research resources of the Institute of Aviation. The author expresses his gratitude to Dr L. J. Hart-Smith for his inspiriting paper and remarks about the NACA riveting method.

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).