Mechanical design of components composite-metal connections

Аuthors

Larionova A. A.^*, Dudchenko A. A.^**, Sergeev V. N.^***

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: a.larionova@inbox.ru
**e-mail: a_dudchenko@mail.ru
***e-mail: k603sergeev@mai.ru

Abstract

In this article considered method of analytical solution by determine parameters the transition zone of the wing joint for transmission of load from the composite to the metal. The developed method allows determine efficient length of transition seam zone, which depends on the value of loads, the diameter of the bolts, and material of composite and metal. First of all, it is determined by the length of the inclusion zone. Then, it is determined by the required number of rows for fasteners, depending on the diameter of the bolt or rivets. Mechanical connections have a significant disadvantage associated with the drilling of holes for bolts or rivets, which leads to cutting fibers, stress concentration at the site of setting bolts and weakening of the strength and rigidity of the construction at this location. However, thanks to good strength and stiffness characteristics with low weight, the composite material (CM) are used in load-bearing structural elements of aviation and space technology.

Results were obtained in carrying out the work:

1. Conducted calculations by the formula shown effective accuracy of calculation of mechanical coupling components. These formulas enable us to determine the inclusion in the work zone for bolted, riveted joints and needle.

2. The work area depends on the thickness of connection and properties of the material.

3. These ratios allow us to determine the number of rows of coupling elements, the diameter of the bolt and the pitch between the bolts.

4. Analytical calculation is checked by finite element method (FEM).

It shows good agreement between the calculation results.

Keywords:

mechanical connections, analytical calculation, metal materials, composite materials, bolts, rivets, needles, finite element technique

References

1. Endogur A.I., Kravtsov V.A., Soloshenko V.N. Trudy MAI, 2014. no.72: http://www.mai.ru/science/trudy/published.php?ID=47572

2. Yezhov A.D. Trudy MAI, 2015, № 82: http://www.mai.ru/science/trudy/published.php?ID=58728

3. Makarov A.F., Gromov V.F., Dunaev V.V., Eremin M.V., Makarov P.A. Vestnik Moskovskogo aviatsionnogo instituta, 2012, vol.19, no.3. pp. 15-18.

4. Dudchenko A.A., Reznichenko V.I. Dudchenko A.A., Reznichenko V.I. Raschet i eksperimental’naya proverka prochnosti igol’chatykh soedinenii detalei iz kompozitsionnykh materialov (Calculation and experimental verification of the strength of the needle connections of details from composite materials), Moscow, VIMI, vol. 1-2, 1997, pp. 68-78.

5. Vasil’ev V.V., Dudchenko A.A., Elpat’evskii A.N. Mekhanika polimerov, 1970, no. 1, pp. 144-147.

6. Leshchin A.V., Popov Yu.I. Konstruirovanie uzlov planera samoleta (Construction of airframe assemblies), Moscow, MAI, 1992, 104 p.

7. Shimkovich D.G. FEMAP& NASTRAN. Inzhenernyi analiz metodom konechnykh elementov (FEMAP & NASTRAN. Engineering Finite Element Analysis), Moscow, DMK Press, 2008, 704 p.

Download