NUMERAL GROUND OF APPLICATION OF MIXED 3D-MODELEY COMPOSITES AT COMPUTATIONS OF BOLTED JOINTS

Костянтин Миколайович Рудаков, Аліна Сергійовна Шандура

Abstract


In modern it is FEM-programs PLM class-room there is a possibility to create the mixed is FE models in the way of "glued". It allows to create, in particular, for calculations on PC rather small 3D-models of polymeric composite materials (composite) in bolt joints in which composite in zones of apertures it is modelled body-sectional, and behind them – approximately, according to the theory of "the effective module".

In the given message the substantiation of possibility of application of mixed 3D-models composite is spent at modelling of bolt joints by conducting of numerical experiments for definition of the minimum sizes of zones of more exact modelling composite at maintenance of equal accuracy of calculations.

It is created twenty 3D-models of samples single-shear a double-row bolt joint with ПКМ (a contact problem) in which the distance from an aperture to "glued" boundary line (5 values) varied, and also a side play of bolts with apertures (4 values). Magnitude of force of contraction of a package and force stretching a specimen were invariable. By results of calculations limiting values of stress are defined: equivalent on Mises and minimum (tables). Schedules are builted. Leading-outs are drawn, that application of mixed 3D-models composite in bolt joints was possibly, that the minimum distance from an aperture to "glued" boundary line it is possible to choose by formula s> =0.8h, where h - a thickness of a plate with composite, at rather small side plays a bolt/aperture, or as s> = (1 … 1.2) h at the maximum side plays.

This direction of researches needs to be continued, as quantity of parameters of agency much more, than it is observed in the message.


Keywords


numerical 3D-modelling; composite; a bolt joint; mixed 3D-model composite; FEM

References


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Gordon Kelly, Stefan Hallström. Bearing strength of carbon fibre/epoxy laminates: effects of bolt-hole clearance. – Composites. Part B: Engineering, 2004. 35. pp. 331-343.

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Krivov G.A., Matvienko V.A., Rud'ko A.N., Vasilevskij E.T., Romanovich G.N., Rudakov K.N., Shukaev S.N., Dobronravov A.A.. Numerical researches of the is stress-strained condition of strongly loaded joints of members of the airframe. Tehno-logicheskie sistemy [Technological Systems]. Kyiv.: UkrNIIAT, 2014. 1(62). pp. 90-102.

Broughton W.R., Crocker L.E., Gower M.R.L. Design Requirements for Bonded and Bolted Composite Structures. NPL Re-port MATC (A) 65, 2002. 50 p.


GOST Style Citations


1. Gordon Kelly. Quasi-static strength and fatigue life of hybrid (bonded/bolted) composite single-lap joints. Composite Struc-tures, 2006. – 72. – р. 119-129 

2. Gordon Kelly, Stefan Hallström. Bearing strength of carbon fibre/epoxy laminates: effects of bolt-hole clearance. – Composites. Part B: Engineering, 2004. – 35. – р. 331-343 

3. Johan Ekh, Joakim Schön, Gunnar Melin. Secondary bending in multi fastener, composite-to-aluminium single shear lap joints. – Composites. Part B: Engineering, 2005. – 36. – р. 195-208. 

4. Межслойные эффекты в композитных материалах // Под ред. Н. Пейгано / Пер. с англ. – М.: Мир, 1993. – 346 с.

 5. Рудаков К.Н. Моделирование болтовых соединений из ПКМ в программном комплексе FEMAP/NX NASTRAN / К.Н. Рудаков, С.Н. Шукаев // Вісник національного технічного університету України "Київський політехнічний інститут", сер. Машинобудування №67. – 2013. – С. 199-206.

 6. Кривов Г.А. Моделирование болтовых соединений, содержащих детали из ПКМ, в среде FEMAP/NASTRAN / Кривов Г.А., Матвиенко В.А., Рудько А.Н., Рудаков К.Н., Шукаев С.Н., Негода С.П. // Технологические системы. – К.: Укр-НИИАТ, 2013. – №4(65). – С. 7-16.

 7. Кривов Г.А. Численные исследования напряженно-деформированного состояния высоконагруженных соединений элементов конструкции планера самолета // Г.А. Кривов, В.А. Матвиенко, А.Н. Рудько, Е.Т. Василевский, Г.Н. Ро-манович, К.Н. Рудаков, С.Н. Шукаев, А.А. Добронравов // Технологические системы. – К.: УкрНИИАТ, 2014. – №1(62). – С. 90-102. 

8. Broughton W.R., Crocker L.E., Gower M.R.L. Design Requirements for Bonded and Bolted Composite Structures // NPL Report MATC (A) 65, 2002. – 50 р.





DOI: http://dx.doi.org/10.20535/2305-9001.2015.74.44562

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