MINIMIZATION OF FRACTURE PARAMETERS IN COMPOSITE BODY

Mirsalimov V.M., Doctor of Physico-Mathematical Science, Chief Researcher, Institute of Mathematics and Mechanics of the National Academy of Sciences of Azerbaijan, Baku, Republic of Azerbaijan, This email address is being protected from spambots. You need JavaScript enabled to view it.

Mammedova K.S., Postgraduate Student, Institute of Mathematics and Mechanics of the National Academy of Sciences of Azerbaijan, Baku, Republic of Azerbaijan

The problem of fracture mechanics to determine the optimal form inclusion what provides a minimum of stress intensity factors near the crack tip is solved. The obtained cross-sectional shape of foreign elastic inclusion enhances the bearing capacity of the composite body.

elastic composite body, binder, inclusions, cracks, stress intensity factors, minimize destruction parameters

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THE PREPREG’S CHARACTERISTICS UNDER COMPRESSION DETERMINATION

Vasilevich J.V., Doctor of Physical and Mathematical Sciences, Professor, Head of the Department, Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
Sakhonenko V.M., Candidate of Physical and Mathematical Sciences, Professor, Head of the Department "Applied Mathematics", Moscow State Open University, Moscow, Russia
Sakhonenko S.V., Candidate of Physical and Mathematical Sciences, Acting Associate Professor of the Department "Resistance of Engineering Profile Materials", Belarusian National Technical University, Minsk, Republic of Belarus
Gorely K.A., General Director, OAO "Vanguard", Minsk, Republic of Belarus
Malyutin E.V., Chief Designer, OAO "Vanguard", Minsk, Republic of Belarus

The deformation model of the prepregs made of plain and multi-axial textiles is presented. The function dependences for the strain determination during transversal compression of each thread family are found. The characteristics in form of inelastic constant of the compression and modulus of elasticity during compression are determined. The methods of these characteristics acquisition are developed. The correspondent experiments conducted for T-13 textile and the mentioned characteristics were found.

prepreg, composite, compression, inelastic component, deformation, system of equations, family of yarns

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COHESIVE CRACK WITH PARTIALLY CONTACTING FACES IN SECTION OF THE ROAD COVERING

Hasanov Sh.G., Doctor of Technical Sciences, Associate Professor, Azerbaijan Technical University, Baku, Azerbaijan, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The case of a longitudinal crack with interfacial bonds in section of a road covering with partially contacting faces is considered. It is considered, that under action of external loading (cave-in of a wheel in a rough surface of a covering) in a zone of compressing stresses there is a partial closing faces of a crack.

pavement, cohesive crack, restraining force of end fractured zone, crack partial closing, contact area, contact stress

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• Panasjuk V.V., Savruk M.P., Dacyshin A.P. Raspredelenie naprjazhenij okolo treshhin v plastinah i obolochkah [Stress distribution near the cracks in plates and shells]. Kiev, Nauk. dumka, 197. 443 p.
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• Mirsalimov V.M. Neodnomernye uprugoplasticheskie zadachi [Multidimensional elastic-plastic problems]. Moscow, Nauka, 1987. 256 p.

EXPERIMENTAL DEFINITION OF DEFECTS IN THE MATERIAL OF THE ELASTIC BODY

Kasitsyn A.V., Associate of the Military Academy of the Republic of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
Kisly I.I., Candidate of Technical Sciences, Deputy Head of the Faculty of UNR, Military Academy of the Republic of Belarus, Minsk, Republic of Belarus
Brancevich P.Ju., Candidate of Technical Sciences, Associate Professor of the Military Academy of the Republic of Belarus, Minsk, Republic of Belarus

In given article it is offered to use own forms of fluctuations as a diagnostic sign for detection of defects in a material of an elastic body. At realization of a way choose some own forms, define supervision parameters in various points of reference and
investigated details. Values of own forms of fluctuations are as the relation of the chosen parameters to parameters in a base point, and defect occurrence judge on a difference of values of own forms in the chosen points of reference and investigated details.

own waveforms, dynamic compliance, natural frequencies

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