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Registration Number

0223U000485, 0121U109742 , R & D reports

Title

Development of theory and methods for solving problems of nonlinear deformation of structural elements made of modern composite materials

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Head

Lvov Hennadii I., д.т.н.

Registration Date

09-01-2023

Organization

National Technical University "Kharkiv Polytechnic Institute"

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 The objects of research are the components of the thermal expansion tensor of unidirectional and orthogonally oriented fibrous composites, the resistance to delamination of samples made of a three-layer composite material: the rate of strain energy release, stress intensity coefficients, and the phase angle of mode mixing. The purpose of the work is to solve the problems of numerical determination of effective thermomechanical characteristics of anisotropic composite materials, development of new approaches, models and methods of research of the latest materials in the form of sandwich composites. Research methods – theoretical methods of homogenization of thermophysical properties of composite materials, computer methods of studying composite parameters, analytical methods based on beam theories, semi-analytical and numerical methods used for fracture tests of sandwich panels. A complex numerical technique is presented that allows determining the components of the temperature expansion tensor of fiber composites. Micromechanical analysis is performed on a periodically repeated representative volume based on the finite element method. Three different experimental methods used for fracture testing of sandwich panels are presented. These analytical, semi-analytical and numerical models can serve as highly accurate estimates of fracture parameters.

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Burlayenko Vyacheslav M
Vodka Oleksii О.
Lvov Serhii H
Mikhlin Yurii V.
Tkachuk Mykola M.

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2023-01-09