Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
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The in situ ply elasticity and strength in laminated composites

Published: 15.07.2020

Authors: Oleinikov A.I., Kuzmina T.A.

Published in issue: #7(103)/2020

DOI: 10.18698/2308-6033-2020-7-1996

Category: Aviation and Rocket-Space Engineering | Chapter: Design, construction and production of aircraft

When calculating thin-walled structures made of layered polymer composite materials (PCM), data obtained as data obtained from testing a corresponding separately cured unidirectional sheet is accepted as the elastic-strength characteristics of their monolayers. Properties of such sheet significantly differ from the characteristics of the monolayer polymerized and working together with adjacent layers of different orientations as part of a composite package. The article presents the results of solving the problem of determining the elastic and strength characteristics of monolayers according to the data of direct tensile — compression tests of PCM samples from witness parts. It considers PCM which monolayers have similar or diverse characteristics. Formulas are given for calculating the mechanical properties of monolayers as part of a multidirectional composite package. Comparison of calculation results with test data is carried out. The use of the actual characteristics of monolayers makes it possible to calculate the real behavior of the PCM in the structure, to link its verification and design calculations.

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