Известия высших учебных заведений. Поволжский регион:Технические науки (Dec 2023)

Research of the influence of technological defects on the reinforcement of statistical stress fields in composite materials of quadrocopter blades

  • E.D. Kartashova

DOI
https://doi.org/10.21685/2072-3059-2023-3-13
Journal volume & issue
no. 3

Abstract

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Background. Improving designs, expanding the range and increasing the production of quadrocopters are stable global trends. Progressive technical solutions, new materials, modern microelectronics are used in the designs of quadrocopters. Composite materials are widely used in power elements of quadrocopters. So for the production of blades, polymeric layered composite materials are used. The use of new materials requires the development of calculation methods. The purpose of the research is to study the influence of technological defects on the formation of static stress fields, the results of which are used into account in the optimal design of quadrocopter blades from polymer layered composite materials. Materials and methods. Polymer layered composite materials consisting of fabric layers of carbon fibers were selected as the studied ones. Methods of composite mechanics, methods of deformable solid mechanics, methods of optimal design were used in the development of the methodology. Results. A methodology has been prepared to study the effect of technological defects on the formation of statistical stress fields, the results of which are taken into account during optimization when designing blades of quadrocopters made of polymer layered composite materials. The content of the methodology is revealed by an example. Conclusions. 1. The level of loading of the quadrocopter blade is determined by the nominal loads, the design values of the characteristics of the resistance of the composite to deformation and their spread. 2. Technological defects have an affect on the formation of statistical stress fields. They are the deviation of thickness, mass and porosity, as well as the deviation of the laying angles of fabric layers. 3. The main tasks solved within the framework of the design methodology are sensitivity analysis, multicriteria optimization, robustness assessment.

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