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| Azevedo, Nuno Monteiro |
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Kondratiev, Andrii
O.M. Beketov National University of Urban Economy in Kharkiv
in Cooperation with on an Cooperation-Score of 37%
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Publications (5/5 displayed)
- 2023Optimal Process Parameters of the Binder to Reduce Air Pollution and to Improve the Emission Effect from Composite Production
- 2023Effect of Ply Orientation on the Mechanical Performance of Carbon Fibre Honeycomb Corescitations
- 2022Determination of the Composite Panel Moulding Pressure Valuecitations
- 2022Effect of Heating Conditions during Moulding on Residual Stress–Strain Behaviour of a Composite Panelcitations
- 2021Study of Stress-Strain Behavior of the Laminated Plate Damaged by Delaminationcitations
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article
Effect of Ply Orientation on the Mechanical Performance of Carbon Fibre Honeycomb Cores
Abstract
Carbon fibres used as a honeycomb core material (subject to a proper in-depth analysis of their reinforcement patterns) allows solving the thermo-dimensional stability problem of the units for space systems. Based on the results of numerical simulations with the support of finite element analysis, the paper provides an evaluation of the accuracy of analytical dependencies for the determination of the moduli of elasticity of a carbon fibre honeycomb core in tension/compression and shear. It is shown that a carbon fibre honeycomb reinforcement pattern has a significant impact on the mechanical performance of the carbon fibre honeycomb core. For example, for honeycombs measuring 10 mm in height, the maximum shear modulus values corresponding to the reinforcement pattern of +/- 45 degrees exceed the minimum values for a reinforcement pattern of 0 degrees and 90 degrees by more than 5 times in the XOZ plane and 4 times for the shear modulus in the YOZ plane. The maximum modulus of the elasticity of the honeycomb core in the transverse tension, corresponding to a reinforcement pattern of +/- 75 degrees, exceeds the minimum modulus for the reinforcement pattern of +/- 15 degrees more than 3 times. We observe a decrease in the values of the mechanical performance of the carbon fibre honeycomb core depending on its height. With a honeycomb reinforcement pattern of +/- 45 degrees, the decrease in the shear modulus is 10% in the XOZ plane and 15% in the YOZ plane. The reduction in the modulus of elasticity in the transverse tension for the reinforcement pattern does not exceed 5%. It is shown that in order to ensure high-level moduli of elasticity with respect to tension/compression and shear at the same time, it is necessary to focus on a reinforcement pattern of +/- 64 degrees. The paper covers the development of the experimental prototype technology that produces carbon fibre honeycomb cores and structures for aerospace applications. It is shown by experiments that the use of a larger number of thin layers of ...