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ANALYSIS OF ELASTICITY OF A LAMINATED COMPOSITE WITH ANISOTROPIC HETEROMODULAR LAYERS

Volumen 49, Ausgabe 8, 2018, pp. 889-901
DOI: 10.1615/TsAGISciJ.2018029567
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ABSTRAKT

When developing experimental models in the field of aeroelasticity, the use of composite materials is expanding, allowing us to provide the required accuracy for modeling modern aircraft. The share of composite molding tool is also increasing, which improves the manufacturability of parts and resource saving. To estimate the stiffness characteristics of aeroelastic models, it is necessary to determine the elastic properties of composites. The problem of determining the elastic parameters of a composite material in terms of the prepreg monolayer constants is solved below. The relationship between the stress-strain state of the composite and the stresses (strains) of individual layers is considered. The change in the composite stiffness when changing the direction of uniaxial tension or compression is described. For different layouts and numbers of reinforcement directions, the effect of the combination of stress signs in monolayers on the composite properties is analyzed. The calculated data are compared with the test data.

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