Composite materials are gaining more and more importance, as they have become indispensable in aerospace and military applications. But they have also become strongly established in the automotive industry and in the manufacture of sports equipment.
Due to the increasing replacement of classical construction materials by composite materials and their inhomogeneity, challenges arise in the field of determining material properties. In this thesis the method for determining the effective modulus of elasticity of a layered composite sandwich structure is presented. The stress and strain state in the cross section of a composite beam is considered. Samples of a layered composite sandwich structure were fabricated and a 3-point bending test was performed on them. A comparative analysis was performed between the results of the analytical calculation, carried out with the known mechanical properties of each component of the composite, and the results of the experimental test. Due to the good comparability of the results, it can be argued that it is theoretically possible to predict the effective modulus of elasticity of composite materials very well from the known mechanical properties of the components.
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