| Abstract [eng] |
The main objective of the final project is to investigate the mechanical properties of the safety cabin fragment in accordance with the International Federation of Powerboats guidelines and to compare the experimental, analytical and calculation results. Initially, the fabrics for composites and the properties of epoxy resin were reviewed. The degradation criteria for composite materials were also presented and the strength prediction of sandwich composite structures was analyzed. An analysis of fiber weave angles and the influence of multi-layer carbon fiber fabrics and their weave angles on the mechanical properties was carried out. In the following section, the materials used in the fabrication of the protected cabin were described. The weight of each fabric without epoxy resin and the weights of the laminate were described, as well as the laminate thicknesses and the countries of manufacture of the fabrics. The following section gave an overview of the requirements for the manufacture of the test sample, the testing methodology and the testing requirements. The manufacturing process of the cockpit fragment was described in detail. Following the fabrication of the samples, three different composites were tested on a universal testing machine. Finite element models were subsequently designed in the “Solidworks” environment and replicated the tests carried out in the laboratory. Analytical deflection values were calculated and the results of all tests and calculations were compared with each other. Finally, a 3D model of the safety cockpit was designed and verified using the finite element method in the “Ansys” software environment. |
