Numerical modelling and experimental determination of the dynamic behaviour of composite structures
نویسندگان
چکیده
Composite materials are finding increasing application in mechanical systems because of their desirable physical characteristics compared with metals; for example, high strengthand stiffness-to-weight ratios, and the potential for constructing complex shapes without joints or extensive machining. In addition, the dynamic behaviour of composite structures can be manipulated by judicious selection of their constituent materials and structural features. This study investigates the dynamic behaviour of fibre-reinforced polymer hydrofoils using finite element analysis and experimental modal analysis. Four hydrofoils were made from different combinations of carbon, glass and aramid fibres to assess the influence of fibre type and fibre orientation on the hydrofoil’s dynamic response. Numerical and experimental results showed good agreement for low-order modes. However, the results highlighted difficulties in determining higher-order modes accurately in both the numerical and experimental investigations. Fibre type and orientation were shown to appreciably affect the dynamic properties of the hydrofoil.
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