Study Of Aircraft Propeller - Structural Strength

Chin, Wai Pick (2010) Study Of Aircraft Propeller - Structural Strength. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

A propeller is part of the propulsive system of an aircraft. It is powered by an internal combustion engine which is used to turn propeller blades and transform rotary power into forward thrust. The rotating propeller, being one of the high risk parts of aircraft are constantly subjected to various dynamic loads. Therefore, it is often desired to analyze and check the strength of propeller to ensure safe operation. This project is purposed to analyze the propeller blade strength. It is carried out through two approaches, namely the theoretical approach and finite element method. The beam theory presented by D. W. Taylor has been employed and used in the theoretical analysis. Results obtained through calculations were tabulated and corresponding graphs were plotted to show the distribution of stress on the propeller blade. This approach suggested that stresses decrease in proportion toward the blade edges and with increase in blade radius from the center of hub. Meanwhile, the finite element method presented a more accurate result than the theoretically approach but still having results with similar trends as the theoretical approach. Both results are compared against each other and rational discussions are made. The result is used to compare against the material ultimate stress to obtain the safety factor for safe operation.

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