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http://dx.doi.org/10.3744/SNAK.2011.48.6.539

A Study on the Fatigue Strength of Propeller Blades  

Nho, In-Sik (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
Lee, Chang-Sup (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.48, no.6, 2011 , pp. 539-543 More about this Journal
Abstract
Recently, to reduce the noise and vibration levels of ships, high skewed marine propellers with thinner thickness are adopted widely, however, such propeller design trend causes to reduce the strength of blades. Propeller blades are rotating continuously in irregular wake field of ships. So, it is necessary to examine the strength of them precisely including from a viewpoint of fatigue strength. In present paper, the fatigue strength of propeller blades was investigated. Firstly, fatigue tests for Al Bronze, the representative propeller material, were carried out. The S-N curve was obtained for the assessment of the fatigue crack initiation life. And the material properties C, m for the fatigue crack propagation analysis based on the Paris' equation were derived. For the 2nd stage, the structural responses of propeller blades in irregular ship wake field was carried out using the finite element analysis code. And the fatigue strength of propeller blades were considered based on the calculated stress levels and material characteristics for fatigue strength.
Keywords
Propeller blade; Finite element structural analysis; Fatigue strength analysis; Fatigue test; S-N approach; Crack propagation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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3 ASTM E 647, 1988. Standard test method for measurement of fatigue crack growth rates, Annual book of ASTM standard.
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7 Nho, I.S., Lee, C.S. & Kim, M.C., 1989. A Fimite Element Dynamic Analysis of Marine Propeller Blades, Proceeding of PRADS'89, Varna Bulgaria