Finite element torsional buckling analysis of shafts with non-concentric bores

• Published in: Proceedings of the Institution of Mechanical Engineers. Part G, Journal of aerospace engineering Vol. 215; no. 5; pp. 279 - 289
• Main Authors: Robotham, W S, Hyde, T H, Williams, E J
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.01.2001; SAGE PUBLICATIONS, INC
• Subjects: Buckling; Elasticity; Failure analysis; Finite element method; Loads (forces); Mathematical models; Plasticity; Shafts (machine components); Torque; Torsional stress; buckling; non-concentric bores; finite element analysis; shafts
• ISSN: 0954-4100; 2041-3025
• DOI: 10.1243/0954410011533275

Abstract The demand for more powerful and efficient aeroengines results in the need to design improved main driveshafts. The design requirement may be to increase the torque capacity of the shafts, to reduce the outer diameter or to reduce the weight. Meeting these requirements tends to increase the likelihood of the shaft buckling and research was carried out to investigate the factors influencing the torsional buckling of shaft sections in order to provide an improved analysis method applicable to typical gas turbine aeroengine shafts. This paper uses finite element analysis to examine the effect of bore concentricity on the elastic-plastic buckling of shafts subjected to pure torsional loading. Equations were developed to predict the buckling torque for a range of shaft geometries and levels of bore eccentricity.