Fatigue Crack Initiation and Propagation in SuperCMV Hollow Shafts with Transverse Holes

Abstract:

A fatigue crack growth test program has been carried out on hollow, SuperCMV shaft specimens, with transverse holes, under combined torsional and axial loading. The experimental results show that fatigue cracks always initiated in the stress concentration areas, i.e., in the transverse holes. Up to four cracks were observed to be initiated at different positions near the holes in the shafts. The fatigue crack propagation was initially found to occur under Mode I conditions, followed by a period of mixed Mode II/III crack growth. Three dimensional, finite element, elastic-plastic analyses have also been conducted, in an attempt to predict the crack-initiation locations and lives. The predicted crack-initiation sites agree with the experimental observations, for a range of loading conditions. The initiation sites were found to be approximately on the planes of maximum principal stress. The predicted, torque-dominated, fatigue lives of the shafts, obtained by use of a stress-life (S-N) approach, correlate reasonably well with the experimental results.

• Periodical: Applied Mechanics and Materials (Volume 70)
• Pages: 141-146
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.70.141
• Online since: August 2011
• Authors: Ran Li, W. Sun, Thomas H. Hyde, Edward J. Williams, Xing Guo Wang
• Keywords: Crack Growth, Fatigue Crack Initiation, Finite Element Model (FEM), Hollow Shaft, S/CMV

References

[1] W. Robotham, Y. Hong, T. H. Hyde, and E. J. Williams: Proc. Instn. Mech. Engrs. Part G: J. of Aerospace Engineering Vol. 219(2010), pp.208-219.

[2] T. Ford: Aircr. Engng and Aerospace Technol. Vol. 69 (1997), pp.555-560.

[3] M. W. Brown and K. J. Miller: Fatigue Fracture Engng Mater. Structures Vol. 1 (1979), pp.231-246.

[4] C. T. Hua and D. F. Socie: Fatigue Fracture Engng Mater. Structures Vol. 7 (1984), pp.165-179.

[5] I. Takashi, N. Kohsoku and O. Yuichi, in: Proceeding of 7th International Conference on Nuclear Engineering, edited by JSME, Tokyo (1999).

[6] K. Tanaka, S. Matsuoka and M. Kimura: Fatigue Fracture Engng Mater. Structures Vol. 7 (1984), pp.195-211.

[7] K. Tanaka, H. Takahash and Y. Akiniwa: Int. J. Fatigue Vol. 28 (2006), pp.324-334.

[8] T. Yokobori, A. Kamei and A.T. Yokobori: Int. J. Fracture Vol. 12 (1976), pp.158-160.

[9] ABAQUS 6. 9 Standard User Manual, ABAQUS Inc, USA (2009).

[10] S. B. Lean, I. Richardson, I. McColl, E. J. Williams and T. H. Hyde: J. Strain Anal. Eng. Des. Vol. 36 (2001), pp.481-497.

[11] D. L. McDiarmid: Fatigue Fracture Engng Mater. Structures Vol. 9 (1987), pp.457-475.

[12] A. R. Maligno, S. Rajaratnam, S. B. Leen, E.J. Williams: Eng. Frac. Mech. Vol. 77 (2010), pp.94-111.

[13] ASME N47-12 in: Annual Book of ASME, edited by ASME, New York (1979).

[14] Y. S. Garud: Multiaxial Fatigue of Metals (Stanford University, USA 1981).

[15] Y. S. Garud: J. Eng. Mater. Technol. Vol. 103 (1981), pp.118-125.

[16] B. V. Day: Stresses at Oblique Holes in Thick Plates and Cylinders (University of Nottingham, UK 1971).

[17] T. R. Hyde: Development of a Representative Specimen for Fretting Fatigue of Spline Joint Couplings (University of Nottingham, UK 2002).

[18] S. Suresh: Fatigue of Materials (Cambridge University Press, UK 1998).