Design, Manufacturing and Testing of a Bone Shaft Fatigue Machine

Year 2019, , 657 - 662, 01.08.2019

Ahmet Çağatay Çilingir

https://doi.org/10.16984/saufenbilder.516631

Abstract

To determine the mechanical properties of materials subjected to repetitive
loading, fatigue testing is a well–established method in engineering studies.
It is believed that the cause of stress fractures in cortical bone are due to
the repetitive loading. There is currently no cost–effective device that
accounts for the variety of factors influencing the fatigue behaviour of bone in
vivo. The Bone Shaft Fatigue Machine is proposed as a possible solution and
designed as a rotating bending fatigue tester with a constant stress amplitude.
Sheep metatarsal bone shaft specimens designed and machined for fatigue tests. The
results were determined to be in accordance with the expected fatigue stresses
and cycles reported in current literature. The Bone Shaft Fatigue Machine was
also found to be cost-effective and applicable to the testing of materials in
research areas other than the study of cortical bone.

Keywords

bone, fatigue

References

• [1] Muller, J.A., et al. Anisotropic analysis of in – vivo strain gauge data yield clues about fatigue fracture during normal activity. Transactions of the 50th Annual Orthopaedic Research Society. (2004).
• [2] Augut, P., et al. Distal radius fractures: mechanics of injury and strength prediction by bone mineral assessment. Journal of Orthopaedic Research. 16. (1998): 629 –635.
• [3] Cao, K.D., et al. Load sharing within a human lumbar vertebral body using the finite element method. Spine. 26. (2001): E253 – 60.
• [4] Lotz, J.C., et al. Fracture prediction for the proximal femur using finite element models: part II – nonlinear analysis. Journal of Biomechanics. 113. (1991): 361 –365
• [5] Carter, D. R., et al. Fatigue behavior of adult cortical bone: the influence of mean strain and strain range. Acta Orthopaedica Scandinavica. 52. (1981): 481 – 490.
• [6] Zioupos. P., et al. Fatigue strength of human cortical bone: age, physical, and material heterogeneity effects. Journal of Biomedical Materials Research Part A. 86. (2008): 627 – 636.
• [7] Lafferty, J.F., and P.V.V. Raju. The influence of stress frequency on the fatigue strength of cortical bone. Journal of Biomechanical Engineering. 101. (1979): 112 – 113.
• [8] Morais, J.J.L, et al. The double cantilever beam test applied to mode I fracture characterization of cortical bone tissue. Journal of the Mechanical Behavior of Biomedical Materials. 3. (2010): 446 – 453
• [9] Crowninshield, R.D. and M.H. Pope. The response of compact bone in tension at various strain rates. Annals of Biomedical Engineering. 2. (1973): 217 – 225
• [10] Currey, J.D. The effects of strain rate, reconstruction, and mineral content on some mechanical properties of bovine bone. Journal of Biomechanics. 8. (1975): 81 –86.
• [11] Socie, D.F. and G.B. Marquis. Multiaxial fatigue. Society of Automotive Engineers Inc.,Warrendale, PA. (2000).
• [12] Lafferty, J.F. Analytical model of the fatigue characteristics of bone. Aviation, Space, and Environmental Medicine. (1978): 170 – 174
• [13] George, W.T. and D. Vashishth. Influence of phase angle between axial and torsional loadings on fatigue fractures of bone. Journal of Biomechanics. 38. (2005): 819 – 825
• [14] Vashishth, D., W.T. George. Damage mechanisms and failure modes of cortical bone under components of physiological loading. Journal of OrthopaedicResearch. 23. (2005): 1047 – 1053
• [15] Vashishth, D., et al. Fatige of cortical bone under combined axial – torsional loading. Journal of Orthopaedic Research. 19. (2001): 414 – 420
• [16] Zimmerman, E.A., et al. Mixed – mode fracture of human cortical bone. Biomaterials. 30. (2009). 5877 – 5884.
• [17] Cowin, S.C and M.L. Moss. Mechanosensory Mechanisms in Bone. Bone Mechanics Handbook. 2. (2001).
• [18] Matthias, K. and J.R. Kelly. Influence of loading frequency on implant failure under cyclic fatigue conditions. Dental Materials. 25. (2009): 1423 – 1432.
• [19] Forster, H., and Fisher, J. 1999. The influence of continuous sliding and subsequent surface wear on the friction of articular cartilage, Proc.Inst. Mech. Eng. [H], 213, 329–345
• [20] Northwood, E., and Fisher, J. 2007. A multi-directional in vitro investigation into friction, damage and wear of innovative chondroplasty materials against articular cartilage, Clinical Biomechanics, 22, 834-842
• [21] Saffar, KPA, JamilPour, N and Rajaai SM. “How Does The Bone Shaft Gemometry Affect its Bending Properties?”. American Journal of Appied Sciences. Vol. 6(3), pp.463-470, 2009.
• [22] Islam, A, Chapin K, Moore E, Ford J, Rimnac C, Akkus O. “Gamma Radiation Sterilization Reduces the High-cycle Fatigue Life of Allograft Bone”. Clinical Orthopaedics and Related Research. Vol.473 (11), pp.827, 2016.