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Numerical Simulation of Fatigue Crack Growth in Hip Implants

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    0461706 - ÚGN 2017 RIV NL eng J - Journal Article
    Colic, K. - Sedmak, A. - Grbovic, A. - Burzić, M. - Hloch, Sergej - Sedmak, S.
    Numerical Simulation of Fatigue Crack Growth in Hip Implants.
    Procedia Engineering. Roč. 149, č. 149 (2016), s. 229-235. E-ISSN 1877-7058.
    [International Conference on Manufacturing Engineering and Materials, ICMEM 2016. Nový Smokovec, 06.06.2016-10.06.2016]
    R&D Projects: GA MŠk ED2.1.00/03.0082; GA MŠk(CZ) LO1406
    Institutional support: RVO:68145535
    Keywords : biomedical application design * extended finite element method (XFEM) * Ti-6Al-4V alloy * stress intensity factor (SIF) * fatigue crack growth
    Subject RIV: JQ - Machines ; Tools

    In this paper numerical analysis of hip replacement implant behaviour from a fracture mechanics perspective is presented. It is necessary to understand the fatigue crack initiation and propagation characteristics in order to prevent catastrophic failure of the implant. For the simulation of crack propagation extended finite element method (XFEM) was used, as being one of the most advanced modeling techniques for this type of problem. Short theoretical background information on the XFEM is provided, as well as the representation of crack and the stress intensity factors computation. For chosen titanium alloy hip implants numerical modeling and analysis were done in ABAQUS software. It is shown that is possible to assume hip implant mechanical behaviour to the existence of defects such as cracks by application of numerical simulation crack behaviour. The numerical results illustrate that XFEM is efficient for the simulation of crack propagation in complicated biomedical structures, without the need to re-mesh during the propagation if the finite element mesh is well defined.
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