A combination of continuum damage mechanics and the finite element method to analyze acrylic bone cement cracking around implants

N.J.J. Verdonschot, R. Huiskes

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Samenvatting

We present a method to simulate acrylic bone cement damage accumulation around implants. The method combines the finite element method (FEM) with the theory of continuum damage mechanics (CDM). Damage was considered a tensorial variable, resulting in anisotropic material behavior when the material was damaged. The method was applied to an axi-symmetric structure, consisting of a taper pushed in a cement mantle. Varying the taper/cement interface conditions revealed that these had considerable effects on the damage process. Not only the mechanical endurance of the structure changed, but also the way in which damage progressed was affected. Two mesh densities were considered, to study the effects of mesh refinement. It was concluded that, although further research is required to obtain more realistic survival times, the method can be used on a comparative, qualitative basis. It predicts, pre-clinically, sites where cement damage is initiated, how this process progresses, and the effects of design parameters of implants on the mechanical endurance of the structure.
Originele taal-2Engels
TitelComputer methods in biomechanics and biomedical engineering
RedacteurenJ. Middleton, M.L. Jones, G.N. Pande
Plaats van productieAmsterdam
UitgeverijGordon and Breach Science Publishers
Pagina's25-33
Aantal pagina's570
ISBN van geprinte versie2-919875-00-0
StatusGepubliceerd - 1996

Publicatie series

NaamComputer methods in biomechanics and biomedical engineering
Volume1

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