Mixed-mode loading of the cement-bone interface: a finite element study

Daan Waanders, Dennis Janssen, Katia Bertoldi, Kenneth A. Mann, Nico Verdonschot

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

While including the cement–bone interface of complete cemented hip reconstructions is crucial to correctly capture their response, its modelling is often overly simplified. In this study, the mechanical mixed-mode response of the cement–bone interface is investigated, taking into account the effects of the well-defined microstructure that characterises the interface. Computed tomography-based plain strain finite element analyses models of the cement–bone interface are built and loaded in multiple directions. Periodic boundaries are considered and the failure of the cement and bone fractions by cracking of the bulk components are included. The results compare favourably with experimental observations. Surprisingly, the analyses reveal that under shear loading no failure occurs and considerable normal compression is generated to prevent interface dilation. Reaction forces, crack patterns and stress fields provide more insight into the mixed-mode failure process. Moreover, the cement–bone interface analyses provide details which can serve as a basis for the development of a cohesive law.
Original languageEnglish
Pages (from-to)145-155
Number of pages11
JournalComputer methods in biomechanics and biomedical engineering
Volume14
Issue number2
DOIs
Publication statusPublished - 2011

Keywords

  • IR-92443
  • METIS-283567

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