Implementation of asymmetric yielding in case-specific finite element models improves the prediction of femoral fractures

Loes C. Derikx, Roeland Vis, Vincent T. Meinders, Nicolaas Jacobus Joseph Verdonschot, Esther Tanck

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)

Abstract

Although asymmetric yielding in bone is widely shown in experimental studies, previous case-specific non-linear finite element (FE) studies have mainly adopted material behaviour using the Von Mises yield criterion (VMYC), assuming equal bone strength in tension and compression. In this study, it was verified that asymmetric yielding in FE models can be captured using the Drucker–Prager yield criterion (DPYC), and can provide better results than simulations using the VMYC. A sensitivity analysis on parameters defining the DPYC (i.e. the degree of yield asymmetry and the yield stress settings) was performed, focusing on the effect on bone failure. In this study, the implementation of a larger degree of yield asymmetry improved the prediction of the fracture location; variations in the yield stress mainly affected the predicted failure force. We conclude that the implementation of asymmetric yielding in case-specific FE models improves the prediction of femoral bone strength.
Original languageEnglish
Pages (from-to)183-193
Number of pages11
JournalComputer methods in biomechanics and biomedical engineering
Volume14
Issue number2
DOIs
Publication statusPublished - 2011

Keywords

  • METIS-271232
  • IR-92444

Fingerprint Dive into the research topics of 'Implementation of asymmetric yielding in case-specific finite element models improves the prediction of femoral fractures'. Together they form a unique fingerprint.

  • Cite this