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Digital Library

of the European Council for Modelling and Simulation

 

Title:

Failure Analysis Of A Custom-Made Acetabular Cage With Finite Element Method

Authors:

Martin O. Doczi, Robert Szoedy, Peter T. Zwierczyk

Published in:

 

 

2020). ECMS 2020 Proceedings Edited by: Mike Steglich, Christian Muller, Gaby Neumann, Mathias Walther, European Council for Modeling and Simulation.

 

DOI: http://doi.org/10.7148/2020

ISSN: 2522-2422 (ONLINE)

ISSN: 2522-2414 (PRINT)

ISSN: 2522-2430 (CD-ROM)

 

ISBN: 978-3-937436-68-5
ISBN: 978-3-937436-69-2(CD)

 

Communications of the ECMS , Volume 34, Issue 1, June 2020,

United Kingdom

 

Citation format:

Martin O. Doczi, Robert Szoedy, Peter T. Zwierczyk (2020). Failure Analysis Of A Custom-Made Acetabular Cage With Finite Element Method, ECMS 2020 Proceedings Edited By: Mike Steglich, Christian Mueller, Gaby Neumann, Mathias Walther European Council for Modeling and Simulation. doi: 10.7148/2020-0250

DOI:

https://doi.org/10.7148/2020-0250

Abstract:

Research significance: In this paper, a custom made acetabular cage was studied in order to calculate the mechanical stresses of the implant. The goal is to have a validated finite element model, which can provide qualitatively accurate results.

Methodology: The geometry models of the acetabular cage, the pelvis and the fixation are based on the patient’s computer tomography data. The geometry models were made during a reverse engineering and surface modeling process.

The hemipelvis was modeled, according to the literature research. The boundary conditions, loading model, material properties were from the literature research as well.

Results: Analyzing the von Mises stresses of the acetabular cage and its screws, the most loaded areas could be detected. Viewing the first and the third principal stresses, the tensioned and the compression areas could be separated. With the patient’s control CT data, the results could be validated, analyzing the deformation of the cage, and the fracture of an implant. Discussion: The FE simulations of the acetabular cage provide results, which are consistent with observed implant failure.

 

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