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A 3D numerical simulation of stress distribution and fracture process in a zirconia‐based FPD framework
Author(s) -
Kou Wen,
Li Decong,
Qiao Jiyan,
Chen Li,
Ding Yansheng,
Sjögren Göran
Publication year - 2011
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31782
Subject(s) - weibull distribution , fracture (geology) , materials science , computer simulation , cubic zirconia , stress (linguistics) , ceramic , numerical analysis , ultimate tensile strength , structural engineering , composite material , computer science , engineering , mathematics , simulation , mathematical analysis , linguistics , statistics , philosophy
In this study, a numerical approach to the fracture behavior in a three‐unit zirconia‐based fixed partial denture (FPD) framework was made under mechanical loading using a newly developed three‐dimensional (3D) numerical modeling code. All the materials studied were treated heterogeneously and Weibull distribution law was applied to describe the heterogeneity. The Mohr‐Coulomb failure criterion with tensile strength cut‐off was utilized to judge whether the material was in an elastic or failed state. For validation, the fracture pattern obtained from the numerical modeling was compared with a laboratory test; they largely correlated with each other. Similar fracture initiation sites were detected both in the numerical simulation and in an earlier fractographic analysis. The numerical simulation applied in this study clearly described the stress distribution and fracture process of zirconia‐based FPD frameworks, information that could not be gained from the laboratory tests alone. Thus, the newly developed 3D numerical modeling code seems to be an efficient tool for prediction of the fracture process in ceramic FPD frameworks. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2011.