Publisher DOI: 10.1016/j.commatsci.2013.06.028
Title: Towards bio-inspired engineering materials : modeling and simulation of the mechanical behavior of hierarchical bovine dental structure
Language: English
Authors: Bargmann, Swantje 
Scheider, Ingo 
Xiao, Tao 
Yilmaz, Ezgi D. 
Schneider, Gerold A. 
Huber, Norbert  
Keywords: Bovine teeth; Cohesive zone model; Dental enamel; Fracture behavior; Size effect
Issue Date: 19-Jul-2013
Publisher: Elsevier
Source: Computational Materials Science (79): 390-401 (2013)
Abstract (english): 
Dental enamel is the outermost layer of a tooth crown consisting of a hierarchical and graded structure. Approx. 85 vol.% of enamel consist of the hydroxyapatite mineral, the rest being protein and water. This contribution is concerned with the modeling and computation of the mechanical behavior, in particular with the failure, of the enamel of a bovine tooth. For the underlying model description, we resort to a non-linear Neo-Hookean model for the mineral and to the Arruda-Boyce model for the protein, in combination with a cohesive zone approach. The model accounts for non-linear, large-deformation kinematics and softening at the first level hierarchy, and it is validated against experimental data. The numerical implementation is carried out with the help of the finite element method. Here, we resort to a three-dimensional cohesive zone model which maps cracking of the mineral fibers as well as debonding between the mineral fiber and the protein. A complex microstructure representing bovine enamel is studied in the numerical examples. The results capture major features of the physical experiments, such as non-linear stress-strain behavior, stiffness and failure strength. © 2013 Published by Elsevier B.V.
ISSN: 1879-0801
Journal: Computational Materials Science 
Institute: Kontinuums- und Werkstoffmechanik M-15 
Keramische Hochleistungswerkstoffe M-9 
Document Type: Article
Project: Untersuchung des Deformations- und Bruchverhaltens der hierarchischen Ebenen von Zahnschmelz 
SFB 986: Teilprojekt A06 - Herstellung und Charakterisierung hierarchischer, multi-funktionaler Keramik/Metall-Polymer Materialsysteme 
SFB 986: Teilprojekt B04 - Mikromechanisches Materialverhalten hierarchischer Werkstoffe 
SFB 986: Teilprojekt B06 - Modellierung und Simulation der Interphaseneigenschaften von Kompositwerkstoffen aus Metall und Polymer auf der Nanoskala 
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