Cohesive zone modelling of mineralized collagen fibril arrays in bending

Lai, Zheng Bo, Oloyede, Adekunle, & Yan, Cheng (2012) Cohesive zone modelling of mineralized collagen fibril arrays in bending. In Gu, YuanTong & Saha, Suvash C. (Eds.) Proceedings of the 4th International Conference on Computational Methods, Queensland University of Technology, Crowne Plaza, Gold Coast, QLD.

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Abstract

Hard biological materials such as bone possess superior material properties of high stiffness and toughness. Two unique characteristics of bone microstructure are a large aspect ratio of mineralized collagen fibrils (MCF), and an extremely thin and large area of extrafibrillar protein matrix located between the MCF. The objective of this study is to investigate the effects of:

(1) MCF aspect ratio, and (2) energy dissipation in extrafibrillar protein matrix on the mechanical behaviour of MCF arrays.

In this study, notched specimens of MCF arrays in extrafibrillar protein matrix are subjected to bending. Cohesive zone model was implemented to simulate the failure of extrafibrillar protein matrix. The study reveals that the MCF array with a higher MCF aspect ratio and the MCF array with a higher protein energy dissipation in the interface direction are able to sustain a higher bending force and dissipate higher energy.

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ID Code: 59408
Item Type: Conference Paper
Refereed: Yes
Keywords: Bone, Extrafibrillar Protein Matrix, Mineralized Collagen Fibril, Cohesive Zone Model, Finite Element Method
ISBN: 9781921897542
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomaterials (090301)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Composite and Hybrid Materials (091202)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Information Systems
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 [please consult the author]
Deposited On: 25 Apr 2013 22:25
Last Modified: 01 May 2013 21:14

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