NDLI: Modeling of Stiffness and Strength of Bone at Nanoscale

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Abueidda, Diab W. Sabet, Fereshteh A. Jasiuk, Iwona M.
Copyright Year	2017
Abstract	Two distinct geometrical models of bone at the nanoscale (collagen fibril and mineral platelets) are analyzed computationally. In the first model (model I), minerals are periodically distributed in a staggered manner in a collagen matrix while in the second model (model II), minerals form continuous layers outside the collagen fibril. Elastic modulus and strength of bone at the nanoscale, represented by these two models under longitudinal tensile loading, are studied using a finite element (FE) software abaqus. The analysis employs a traction-separation law (cohesive surface modeling) at various interfaces in the models to account for interfacial delaminations. Plane stress, plane strain, and axisymmetric versions of the two models are considered. Model II is found to have a higher stiffness than model I for all cases. For strength, the two models alternate the superiority of performance depending on the inputs and assumptions used. For model II, the axisymmetric case gives higher results than the plane stress and plane strain cases while an opposite trend is observed for model I. For axisymmetric case, model II shows greater strength and stiffness compared to model I. The collagen–mineral arrangement of bone at nanoscale forms a basic building block of bone. Thus, knowledge of its mechanical properties is of high scientific and clinical interests.
Starting Page	051006
Ending Page	051010
Page Count	5
File Format	PDF
ISSN	01480731
e-ISSN	15288951
Journal	Journal of Biomechanical Engineering
Volume Number	139
Issue Number	5
DOI	10.1115/1.4036314
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	2017-04-06
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bone Elastic moduli Finite element analysis Fracture (Materials) Fracture (Process) Mechanical properties Minerals Modeling Nanoscale phenomena Plane strain Platelets Separation (Technology) Stiffness Stress Traction
Content Type	Text
Resource Type	Article
Subject	Physiology (medical) Biomedical Engineering

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