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Experimental validation of a nonlinear μ FE model based on cohesive‐frictional plasticity for trabecular bone
Author(s) -
Schwiedrzik J.,
Gross T.,
Bina M.,
Pretterklieber M.,
Zysset P.,
Pahr D.
Publication year - 2016
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.2739
Subject(s) - trabecular bone , nonlinear system , materials science , stiffness , plasticity , compression (physics) , anisotropy , finite element method , tension (geology) , model validation , structural engineering , computational model , biomedical engineering , mechanics , composite material , computer science , engineering , simulation , osteoporosis , physics , medicine , data science , quantum mechanics , endocrinology
Summary Trabecular bone is a porous mineralized tissue playing a major load bearing role in the human body. Prediction of age‐related and disease‐related fractures and the behavior of bone implant systems needs a thorough understanding of its structure–mechanical property relationships, which can be obtained using microcomputed tomography‐based finite element modeling. In this study, a nonlinear model for trabecular bone as a cohesive‐frictional material was implemented in a large‐scale computational framework and validated by comparison of μ FE simulations with experimental tests in uniaxial tension and compression. A good correspondence of stiffness and yield points between simulations and experiments was found for a wide range of bone volume fraction and degree of anisotropy in both tension and compression using a non‐calibrated, average set of material parameters. These results demonstrate the ability of the model to capture the effects leading to failure of bone for three anatomical sites and several donors, which may be used to determine the apparent behavior of trabecular bone and its evolution with age, disease, and treatment in the future. Copyright © 2015 John Wiley & Sons, Ltd.