Postfailure modulus strongly affects microcracking and mechanical property change in human iliac cancellous bone:​ a study using a 2D nonlinear finite element method

Wang, Xiang; Zauel, Roger R.; Fyhrie, David P.

Affiliations

¹Lawrence J. Ellison Musculoskeletal Research Center, University of California Davis Medical Center, Room 2000, Research Facility I, 4635 Second Avenue, Sacramento, CA 95817, USA

¹Henry Ford Hospital, Detroit, MI 48202, USA

Abstract and keywords

A two-dimensional (2D) finite element (FE) method was used to estimate the ability of bone tissue to sustain damage as a function of postfailure modulus. Briefly, 2D nonlinear compact-tension FE models were created from quantitative back-scattered electron images taken of human iliac crest bone specimens. The effects of different postfailure moduli on predicted microcrack propagation were examined. The 2D FE models were used as surrogates for real bone tissues. The crack number was larger in models with higher postfailure modulus, while mean crack length and area were smaller in these models. The rate of stiffness reduction was greater in the models with lower postfailure modulus. Hence, the current results supported the hypothesis that hard tissue postfailure properties have strong effects on bone microdamage morphology and the rate of change in apparent mechanical properties.

Keywords: finite element; Compact-tension; Bone mineralization; Trabecular bone; Microcrack

Links

DOI: 10.1016/j.jbiomech.2008.06.011

PubMed: 18672244

WoS: 000259552700008

History

Accepted: 2008-06-12

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Cited By (6)

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2013	Harrison NM, McDonnell P, Mullins L, Wilson N, O’Mahoney D, McHugh PE. Failure modelling of trabecular bone using a non-linear combined damage and fracture voxel finite element approach. Biomech Model Mechanobiol. April 2013;12(2):225-241.
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