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Applied Bionics and Biomechanics - Volume 2015 2015, Article ID 609132, 6 pages -

Research Article

Shandong Experimental High School, Jinan, Shandong 25001, China

State Key Laboratory of Geomechanics and Geotechnical Engineering, IRSM, Chinese Academy of Sciences, Wuhan 430071, China

Qilu Hospital of Shandong University, Jinan, Shandong 250012, China

Received 18 June 2014; Revised 28 January 2015; Accepted 29 January 2015

Academic Editor: Jan Harm Koolstra

Copyright © 2015 Yuxi Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In order to understand the fracture mechanisms of bone subjected to external force well, an experimental study has been performed on the bovine bone by carrying out the three-point bending test with 3D digital image correlation DIC method, which provides a noncontact and full field of displacement measurement. The local strain and damage evolution of the bone has been recorded real time. The results show that the deflection measured by DIC agrees well with that obtained by the displacement sensor of the mechanical testing machine. The relationship between the deflection and the force is nearly linear prior to reaching the peak strength which is about 16 kN for the tested bovine tibia. The full-field strain contours of the bone show that the strain distribution depends on not only the force direction, but also the natural bone shape. The natural arched-shape bovine tibia bone could bear a large force, due to the tissue structure with high strength, and the fracture propagation process of the sample initiates at the inner side of the bone first and propagates along the force direction.





Autor: Yuxi Chen, Diansen Yang, Yongshang Ma, XianJun Tan, Zhan Shi, Taoran Li, and Haipeng Si

Fuente: https://www.hindawi.com/



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