Issue 50

M.R.M. Aliha et alii, Frattura ed Integrità Strutturale, 50 (2019) 602-612; DOI: 10.3221/IGF-ESIS.50.51 602 Focused on Structural Integrity and Safety: Experimental and Numerical Perspectives Experimental fracture resistance study for cracked bovine femur bone samples M.R.M. Aliha Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST), Narmak, 16486-13114, Tehran, Iran mrm_aliha@iust.ac.ir , https://orcid.org/0000-0001-9451-0949 Hussein Ghazi Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. Farkhondeh Ataei School of Progress Engineering, Iran University of Science and Technology (IUST), Narmak, 16486-13114, Tehran, Iran A BSTRACT . Crack growth and brittle fracture is one of the major failure modes in bone materials and therefore understanding the fracture behavior and affecting parameters on the crack growth resistance of bone is necessary for biomechanics researchers. In this paper, mode I fracture toughness value for the left and right femur bones of same bovine were measured experimentally using several single edge notch bend beam specimens (SENB) subjected to three-point bend loading in dry condition. The SENB specimens were cut along the longitudinal axis of bone but from different hoop directions. Fracture toughness results of sample prepared from the frontal part of bone were higher than the back or side sections. Depending on the location of sample, the fracture toughness of femur bone was varied from 5 to 10 MPa m . Furthermore, the results obtained for similar location of both left and right femur bones were nearly identical. The fracture energy ( G f ) of the tested specimens was also measured and it was found that a linear relation can be fitted to the ( K Ic ) 2 versus G f results of the tested bovine bone. K EYWORDS . Fracture toughness; Fracture energy; Bovine femur bone; Experimental study. Citation: Aliha, M.R.M., Ghazi, H., Ataei, F., Experimental fracture resistance study for cracked bovine femur bone samples, Frattura ed Integrità Strutturale, 50 (2019) 602-612. Received: 09.05.2019 Accepted: 26.08.2019 Published: 01.10.2019 Copyright: © 2019 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION one is a quasi-brittle and orthotropic material, which in practice can be subjected to different types of mechanical loads inside the body of human or animal with different rates ranging from static to dynamic or even impact loads. Thus these materials are usually vulnerable to failure and catastrophic fracture. Because of applied loads and stresses, B