TY - JOUR
T1 - Fracture toughness of bone using a compact sandwich specimen
T2 - Effects of sampling sites and crack orientations
AU - Wang, Xiaodu
AU - Agrawal, C. Mauli
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1996/3
Y1 - 1996/3
N2 - The energy required to propagate a crack through bone can be estimated in terms of its fracture toughness, which is an intrinsic property and an important measure of the material's susceptibility to fracture. However, in the past detailed fracture toughness characterization of bone has been limited due to specimen size limitations. To address this issue the present study used a compact sandwich specimen and examined the variation in fracture toughness of bovine femoral bone as a function of testing sites and crack orientations. Two crack orientations, radial and circumferential, and three testing sites situated along the thickness of bone were investigated. The results indicated that there were statistically significant differences in fracture toughness between the testing sites for both radial and circumferencial cracks. Crack orientation also appeared to influence the fracture toughness at two of the test sites. The microstructure of bone and its fracture surface morphology were examined using microscopy and exhibited differences corresponding to the differences in fracture toughness, thus suggesting a correlation between microstructure and fracture toughness.
AB - The energy required to propagate a crack through bone can be estimated in terms of its fracture toughness, which is an intrinsic property and an important measure of the material's susceptibility to fracture. However, in the past detailed fracture toughness characterization of bone has been limited due to specimen size limitations. To address this issue the present study used a compact sandwich specimen and examined the variation in fracture toughness of bovine femoral bone as a function of testing sites and crack orientations. Two crack orientations, radial and circumferential, and three testing sites situated along the thickness of bone were investigated. The results indicated that there were statistically significant differences in fracture toughness between the testing sites for both radial and circumferencial cracks. Crack orientation also appeared to influence the fracture toughness at two of the test sites. The microstructure of bone and its fracture surface morphology were examined using microscopy and exhibited differences corresponding to the differences in fracture toughness, thus suggesting a correlation between microstructure and fracture toughness.
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U2 - 10.1002/(SICI)1097-4636(199621)33:1<13::AID-JBM3>3.0.CO;2-P
DO - 10.1002/(SICI)1097-4636(199621)33:1<13::AID-JBM3>3.0.CO;2-P
M3 - Article
C2 - 8734069
AN - SCOPUS:0030110826
VL - 33
SP - 13
EP - 21
JO - Journal of Biomedical Materials Research - Part A
JF - Journal of Biomedical Materials Research - Part A
SN - 0021-9304
IS - 1
ER -