Determination of mode II cohesive law of bovine cortical bone using direct and inverse methods

被引：21
|
作者：
Pereira, F. A. M. [1 ]
de Moura, M. F. S. F. [2 ]
Dourado, N. [3 ]
Morais, J. J. L. [1 ]
Xavier, J. [1 ]
Dias, M. I. R. [4 ]
机构：
[1] CITAB UTAD, Dept Engn, P-5001801 Quinta De Prados, Vila Real, Portugal
[2] Univ Porto, Fac Engn, Dept Engn Mecan, Rua Dr Roberto Fritts, P-4200465 Porto, Portugal
[3] Univ Minho, Dept Engn Mecan, CMEMS UMinho, Campus Azurem, P-4804533 Guimaraes, Portugal
[4] CITAB UTAD, Dept Ciencias Vet, P-5001801 Vila Real, Portugal
来源：
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2018年 / 138卷
关键词：
Bovine cortical bone; Cohesive law; Mode II; End notched flexure; FRACTURE CHARACTERIZATION; DISPLACEMENT-FIELDS; CRACK-GROWTH; ZONE MODEL; DCB TEST; TOUGHNESS; SHEAR; IDENTIFICATION; STRENGTH; POROSITY;
D O I：
10.1016/j.ijmecsci.2018.02.009
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study presents two alternative methods to determine the cohesive law of bovine cortical bone under mode II loading, employing the End Notched Flexure (ENF) test. The direct method results from the combination of the progress of the mode II strain energy release rate with the crack tip shear displacement, obtained by digital image correlation. The resulting cohesive law is determined by differentiation of this relation relatively to the crack shear displacement. The inverse method employs finite element analyses with cohesive zone modelling, in association with an optimization procedure. The resulting strategy enables determining the cohesive law without establishing a pre-defined shape. The significant conclusion that comes out of this work is that both methods offer consistent results regarding the estimation of the cohesive law in bone. Given that the inverse method dispenses the use of sophisticated equipment to obtain the cohesive law in bone, it can be used as a more convenient procedure to accomplish efficient studies in the context of bone fracture characterization under mode II loading. (C) 2018 Published by Elsevier Ltd.
引用
收藏
页码：448 / 456
页数：9
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