Prediction of microdamage formation using a mineral-collagen composite model of bone.
Prediction of microdamage formation using a mineral-collagen composite model of bone.
复制标题
使用骨矿物质-胶原复合模型预测微损伤形成。
DOI:
10.1016/j.jbiomech.2005.01.009
复制
发表时间:
2006
影响因子:
2.4
通讯作者:
Qian,Chunjiang
中科院分区:
文献类型:
--
作者:
Wang,Xiaodu;Qian,Chunjiang
Age-related changes in bone quality are mainly manifested in the reduced toughness. Since the post-yield deformation of bone is realized through microdamage formation (e.g., microcracking and diffuse damage), it is necessary to understand the mechanism of microdamage formation in bone in order to elucidate underlying mechanisms of age-related bone fractures. In this study, a two-dimensional shear lag model was developed to predict stress concentration fields around an initial crack in a mineral-collagen composite. In this model, non-linear elasticity was assumed for the collagen phase, and linear elasticity for the mineral. Based on the pattern of the stress concentration fields, the condition for microdamage formation was discussed. The results of our analyses indicate that: (1) an initial crack formed in mineral phase may cause stress concentration in the adjacent mineral layers; (2) the pattern of stress concentration fields depends not only on the spatial but also mechanical properties of the collagen and mineral phases; (3) the pattern of the stress concentration fields could determine either coalescence or scattering of nano cracks around the initial crack.
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DOI:
--
发表时间:
1995
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
作者:
Peter Zioupos;J. Currey;M. S. Mirza;D. Barton
通讯作者:
D. Barton
影响因子:
2.2
作者:
S. Kotha;S. Kotha;N. Guzelsu;N. Guzelsu
通讯作者:
N. Guzelsu
影响因子:
2.4
作者:
Vashishth, D;Tanner, KE;Bonfield, W
通讯作者:
Bonfield, W
影响因子:
2.2
作者:
Peter Zioupos;J. Currey;A. Sedman
通讯作者:
Peter Zioupos;J. Currey;A. Sedman
影响因子:
14
作者:
T. Harrigan;J. Reuben
通讯作者:
J. Reuben