Stress rate and creep behaviors of cancellous bone under uniaxial compression

doi:10.3969/j.issn.2095-4344.2017.31.016

Abstract

Abstract:

BACKGROUND: Cancellous bone, as an important part of bone, is a kind of porous, inhomogeneous, anisotropic and viscoelastic structure, which plays a critical role in load transmission and energy absorption. Therefore, research on its mechanical properties is of great significance.

OBJECTIVE: To investigate the compressive properties of cancellous bone at different stress rates and its creep behaviors at different stress levels.

METHODS: The fresh cancellous bone from pig femur was used as the material, and subjected to different stress until the compressive strain of sample was up to 5%. The constant compressive stress levels were loaded on the surface of cancellous bone for 7 200 s to observe its creep behaviors.

RESULTS AND CONCLUSION: (1) In the uniaxial compression test, the stress values and Young’s modulus increased with the stress rate increasing under the same strain value. (2) The stress-strain curves of cancellous bone were different at different loading rates, indicating that the mechanical properties of cancellous bone depend on the loading rate. (3) In the creep test, the creep strain increased with the increase of stress level, but the creep compliance decreased with the increase of stress level. (4) These results suggest that the stress rate and stress level have significant influence on compressive properties of cancellous bone, which provide reference for avoiding cancellous bone injury.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Stress, Mechanical, Biomechanics, Tissue Engineering

CLC Number:

R318

Wei Chao-lei, Gao Li-lan, Zhang Chun-qiu, Liu Dong-dong, Jiang Wang-biao. Stress rate and creep behaviors of cancellous bone under uniaxial compression[J]. Chinese Journal of Tissue Engineering Research, 2017, 21(31): 5014-5018.

Figures/Tables 3

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