Experimental and numerical analysis of Izod impact test of cortical bone tissue
Experimental and numerical analysis of Izod impact test of cortical bone tissue
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DOI：
10.1140/epjst/e2012-01585-3
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
A. Abdel-Wahab;V. Silberschmidt
中科院分区：
文献类型：
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作者：
A. Abdel-Wahab;V. Silberschmidt
骨头只能承受一定的负荷，超过这个限度就会失效。通常，骨折的原因是外伤性跌倒，运动损伤，参与运输或工业事故。通过深入了解这些动态事件中该组织的变形和断裂行为，可以为正确治疗骨骼和预防其骨折提供支持。为了了解皮质骨组织的断裂行为，本文采用了实验与数值分析相结合的方法。通过实验研究了冲击弯曲载荷作用下皮质骨组织的瞬态动态特性。利用伊佐德冲击试验研究了不同皮质位置和缺口深度下吸收能量的变化。同时，利用商用有限元软件Abaqus实现的扩展有限元方法，模拟了采用Izod加载方案的皮质骨悬臂梁在冲击载荷下的裂纹萌生和扩展过程。仿真结果与实验数据吻合较好。
Bones can only sustain loads until a certain limit, beyond which they fail. Usually, the reasons for bone fracture are traumatic falls, sports injuries, and engagement in transport or industrial accidents. A proper treatment of bones and prevention of their fracture can be supported by in-depth understanding of deformation and fracture behavior of this tissue in such dynamic events. In this paper, a combination of experimental and numerical analysis was carried out in order to comprehend the fracture behavior of cortical bone tissue. Experimental tests were performed to study the transient dynamic behavior of cortical bone tissue under impact bending loading. The variability of absorbed energy for different cortex positions and notch depths was studied using Izod impact tests. Also, Extended Finite-Element Method implemented into the commercial finite-element software Abaqus was used to simulate the crack initiation and growth processes in a cantilever beam of cortical bone exposed to impact loading using the Izod loading scheme. The simulation results show a good agreement with the experimental data.