Mechanical behaviour of femoral bones in bending loading.
Mechanical behaviour of femoral bones in bending loading.
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DOI：
10.1016/0021-9290(86)90021-7
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发表时间：
1986
影响因子：
2.4
通讯作者：
M. Martens;R. Van Audekercke;P. de Meester;J. Mulier
中科院分区：
文献类型：
--
作者：
M. Martens;R. Van Audekercke;P. de Meester;J. Mulier
一系列的33个人股骨已经在高应变率下进行了四点弯曲试验。识别出两种不同的失效模式。纯弯矩引起的中间区域的Y形断裂在载荷-变形曲线处产生非线性区，并产生较高的弯曲力，与在结构的远端三分之一处较不频繁发生的倾斜断裂相比，结构的更多变形和断裂的更高应变能导致在载荷下没有“塑性”部分的失效。基于简单均匀梁模型的弯曲模量和最大弯矩的估计值与实验确定的值显示出高的相关系数。Y型断口的扫描电子显微镜检查显示材料在结构水平上的变形和空隙形成。这可以解释在失效之前广泛的非弹性变形。
A series of 33 human femoral bones have been subjected to a four point bending test at high strain rates. Two different failure modes were recognized. A Y shaped fracture at the middle region induced by a pure bending moment yielded a zone of non-linearity at the load vs deformation curve and a higher bending force, more deformation of the structure and higher strain energy to fracture compared with the less frequently occurring oblique fracture at the distal third of the structure resulting in a failure without a ‘plastic’ portion at the load-deformation curve.Estimated values of bending modulus and maximum bending moment based upon a simple uniform beam model showed high correlation coefficients with the experimentally determined values. Scanning electron microscopic examination of the Y fracture showed distortion and void formation of the material at the structural level. This could explain the extensive non-elastic deformation prior to failure.