Mechanical Behavior of Bovine Cortical Bone Tissue under Tension, Compression and Shear Loading
Mechanical Behavior of Bovine Cortical Bone Tissue under Tension, Compression and Shear Loading
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牛皮质骨组织在拉伸、压缩和剪切载荷下的力学行为
DOI：
10.11395/aem.4.0_141
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yuji Tanabe
中科院分区：
文献类型：
--
作者：
Jonas A. Pramudita;Ippei Shimizu;Yuji Tanabe
骨折损伤是各种事故中的常见损伤。在事故中，骨可能受到单一载荷或多种载荷的组合，例如拉伸、压缩和剪切。在本研究中，我们对骨组织标本进行拉伸、压缩和剪切试验，以获得皮质骨组织的力学和破坏特性。骨标本取自牛股骨。利用股骨的哈弗氏骨部分制作了三种试件，分别进行了拉伸、压缩和剪切试验。试验采用配有定制夹具的台式万能试验机，位移速率为1 mm/min。根据试验结果，可以得出载荷-位移曲线和应力-应变曲线。曲线的变化得到了证实。弹性模量和破坏点也有显著差异。骨组织的破坏强度被认为取决于加载模式。胶原纤维被认为具有强的抗张力性，而羟基磷灰石被认为具有强的抗压缩性。此外，载荷方向对股骨轴向也有影响，弹性模量和失效点。胶原纤维在标本中的取向被认为是导致差异的一个因素。
Bone fracture injury frequently occurs in various accidents. During an accident, bone may be subjected to a single load or combination of multiple loads, eg tension, compression and shear. In this study, we conducted tension, compression and shear tests on bone tissue specimens in order to obtain the mechanical and failure characteristics of cortical bone tissue. Bone specimens were obtained from bovine femur. Haversian bone part of the femur was utilized to manufacture three kinds of specimens for tested in tension, compression and shear tests. The tests were conducted using a table-top universal testing machine equipped with custom-made jigs under a displacement rate of 1 mm/min. From the test result, load-displacement curves and stress-strain curves could be derived. Variations in the curves were confirmed. There were also notable differences in the elastic moduli and failure points. The failure strength of bone tissue was considered to be dependent on the loading modes. Collagen fiber was considered to have a strong resistance against tension, whereas hydroxyapatite was considered to have a strong resistance against compression. In addition, the direction of load against femoral axis was also found to have influences on the elastic modulus and failure point. The orientation of collagen fibers in the specimens was considered to be a factor that caused the differences.