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Question

4.Buteven cortical bone has pores; and although reasonably homogeneous whenconsidered over a macroscopic volume, it is certainly not isotropie. Along thegrain of its structure,

theaxial direction in the cortex, both strength and elastic moduli areconsiderably higher than in both the radial and tangential directions, up tosome 50%. For cancellous bone the deviations are even worse, as at the levelwhere it matters, that of the trabecular architecture, it is a structure,rather than a material. The consequencesBiomechanics, Bone Quality and Strength
ofthis are visualized, which sterns from a finite element analysis computersimulation of a compression test, Evidently, the stress distribution in thebone sampie is not homogeneous, as was presumed in the evaluation above. Theforce applied on the upper face of the cube is transferred through the sampieas water flows from a hill through its gullies after rain fall: some trabeculaecarry much of the load, some carry nothing, and some
onlya little. Although the sample as a whole is loaded in compression, some individualtrabeculae are loaded in tension, and many in bending To what extent can we treat cancellous boneas a material, and apply the associated principles of mechanics?

Answer 1

但是，骨皮质有孔隙；虽然合理均匀的在宏观体积，它肯定是不均。在它的结构物，在皮质轴方向，强度和弹性模量比较高于中的径向和切向方向上，在50%。松质骨的偏差，更糟糕的是，在这方面，骨小梁结构，它是一个结构，而不是一种物质。它表示了骨质量和强度的，这是直观的，它出自一个压缩试验，有限元分析比较明显，骨样品的应力分布是不均匀的，因为据信在以上评价。的力量施加在立方体的上表面是通过降雨从山上通过其沟道水流转移：一些实验表明许多负荷，有没有，有的有一点。虽然样本作为一个整体受压，一些装的压力很大，许多弯曲到什么程度才能治疗松质骨材料应用，是力学的相关原理？