Abstract Mechanical properties of human bone vary immensely depending on the type of bone and loads. Scaffolds manufactured by electron beam melting allow matching some of those mechanical properties. Different types of porous titanium alloy structures (body-centred-cubic: ‘BCC’; normal cubic: ‘cubic’ and cubic fabricated to 45°: ‘cross’), with different porosities were fabricated, to examine their mechanical properties under compression and torsional loads. Cubic structures were also analysed by finite element method for different load directions. As expected, cubic structures showed values of strength and stiffness higher than the BCC and cross structures when the load acted vertically. On the other hand, it was appreciated that the mechanical properties for torsion are better in cross structures than in cubic structures, which opposes the observations of the compression tests. Computational analysis showed that the cubic structures evolved from buckling to bending deformation with the decrease of the inclination of the loads with regard to their horizontal axis. In conclusion, it is suggested that all load directions that a scaffold is subjected to should be taken into account, in addition to other types of loads that may appear, such as torque, when designing and choosing the ideal typology in the reconstruction of bone defects.

中文翻译：

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载荷方向和载荷类型对多孔 Ti6Al4V 生物材料力学性能的影响

摘要 人体骨骼的力学性能因骨骼类型和载荷的不同而有很大差异。通过电子束熔化制造的支架可以匹配其中一些机械性能。不同类型的多孔钛合金结构（体心立方：'BCC'；正常立方：'立方'和立方制造到45°：'交叉'），具有不同的孔隙率，以检查它们在压缩和压缩下的机械性能扭转载荷。还通过有限元方法对不同载荷方向的立方结构进行了分析。正如预期的那样，当载荷垂直作用时，立方结构的强度和刚度值高于 BCC 和交叉结构。另一方面，人们认识到交叉结构的扭转力学性能比立方结构更好，这与压缩测试的观察结果相反。计算分析表明，随着载荷相对于其水平轴的倾角减小，立方结构从屈曲变形演变为弯曲变形。总之，建议在设计和选择骨缺损重建的理想类型时，除了可能出现的其他类型的负载（例如扭矩）之外，还应考虑支架所承受的所有负载方向。 .