| 摘要: |
| 生物医用孔隙结构植入体的发展影响着人类的健康。 当植入体与人体骨骼组织间出现体液缺失,即发生干滑动摩擦时,会出现肿胀、发炎等症状。 为了减缓这种痛苦,有必要研究生物医用孔隙结构在干摩擦下的磨损行为。 基于有限元方法建立了增材制造孔隙结构 Ti-6Al-4V 干滑动摩擦计算模型,通过运动规律及模型转化计算所需的运动学和动力学边界条件。 应用三角数学建模创建模型、利用微积分理论及曲线拟合综合推算磨损量,通过仿真得到的位移矢量和、旋转矢量和、摩擦力和摩擦热综合分析 3 种孔隙结构摩擦学性能的优劣,并对磨损量进行试验验证。 结果表明: 3 种孔隙结构位移矢量和与旋转矢量和的排队顺序为三角形孔隙结构﹥无序孔隙结构﹥正方形孔隙结构。 无序孔隙结构具有最优的摩擦学性能,三角形孔隙结构次之,正方形孔隙结构相对最差,孔隙结构越与人体原生骨组织接近其耐磨性能越优。 研究结果将为生物医用植入体孔隙结构的选择提供参考,对实际应用有着重要意义。 |
| 关键词: 增材制造 Ti-6Al-4V 摩擦 有限元 孔隙结构 生物医用 骨组织 |
| DOI：10.11933/j.issn.1007-9289.20201120001 |
| 分类号:TH117 |
| 文章编号:1007-9289(2020)06-0037-10 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51871220) |
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| Finite Element Analysis of Mechanical and Dry Friction Behavior of Biomedical Titanium Alloy with Pore Structure Fabricated by Additive |
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Xu Jingzhong1,2, Lv Xiaoren1, Li Shujun2
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1.School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870 , China;2.Institute of Metals, Chinese Academy of Sciences, Shenyang 110870 , China
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| Abstract: |
| Human health is affected by the development of biomedical porous implants. Dry sliding friction occurs when body fluid is lost between implant and human bone tissue. This phenomenon leads to swelling, inflammation and other symptoms. In order to alle- viate the pain, it is necessary to study the wear behavior of biomedical pore structure under dry friction. The dry sliding friction calcu- lation model of Ti-6Al-4V with additive manufacturing pore structure is established based on the finite element method. The kinematic and dynamic boundary conditions are calculated by the motion law and model transformation. The wear amount is calculated by trigono- metric mathematical modeling, calculus theory and curve fitting. Furthermore, through the comprehensive analysis of the three model- ing methods of tribological performance, the displacement vector sum, rotation vector sum, friction and friction heat are obtained by simulation, the amount of wear is verified by experiments. The results show that the order of displacement vector sum and rotation vec- tor sum of the three pore structures is triangular pore structure > disordered pore structure > square pore structure. The disordered pore structure has the best tribological performance, the triangular pore structure takes the second place, and the square pore structure is the worst. It is proved that the closer the pore structure is to human bone, the better the wear resistance is. It will provide a reference for the choice of pore structure of biomedical implants, which is of great significance for practical application. |
| Key words: additive manufacturing Ti-6Al-4V friction ansys pore structure biomedical bone tissue |
