仿生织构表面对人工髋关节副动压润滑性能及减摩性分析

doi:10.3901/JME.2021.11.102

机械工程学报 ›› 2021, Vol. 57 ›› Issue (11): 102-111.doi: 10.3901/JME.2021.11.102

• 特邀专栏：生物组织精准手术器械设计制造 • 上一篇下一篇

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仿生织构表面对人工髋关节副动压润滑性能及减摩性分析

郑清春^1,2, 毛璐璐^1,2, 史于涛^1,2, 张春秋^1,2, 胡亚辉^1,2

1. 天津理工大学天津市先进机电系统设计与智能控制重点实验室天津 300384;
2. 天津理工大学机电工程国家级实验教学示范中心天津 300384

收稿日期:2020-12-11 修回日期:2021-01-15 出版日期:2021-06-05 发布日期:2021-07-23
通讯作者: 胡亚辉(通信作者),女,1972年出生,博士,教授。主要研究方向为新材料切削机制。E-mail:huyahuilg@126.com
作者简介:郑清春,男,1971年出生,博士,教授,博士研究生导师。主要研究方向为生物材料切削机理与技术,计算机集成制造。E-mail:zhengqingchunlg@126.com;毛璐璐,女,1995年出生。主要研究方向为微织构化人工髋关节表面的减摩与润滑。E-mail:1025364117@qq.com
基金资助:
国家自然科学基金资助项目（62073239，11672208）。

Analysis of Biomimetic Texture Surface on Dynamic Compression Lubrication and Friction Reduction of Artificial Hip Pair

ZHENG Qingchun^1,2, MAO Lulu^1,2, SHI Yutao^1,2, ZHANG Chunqiu^1,2, HU Yahui^1,2

1. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, Tianjin University of Technology, Tianjin 300384;
2. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384

Received:2020-12-11 Revised:2021-01-15 Online:2021-06-05 Published:2021-07-23

摘要/Abstract

摘要： 为提高钛合金TC4人工髋关节假体的耐磨性，从仿生学角度在钛合金关节表面设计出菱形织构。基于雷诺方程建立织构化关节表面流体动压润滑数学模型，采用有限差分法对其进行离散，通过Matlab编程进行迭代求解，获取织构表面的润滑油膜压力分布以及织构化关节表面的摩擦因数，分析织构几何参数（菱形织构对角线长度b和织构深度h_p）对摩擦性能的影响规律。加工钛合金销-盘摩擦副，用激光在盘试样上加工出菱形织构，并在牛血清润滑状态下以及相同载荷和转速的条件下进行摩擦磨损试验。结果表明：随着菱形织构参数b和织构深度h_p的增加，摩擦因数呈先增加后减小的趋势。并且试验结果与数值仿真结果具有较高的一致性，在菱形织构参数b为447 μm，织构深度h_p为10 μm，存在最小摩擦因数为0.14。微织构的存在可以实现流体动压润滑，提高关节副的承载力，降低摩擦因数，从而改善关节副的摩擦性能。该研究为提高人工髋关节的寿命提供理论依据。

关键词: 人工髋关节, 钛合金, 菱形织构, 流体动压润滑, 摩擦性能, 承载力

Abstract: In order to improve the wear resistance of the titanium alloy TC4 artificial hip joint prosthesis, a diamond texture was designed on the surface of the titanium alloy joint from the perspective of bionics. Based on the Reynolds equation, a mathematical model of hydrodynamic lubrication of the textured joint surface is established. Applying the finite difference method to discretize the model, and the oil film pressure distribution and friction coefficient on the textured joint surface is obtained by Matlab programming. The influence of texture geometric parameters (diamond diagonal length b and depth h_p) on friction performance is analyzed. The titanium alloy pin-disc friction pair was machined, first. Then the diamond texture was machined on the disc sample by laser. Finally, the friction and wear test are carried out under the condition of bovine serum lubrication and the same load and rotational speed. The results show that with the increase of diamond texture parameter b and depth h_p, the friction coefficient first increases and then decreases; the test results have a high consistency with the numerical simulation results; the texture parameter b is 447 μm, the texture depth h_p is 10 μm, and the minimum friction coefficient is 0.14. The existence of diamond texture can realize fluid dynamic pressure lubrication on the surface of joint pair, improve the bearing capacity of the joint pair, reduce the friction coefficient, and thus improve the friction performance of the joint pair. This study provides the theoretical basis for improving the life of artificial hip joint.

Key words: artificial hip joint, titanium alloy, diamond texture, hydrodynamic lubrication, friction performance, bearing capacity

中图分类号:

TH781

郑清春, 毛璐璐, 史于涛, 张春秋, 胡亚辉. 仿生织构表面对人工髋关节副动压润滑性能及减摩性分析[J]. 机械工程学报, 2021, 57(11): 102-111.

ZHENG Qingchun, MAO Lulu, SHI Yutao, ZHANG Chunqiu, HU Yahui. Analysis of Biomimetic Texture Surface on Dynamic Compression Lubrication and Friction Reduction of Artificial Hip Pair[J]. Journal of Mechanical Engineering, 2021, 57(11): 102-111.

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仿生织构表面对人工髋关节副动压润滑性能及减摩性分析

Analysis of Biomimetic Texture Surface on Dynamic Compression Lubrication and Friction Reduction of Artificial Hip Pair

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