Surface structuring to reduce friction & wear at low congruency ceramic sliding pairings

表面结构化以减少摩擦

• 批准号: 419981660
• 负责人: Professor Dr. Jan Philippe Kretzer
• 金额: --
• 依托单位: Klinik für Orthopädie und Unfallchirurgie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/419981660?language=en
• 关键词: Surface; structuring; reduce; friction; wear

The long-term objective is the universal use of textured ceramic-ceramic bearing couples for artificial joint replacement in order to improve the durability of the protheses. As part of the research project applied for, surface structures for favorable lubrication conditions and reduced friction are to be defined and optimized by analyizing the mechanisms of action. For this purpose, a complex an validated simulation model imitating an experimental test setup should be developed to analyze a variety of structures with regard to the mechanisms of action between the surface topography and the lubrication conditions and to derive optimal surface structures respecting active load collectives. The aim is to gradually approximate the geometry of anatomical joints and biomechanical load collectives in order to carefully evaluate the influence of varying structures. The simulation results are to be continously verfied and complimented by experimental friction and wear tests. In the applied research project, the results of the preliminary study should also be taken into account where for a flat-on-flat configuration with low surface pressure and dimple structuring, a friction reduction of 23% and a wear reduction of 48% could be achieved. The aim is to achieve for low-congruent contacts under complex, biomechanical load collectives. a final friction reduction of 40% and a reduction in wear of 60%

长期目标是在人工关节置换术中普遍使用纹理陶瓷-陶瓷关节面对，以提高假体的耐久性。作为申请研究项目的一部分，通过分析作用机制，定义和优化有利于润滑条件和减少摩擦的表面结构。为此，应开发一个模拟实验测试装置的复杂的验证模拟模型，以分析各种结构的表面形貌和润滑条件之间的作用机制，并获得最佳的表面结构，尊重主动负载集体。其目的是逐渐接近解剖关节的几何形状和生物力学载荷集合，以仔细评估不同结构的影响。模拟结果还有待于摩擦磨损试验的不断验证和补充。在应用研究项目中，还应考虑初步研究的结果，其中对于具有低表面压力和凹坑结构的平对平配置，可以实现23%的摩擦减少和48%的磨损减少。其目的是在复杂的生物力学载荷集体下实现低一致性接触。最终摩擦减少40%，磨损减少60%