Biomechanicsi And Friction Properties Of A New Type Of Artificial Femoral Head

Joint and articular cartilage injuries are common bone structure injuries in daily life.At present,the most effective clinical treatment for this situation is joint replacement.The research in this article involves the design of new artificial femoral heads and the mechanical and tribological properties of related materials.The finite element simulation is used to analyze the force of the structure under load and the liquid phase flow characteristics inside the material.Subsequent improvements and innovations in new-type artificial femoral heads give full support.This article starts from the structure and performance of natural femoral head,and imitates the multi-layer structure of natural femoral head.Based on the study of the structure and performance of natural cartilage layer,a suitable artificial material is selected to simulate the function and structure of natural cartilage.Through special design and selection of materials,a better-performing artificial femoral head is finally obtained,and it is expected to improve the quality of life of the relevant patients.In response to this goal,this article has launched related research from the following aspects:(1)Modeled on the natural femoral head joint,the design of the new femoral head adopts a similar multi-layered gradient design with a bionic cartilage layer.Through the combination of various materials,the self-lubricating performance,bearing performance and friction performance of artificial femoral head are improved.(2)Study the performance of the materials involved in the new artificial femoral head.Polyvinyl alcohol hydrogels(PVA-H)with different PVA concentrations were prepared by physical cross-linking method and chemical cross-linking method,and related experiments were performed to verify the preparation method and the PVAconcentration on the water content,wettability and tensile properties of PVA-H Influence of mechanical properties such as extension and compression.(3)On the basis of PVA-H performance research,the related research on the prepared carbon nanotubes/polyvinyl alcohol composite hydrogels was carried out.Different proportions of multi-walled carbon nanotubes were mixed into PVA-H to prepare carbon nanotubes/polyvinyl alcohol composite hydrogels with different concentration ratios.The enhanced phase(multi-walled carbon nanotubes)was tested to PVA through experiments.-H performance iMPact,and the effect of different concentration ratios on the performance of PVA-H.(4)Under different friction test conditions,the friction and wear characteristics of PVA-H and carbon nanotube/polyvinyl alcohol composite hydrogel were coMPared.(5)Use finite element analysis to conduct fluid-structure coupling analysis.Through the property settings(permeability,porosity,etc.)and boundary settings of the material,simulation analysis is performed by computer,and comprehensive analysis is performed with the test results.Finally,the research contents of the subject are summarized and prospected,and the subsequent improvement and innovation are guided through the analysis of the research contents.