Study On Biomechanical And Tribological Properties Of Composite Artificial Hip Joint Materials

The hip joint ranks first in the incidence of joints,and many patients suffer from pain every year.With the development of medical science and materials science,the performance of artificial hip joints can meet various standards of hip arthroplasty.The initial use of stainless steel to prepare hip prosthesis,a long-term clinical observation feedback an important problem,this type of prosthesis formed a lot of metal abrasive particles will activate the bone marrow cells.The bone marrow cells not only phagocytose the metal abrasive particles,but also decompose and absorb the bone tissue around the prosthesis,resulting in failure of the stability of the prosthesis,and finally the prosthesis implantation failure.Through the wear test and clinical test of various materials,ceramics,polymer materials and metal alloys meet the requirements of the hip joint for material properties.Artificial hip joints are mainly made of these three materials.However,these three materials have their advantages and disadvantages:ceramic brittle fracture,polymer material is not wear-resistant,metal alloy abrasive particles have certain toxicity,in view of the shortcomings of these commonly used materials,this paper designs a new type of composite artificial hip joint,And study the material properties.In order to meet the requirements of material properties for composite artificial hip joints,it is necessary to study the material properties.On the one hand,some biomechanical tests are carried out to test the tensile strength of the material to ensure that the material can withstand a certain degree of tensile strength;on the other hand,some tribological experiments are performed,and in the human body,the surface topography of the artificial hip joint cannot be obtained in real time.Data and analysis of the wear mechanism of the prosthetic contact surface.Only under laboratory conditions,by simulating the motion characteristics of the human hip joint and thetissue fluid environment,the friction coefficient was tested using an artificial hip joint simulator,and the surface of the material after the experiment was observed by a scanning electron microscope,and elemental analysis was performed on the surface of the material.Analysis of its friction and wear mechanism is beneficial to optimize the friction properties of the material.The fluid-solid coupling analysis of the material block was carried out by using the finite element software ABAQUS to obtain the deformation of the material,the stress strain and the velocity of the internal liquid phase.By comparing the biomechanical experimental data of the materials,the reasons for the results were analyzed by biomechanical analysis,which gave a sufficient reference for the study of the properties of composite multi-layer artificial hip joint materials.In this paper,a new type of composite artificial hip joint is designed.Each layer is made of materials with different properties,and its comprehensive performance is studied.It is ensured by various experimental studies that it has high friction resistance,high strength and Good stability,resulting in excellent hip joints for hip patients.