Finite Element Modeling And Injury Repair Analysis Of Articular Cartilage Based On Fiber Content

Articular cartilage is a very thin layer of smooth and translucent connective tissue,which is a product of constant optimization in human evolution process.It’s main functions are to bear the physiological load generated between the articular surfaces and to perform lubrication during frictional process.Because of the absence of blood vessels and lymphatics inside the cartilage,it is difficult to heal itself in the event of injury and may thus induce osteoarthritis.In modern society,the incidence of osteoarthritis caused by articular cartilage damage is increasing,which brings great burden to both individuals and families.It has great guiding significance for the prevention of osteoarthritis and the mechanical state of cartilage after tissue engineering repair to study the relationship between the mechanical properties of cartilage and its structure.And the finite element method can be used to analyze the mechanical state of cartilage.This article first combined with the complex physiological structure of articular cartilage.Because the collagen fibers located near the cartilage surface in the cartilage are almost all parallel to the cartilage surface,this article considered both the consideration of the solid phase,liquid phase,fiber-reinforced phase in the cartilage and the influence of the contents of major fibers and minor fibers near the cartilage surface.Based on these,a tangential zone of cartilage was established,and a certain improvement and optimization of the fiber-reinforced porous elastic model was performed.The ABAQUS software and the Fortran language were used to complete the establishment of the model on the basis of the improved model,and then the established model was used to simulate and be compared with experiments performed by other scholars,which thus verified the validity of the model.Finally,the established cartilage finite element model was applied as follows.1.The model was used to perform finite element analysis of different degrees of repairable depth under sliding conditions to explore differences in mechanical properties of different repairable depths when sliding,so as to select the best repairable depth for cartilage.2.Finite element analysis of full-thickness repaired cartilage under local and global compression,by selecting different elastic moduli for the implant cartilage,analyze the optimal range of elastic modulus of the implanted cartilage,and compare the mechanical properties of the two different loads at the same compression depth gives a more complete picture of the mechanical state of the cartilage after compression,provides a theoretical basis for clinical pathology.