Establishment And Damage Analysis Of Finite Element Model In Elbow Joint

Objective The three-dimensional finite element model(FEM)of the elbow joint is established by the finite element method,including the soft tissue structures such as humerus,ulna,radius,ligament,cartilage and interosseous membrane,which provide the basis for further research on the biomechanics of the elbow joint.Analysis the biomechanics of the collision when the elbow joint hits the ground at different angles.The mechanism and biomechanical properties of elbow joint were studied.Methods Healthy young male volunteers who had no previous injuries of elbow joint and forearm and related disease history were eliminated by X-ray,CT and MRI of elbow joint and forearm.The elbow joint flexing 90 degrees were preserved in DICOM format,Mimics,Geomagic,UG and other software.Abaqus and Hypermesh software was used to simulate the injuries of the elbow joint when impact from different angulation produced.the critical velocity of fracture of bone cortex and the velocity of significant rupture were calculated by analyzing its failure behavior,and the biomechanical properties of the elbow joint in the impact process were analysed.Results The finite element model of the elbow joint established by using the finite element method has been further optimized to provide a basic model for the biomechanical study of elbow joint injury.The stress conduction is mainly concentrated in the humerus condyle,the humerus trochlea and the ulna olecranon when the elbow flexion 90 degree is affected by the frontal impact,while the stress conduction of the radial head is smaller.The critical velocities of cortical rupture were 11.4m/s,9.3m/s,and 13.8m/s when the angulations were 30°,60°,and 90° respectively.When the impact velocities were speeded up to 15m/s,13m/s,18m/s respectively,the humerus or olecranon was obvious fracture.Conclusions The finite element model of human elbow joint constructed using finite element modeling analysis software can be used to study the mechanism of elbow joint injury under external force and clinical treatment of elbow joint fracture.By analyzing the biomechanical changes of stress and strain in the injury of the elbow joint,a new method and way is provided to deduce the size,speed and direction of the violence.