Research Of Fatigue And Fracture Performance Of Mine Winder Axle Based On Numerical Simulation

The economical loss and personal casualties will be given rise when mine winder axle fractured. In view of the importance of working safety, the stress-strain field in several working condition, the life of fatigue crack deforming and the life of transverse crack developing and the parameters of crack driving force containing longitudinal crack is studied in detail in this thesis. Theoretical basis of integrity evaluation criterion of mine winder axle is established to certain extent.Finite element numerical solution of fatigue life of mechanical member and of stress intensity factor K and J-integral for 3D model is approached with ANSYS software. An important method is made for the fatigue analysis and fatigue performance of winder axle.The stress-strain field of winder axle in various working conditions is analyzed and mechanics performance of stress concentration region is studied, which provides reference for its fatigue analysis.Numerical solution of the life of fatigue crack deforming is undertaken and ANSYS order flow of fatigue life is obtained.According to arc profile and feature of surface crack, the approach of "circularity transformed to square" is brought forward, which makes the finite computation module of winder axle containing surface crack simplify. It is indicated from the approach of "circularity transformed to square" about finite element module that stress distribution and fatigue life of the axis containing surface crack and square structure in equal real constant are in the same range, which is the evidence of reliability of the means. Moreover, fatigue life with various crack depth is gained by numerical computation.It is indicated from research of the stress-strain field and fracture parameter including K and J-integral of winder axle by the submodel technique of ANSYS that stress concentration is not explicit in crack tip region when longitudinal crack located in centre line and is evident when close to surface is obtained. The fracture parameters such as stress intensity factor K and J-integral become larger when the location is more closely to surface.