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Develop Methods of Life Wheel Locomotive Using Finite Element Method
Prhami, Esmat | 2010
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 40755 (45)
- University: Sharif University of Technology
- Department: Aerospace Enginnering
- Advisor(s): Adib Nazari, Saeed
- Abstract:
- The first project ,paid to review and analysis types of crack and agents Also, was referred methods to control them in rail industry .
The wheel of Alestom train and UIC60 rail were simulated and stress analysis by software FEM (ANSYS and ABAQUS) , and effect of various parameters such as applied forces , train wheel diameter , contact position and rail inclination on stress values was studied . For comparision of results has been used analytic Hertz theory .
By using experimental data on the subsurface crack , those cracks were created in the wheel . For load on the modeling wheel and rail, ,assuming contact on the wheel rolling point , were used vertical load of wagon weight ( with coefficient for the equivalent static load with a maximum dynamic load) and driving torque on the wheel (constant velocity).
Wheel with rolling motion on the rail , was impressed fatigue reload , that by simulation crack by ABAQUS and review the possibility of using LEFM , assuming reload with constant amplitude , was calculated stress intensity factor for main tips of crack and has been determined the modes of crack deformation and more these coefficients were equivalent using Tanaka model and finally , the number of cycle to growth a crack was calculated by formula Walker - Keywords:
- Elliptical Crack ; Fatigue Life ; Fatigue Crack Growth Rate ; Stress Intensity Factor ; Linear Elastic Fracture Mechanics ; Rolling Motion Wheel and Rail ; Failure Due to Fatigue ; Elasto-Plastic Fracture Mechanism (EPFM)
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