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  3. روش های تعمیم عمر چرخ لکوموتیو با استفاده از روش اجزای محدود
روش های تعمیم عمر چرخ لکوموتیو با استفاده از روش اجزای محدود
1625 viewed

روش های تعمیم عمر چرخ لکوموتیو با استفاده از روش اجزای محدود

پرهامی، عصمت Prhami, Esmat

Develop Methods of Life Wheel Locomotive Using Finite Element Method

Prhami, Esmat | 2010

1625 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40755 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Enginnering
  6. Advisor(s): Adib Nazari, Saeed
  7. Abstract:
  8. 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
  9. Keywords:
  10. 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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