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DOI Prefix 10.20431 |
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International Journal of Modern Studies in Mechanical Engineering
Thermoplastic J Integral Calculation for a Semi-Elliptical Crack in the Railway Wheel
Azadeh Haidari1,Mojtaba Heidari2
1.Center of excellence in railway transportation, Iran University of Science and Technology,Tehran, Iran.
2.College of mechanical engineering, Isfahan University of technology. Iran, Isfahan
2.College of mechanical engineering, Isfahan University of technology. Iran, Isfahan
Citation :Azadeh Haidari,Mojtaba Heidari, Thermoplastic J Integral Calculation for a Semi-Elliptical Crack in the Railway Wheel International Journal of Modern Studies in Mechanical Engineering 2017,3(2) : 6-16
Abstract
This paper provides a method for addressing surface crack growth in railway wheels, taking into account rail and brake blocks effects. finite element analysis (FEA) using the J-integral crack tip parameter has been employed to study 3-D semi elliptical crack growth in the railway wheel with strain hardening property, subjected to fatigue loading due to axle load, rail-wheel contact forces, motive torque, brake blocks pressure, friction and its resulting thermal loads of braking. For this purpose, a FE model of a wheel, with two brake shoes and a portion of rail are created and realistic loads and boundary conditions, which may correctly model the rolling and stopping procedure, are applied to the railway wheel model. It is assumed that the wheel has contained a surface semi-elliptical crack on its tread surface. The importance of axle load, speed, plasticity and braking thermal load effects on growing of a surface crake situated on a thread of wheels are demonstrated in this paper
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