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Finite element analysis of wheel and axle shaft fitting process

WANG Ting;FAN Zhixin;School of Material Science and Engineering,Dalian Jiaotong University;  
The quality of wheel and axle shaft fitting affects the safety of railway train operation directly.For serious mechanical damage of the wheel and axle inner surface caused by the improper installation,the finite element method is used to study wheel and axle shaft fitting. The finite element models of wheel and axle shaft are built in Abaqus. Through the simulation and calculation,the change and distribution rules of fitting force and the equivalent stress between wheel and axle are analyzed. It is found that the stress concentration appears in the combination of wheel seat on the axle and wheel hub bore and the outer edge of the oil injection hole. So the location of stress concentration should be detected with emphasis. With the fitting force and maximum equivalent contact stress changing constantly,the fitting force increases along with the press displacement,while the maximum equivalent contact stress firstly increases and then decreases. By comparing the equivalent stress of wheel and axle shaft with different press displacement,it is found that the stress concentration will induce the phenomenon of deformation in the unloading groove when the press displacement is over 190 mm. It is better to control the press displacement under 190 mm.
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