Numerical wear characteristics and mechanism of H13 for TBM disc cutters
As a key component of rock breaking in tunneling machines,the wear performance of the cutting ring sur-face is one of the main factors affecting the service life of the tunneling machine.Therefore,simulation analysis is conducted on the wear behavior of TBM cutting ring material H13.Study the wear depth and wear morphology of TBM tool ring material H13 through experiments;Establish a finite element model and calculate the wear depth based on the Archard model.Introducing ABAQUS for secondary development of the UMESHMOTION subrou-tine,combined with the ALE adaptive mesh repair mechanism,a finite element wear model for the damage of cutting ring raw materials is constructed,and the wear distribution characteristics and wear depth analysis results of H13 material are obtained.The results indicate that as the number of wear cycles increases,the wear depth of the sample gradually increases.The simulated wear depth is in good agreement with the experimental test values.When the number of wear cycles is 3 000,the wear morphology of the sample and the distribution characteristics of internal u-nit nodes are that the nodes in the high stress concentration area shift along the thickness direction(z direction).When the wear time is 1 second,the contact stress of the sample reaches its maximum value,and as the wear pro-gresses,the rate of decrease in wear depth gradually decreases.The slip distance in the wear area is consistent with the distribution characteristics of wear,and the greater the slip,the deeper the wear in the area.
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