Fatigue Life Analysis of Working Mechanism for Mining Backhoe Loader-bucket
In order to figure out the fatigue life of the working mechanism of mining backhoe loader-bucket,the calculation method of the random excavating resistance of bucket was analyzed and determined,and Matlab was applied to simulate the random excavating resistance.With Pro/E,the three-dimensional model of the working mechanism was established,and its finite element model was created by Workbench.The simulated excavating resistance was imported into ncode to analyze the stress and fatigue life of the bucket,jib and boom.The results show that the variable range of the working mechanism is 0.313x 10-2-0.028 m,and the stress range is 705-3.85×108 Pa.The minimum service life is located at the connecting parts between the bucket and rod,about 7.58x 106times.The research conclusion provides a basis for the parameter design and optimization of the machine.
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