Crusher pin shaft fatigue analysis based on modified Manson-Halford model

doi:10.16731/j.cnki.1671-3133.2024.08.001

Abstract

Abstract: Taking the double-stage hammer crusher as the research object,considering the load sequence effect and the load interaction effect on pin shaft fatigue damage,the Manson-Halford (M-H) nonlinear fatigue damage model was modified,and the accuracy of the modified model was verified through experimental data. The dynamic load of the pin shaft was obtained through MFBD-DEM bidirectional coupling method,which takes into account the nonlinear collision contact between the hammer head and the pin shaft and the influence of material particles on the force of the pin shaft. Finally,the modified M-H model was used for fatigue analysis of the pin shaft.The results show that compared with the existing model,the modified M-H model has the smallest relative error in the validation of examples. Based on the modified M-H model,the minimum fatigue life of the pin shaft is calculated to be 9.918×10⁶ cycles (165 h). It is reasonable and feasible to use the MFBD-DEM bidirectional coupling method for fatigue analysis of large crushing equipment such as double-stage hammer crushers.

Key words: double-stage hammer crusher, rigid-flexible coupling, MFBD-DEM bidirectional coupling, fatigue analysis

CLC Number:

TD451

WANG Xin, YAN Jun, WU Tong, YANG Wenjing. Crusher pin shaft fatigue analysis based on modified Manson-Halford model[J]. Modern Manufacturing Engineering, 2024, 527(8): 1-8.

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