吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (6): 1646-1651.

• paper • Previous Articles     Next Articles

Load spectrum compiling and fatigue life prediction of wheel loader axle shaft

ZHANG Ying-shuang1, WANG Guo-qiang1, WANG Ji-xin1, HOU Xiao-ting1,2, ZHANG Er-ping3, HUANG Jian-bing3   

  1. 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China|2.Research &|Development Center, China FAW Group Corporation, Changchun 130011, China|3.Technology Center, Liugong Machinery Co., Ltd, Liuzhou 545007, China
  • Received:2010-10-09 Online:2011-11-01 Published:2011-11-01

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Abstract:

The load spectra of the wheel loader axle shaft were compiled by collecting the measured shaft load signals in the typical operation conditions to provide a reliable load condition for the prediction of the shaft fatigue life. Based on the compiled load spectra and the finite element analysis of the shaft, the fatigue life of the shaft was predicted using the Miner criterion. The effects of the operation conditions on the shaft fatigue life were analyzed. The results showed that the percentage of the fatigue damage is 68.6% in the operation in the cases of primary soil and semihumid soil, and it is less in other operation conditions. Considering the effect of the uncertainties on the fatigue life,the sensitivity analysis was performed on the shaft fatigue life. According to the sensitivity analysis result,the fatigue life increases by 3.7 times when the surface residual compressive stress reaches 100 MPa, and the fatigue life reduces by 80% when the load amplitude increases by 10%. The presented approach provides a reference for predicting the axle shaft fatigue life and improving its structural design.

Key words: special-use machinery engineering, axle shaft, load spectrum, fatigue life prediction, sensitivity analysis

CLC Number: 

  • TH243
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