针对某推土机推杆在恶劣工况下出现开裂的失效现象，用有限元分析与试验测试相结合的方法对推杆进行失效分析，并论述了改进后推杆的有效性。改进后的推杆没有出现开裂的失效问题。%In view of cracking of the push rod of a bulldozer, FEA was combined with tests to analyze the failures of the push rod, and effectiveness of the improved push rod was expounded. Practices showed the improved push rod appeared no failures again.
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