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本文研究了EQ1170KA客车底盘焊接接头疲劳裂纹扩展速率的规律,结果表明:焊接接头不同部位的疲劳裂纹扩展速率各不相同,焊接残余应力和金相组织对疲劳裂纹扩展速率都有一定的影响。
In this paper, the fatigue crack growth rate of welded joints of EQ1170KA bus chassis is studied. The results show that the fatigue crack growth rates are different in different parts of welded joints, and the residual stress and microstructure of welded joints affect the fatigue crack growth rate to a certain extent.