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金属学报  2005 

管线钢的疲劳裂纹扩展速率与疲劳寿命关系的研究

, PP. 523-528

Keywords: 管线钢,疲劳裂纹扩展速率,疲劳寿命

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Abstract:

本文通过对管线钢表面缺陷的断裂力学分析，建立了用管线钢的疲劳裂纹扩展数据估算含初始缺陷的管道在运行条件下的疲劳寿命的数学计算方法。用该方法计算了6种管线钢在给定运行条件下的疲劳寿命，并进行了模拟实际条件的疲劳试验，表明管线钢疲劳寿命的计算值与试验值之间存在良好的线形关系，即在疲劳裂纹扩展试验结果的基础上，计算管线钢在实际运行条件下的疲劳寿命是可行的。同时讨论了管线钢的组织对其疲劳性能的影响。

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