...合金；裂纹尖端塑性区；裂纹闭合；疲劳裂纹扩展速率[gap=840]Key words: TC4ELI alloy; crack tip plastic zone; crack closure; fatigue crack growth rate...
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裂纹闭合 crack closure ; crack-closure ; crack closing 纵裂纹 longitudinal crack ; rod crack ; vertical crack ; longitudinal surface crack ..
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The threshold of fatigue crack growth is commonly determined in terms of test results. However,the value of threshold is very difficult to extract owing to the effect of crack closure mechanism.
试验确定门槛值是最常用和最基本的方法,裂纹闭合使其准确性受到质疑。
参考来源 - 基于试验数据的疲劳裂纹扩展门槛值研究·2,447,543篇论文数据，部分数据来源于NoteExpress
疲劳裂纹在残余压应力场中的扩展可借助于裂纹闭合力来描述。
Fatigue crack propagation in a compressive residual stress field can be characterized with the closure effect.
试验和分析结果表明，短裂纹扩展的偏折强烈，裂纹闭合效应较小。
The results turn out to be that the short cracks exhibit severe crack deflection and week crack closure effect.
在焊接试件中有显著的裂纹闭合现象，其原因是焊接残余应力的作用。
There is significant closure in welded specimen due to the effect of welding residual stress.
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