| 断口定量分析在评估构件疲劳寿命中的应用 |
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| 引用本文： | 张燚,章文峰,闫海.断口定量分析在评估构件疲劳寿命中的应用[J].材料工程,2000(4):45-48. |
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| 作者姓名： | 张燚 章文峰 闫海 |
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| 作者单位： | 北京航空材料研究院,北京,100095 |
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| 摘 要： | 通过断口疲劳条带反推寿命的理论基础，采用断口定量分析方法，在断口上测量裂纹长度α与裂纹扩展速率ｄａ／ｄＮ，运用Ｐａｒｉｓ公式推导出裂纹扩展速率曲线方程，计算出疲劳裂纹扩展寿命。此方法已应用于涡轮盘疲劳断口和３０ＣｒＮｉＭｏＡ试验断口。
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| 关 键 词： | 断口定量分析 疲劳断裂 金属结构件 疲劳寿命 |
Quantitative Analysis in Evaluating Fatigue Lives of Components |
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| ZHANG Yi,ZHANG Wen-feng,YAN Hai.Quantitative Analysis in Evaluating Fatigue Lives of Components[J].Journal of Materials Engineering,2000(4):45-48. |
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| Authors: | ZHANG Yi ZHANG Wen-feng YAN Hai |
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| Abstract: | WT5BZ]Basic theory of evaluating fatigue lives by fatigue striations had been clarified With the quantitative analysis, the crack length a and the crack propagation rate da/dN were measured and their relationship was established Paris formula was applied to deduce da/dN curve in crack propagation stage, then the propagation lives could be obtained The process was conducted in evaluating fatigue lives of a turbine disk and 30CrNi4MoA steel specimens as examples |
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| Keywords: | quantitative analysis by fractography crack propagation rate propagation liveslied to deduce da/dN curve in crack propagation stage then the propagation lives could be obtained The process was conducted in evaluating fatigue lives of a tur |
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