西南石油大学学报(自然科学版) ›› 1994, Vol. 16 ›› Issue (1): 60-67.DOI: 10.3863/j.issn.1000-2634.1994.01.010

• 石油机械工程 • 上一篇    下一篇

dA/dN计算时最佳A-N关系曲线形式

张效羽 宋瑜   

  1. 机械工程系
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1994-02-20 发布日期:1994-02-20

Optimun Relation Curve of A and N in dA/dN Calculation

Zhang Xiaoyu Song Yu   

  1. Department of Mechanical Engineering
  • Received:1900-01-01 Revised:1900-01-01 Online:1994-02-20 Published:1994-02-20

摘要: 应用性能优异的正交多项式曲线拟合法,对计算中可能出现的A-N关系曲线形式进行了逐方次的拟合比较,确定出了最佳的A-N关系曲线形式。

关键词: 疲劳裂纹, 疲劳寿命估算, 曲线拟合

Abstract: Using orthogonal polynomial regression method analyze the possible relation cuves of A and N,and compare the results with different regression powers in dA/dN calculation,this paper determines the optimun relation curve of A and N.

Key words: Fatigue crack, Estimation of fatigue life, Curve fitting

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