A Method for Determining Fatigue Limit Based on the Analysis of Propagation Condition of Short Fatigue Crack

LU Wen-ge; Luo Shao-ming

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A Method for Determining Fatigue Limit Based on the Analysis of Propagation Condition of Short Fatigue Crack

更新时间：2026-05-27

- A Method for Determining Fatigue Limit Based on the Analysis of Propagation Condition of Short Fatigue Crack
- Vol. 22, Issue 4, Pages: 31-34(2005)
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- Online First：07 October 2005，
  
  Published：2005
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吕文阁, 骆少明. 基于疲劳短裂纹扩展条件的疲劳极限估算方法[J]. 广东工业大学学报, 2005, 22(4): 31-34.

LU Wen-ge, Luo Shao-ming. A Method for Determining Fatigue Limit Based on the Analysis of Propagation Condition of Short Fatigue Crack[J]. 2005, 22(4): 31-34.
吕文阁, 骆少明. 基于疲劳短裂纹扩展条件的疲劳极限估算方法[J]. 广东工业大学学报, 2005, 22(4): 31-34. DOI：

LU Wen-ge, Luo Shao-ming. A Method for Determining Fatigue Limit Based on the Analysis of Propagation Condition of Short Fatigue Crack[J]. 2005, 22(4): 31-34. DOI：

摘要

晶界是微观结构疲劳短裂纹扩展的主要障碍

疲劳极限实质上是疲劳裂纹能够产生

但不能突破晶界阻碍而继续扩展的最低应力.本文通过对微观结构疲劳短裂纹扩展条件的分析

考虑了晶粒取向对裂纹扩展有效驱动力的影响及晶界对裂纹的临界阻力

提出了—种基于非扩展裂纹行为的材料疲劳极限确定力法.与其他估算方法比较表明

该方法是合理和可行的.

Abstract

Grain boundary is the main block of propagation of microstructural short fatigue crack

and fatigue limit in nature is the minimum stress at which fatigue ctack may initiate but cannot propagate through the grain boundary.In this paper

a new method for the determination of fatigue limit of material using the non-propagation behaviors of crack is presented based on the analysis of propagation condition of microstructural short fatigue crack

which consider the effect of grain orientation on efficient driver of crack propagationand the critical barrier of grain boundary.It is shown that the method presented in this paper is practical and reasonable by comparing with others.

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references

吴志学,吕文阁,徐灏. 疲劳极限下损伤及“锻炼”效应[J]. 东北大学学报. 1996(03)

吴志学,徐灏. 光滑试样疲劳短裂纹的形成与扩展[J]. 东北大学学报. 1994(06)

徐灏,吴志学. 45钢疲劳短裂纹的形成和扩展[J]. 金属学报. 1995(02)

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