摘要
通过正火３５钢带孔圆棒试样的旋弯疲劳试验，研究了两级加载下孔边疲劳短裂纹扩展的统计特性，以及应力水平改变对疲劳短裂纹扩展的影响。通过这些研究结果说明了两级加载条件下Ｍｉｎｅｒ累积损伤∑ｎｉ／Ｎｉ围绕１绕动的物理机制。
In this paper,the statistical characteristic of short fatigue cracks growth at the side of small holes under two step loading was studied by means of rotating bending tests on round bar specimens with small holes.Moreover,the effect of stress change on the growth behaviour of a short crack was also investigated.At the moment,the reasons that the cumulative damage value ∑n iN i according to Miner′s rule under two step loading varies around 1 were explained by means of the results of the research on short cracks growth.
出处
《机械强度》
CAS
CSCD
北大核心
1997年第1期70-73,共4页
Journal of Mechanical Strength
