FATIGUE CHARACTERISTICS OF CERTAIN ENGINE FAN BLADE UNDER HIGH-LOW CYCLE COMBINED LOADING

In order to carry on life determination on certain engine fan blade,high and low cycle fatigue tests were conducted on several specimens. The fatigue characteristic curve（ S-N curve,P-S-N curve） was obtained by statistical analysis.The results show that the S-N curve of this blade meet the law of qu...

Full description

Saved in:
Bibliographic Details
Published inJi xie qiang du Vol. 38; pp. 374 - 379
Main Authors TANG Ling, SHANG BoLin, CHEN PengFei, GAO XingWei, YIN ZhiPeng
Format Journal Article
LanguageChinese
Published Editorial Office of Journal of Mechanical Strength 15.04.2016
Subjects
High-low cycle complex fatigue;Fan blade;Finite element analysis;Fatigue characteristic curve;Fatigue life
Online AccessGet full text

Cover

More Information
Summary:In order to carry on life determination on certain engine fan blade,high and low cycle fatigue tests were conducted on several specimens. The fatigue characteristic curve（ S-N curve,P-S-N curve） was obtained by statistical analysis.The results show that the S-N curve of this blade meet the law of quadratic function when the high cycle stress is greater than61. 51 MPa. In contrast,the high cycle fatigue is over the fatigue limit of general metal. The service life is associated with high cycle stress linearly. The disparity of service life is lower under high stress,while it is higher under low stress. In addition,the median life is about 2. 5 5 times of the safety lfe（ the survival rate is 99. 99%）.
ISSN:1001-9669
DOI:10.16579/j.issn.1001.9669.2016.02.028