航空学报 > 1997, Vol. 18 Issue (2): 220-223

飞机疲劳载荷谱试验研究

张保法, 傅祥炯, 周岳泉   

  1. 西北工业大学强度研究所, 西安, 710072
  • 收稿日期:1995-07-14 修回日期:1996-05-20 出版日期:1997-04-25 发布日期:1997-04-25

TESTING RESEARCH OF LOAD SPECTRA OF AIRCRAFT

Zhang Baofa, Fu Xiangjiong, Zhou Yuequan   

  1. Institute of Structural Strength, Northwestern Polytechnical University,Xi'an,710072
  • Received:1995-07-14 Revised:1996-05-20 Online:1997-04-25 Published:1997-04-25

摘要:

介绍了在战斗机谱载作用下的30CrMnSiNi2A和LY12CZ试件的裂纹形成寿命试验,以及在运输机谱载作用下的30CrMnSiA和LY12CZ试件的裂纹扩展寿命试验。对影响疲劳寿命的主要参数,如高载截取、低载截除、载荷顺序以及不同载荷谱型对寿命的影响进行了讨论,得出了一些有重要意义的结论。

关键词: 随机谱, 裂纹形成寿命, 裂纹扩展寿命, 高载截取, 低载截除

Abstract:

The tests of crack initiation life under the fighter spectra and crack growth life under the freighter spectra are conducted. The specimens are made from LY12CZ,30CrMnSiNi2A materials for crack initiation life and LY12CZ, 30CrMnSiA materials for crack growth life. The factors which influence life, such as truncation of high loads, omission of low amplitude cycles, load sequence, and different spectrum shapes,are discussed. Some significant conclusions are obtained.

Key words: random spectrum, crack initiation life, crack growth life, truncation of high load, omission of lowamp litude cycles

中图分类号: