| 全范围疲劳裂纹扩展速率表达式的研究 |
| |
| 引用本文： | 刘文廷,胡仁伟.全范围疲劳裂纹扩展速率表达式的研究[J].航空学报,1995,16(2):95-98. |
| |
| 作者姓名： | 刘文廷 胡仁伟 |
| |
| 作者单位： | 北京航空航天大学固体所, 北京, 100083 |
| |
| 摘 要： | 以Ｐａｒｉｓ公式和Ｗａｌｋｅｒ公式为基础，提出两种适用于全范围的疲劳裂纹扩展速率表达式，它们考虑了应力比和门槛值对疲劳裂纹扩展规律的影响，揭示了疲劳裂纹扩展在不同阶段的不相同的变化规律，同时又兼顾损伤当量折算要求。能较好地评估低载损伤不可忽略情况下结构的使用寿命和维修周期，有重要的工程实用意义。
|
| 关 键 词： | 疲劳 裂纺扩展 应力比 |
| 收稿时间： | 1994-04-28 |
| 修稿时间： | 1994-07-20 |
A STDUY ON EXPRESSIONS OF FATIGUE CRACK PROPAGATION IN ALL AREA |
| |
| Liu Wenting,Hu Renwei.A STDUY ON EXPRESSIONS OF FATIGUE CRACK PROPAGATION IN ALL AREA[J].Acta Aeronautica et Astronautica Sinica,1995,16(2):95-98. |
| |
| Authors: | Liu Wenting Hu Renwei |
| |
| Institution: | Solid Mechanic Institute of Beijing University of Aeronautics and Astronautics,Beijing,100083 |
| |
| Abstract: | Based on Paris and Walker's forulas two expressions are presented of fatiguc crack propagation in all area, which both consider the effects of stress-ratio and thrcshold value,and give different rules of fatigue crack propagation in different stages.Besides incorporating demands of damage equivalence,they are able to estimate service life and maintenance cycle of the structure affected by low load,of which the damage is not to be ignored.So they are very worthwhile in cnginccring. |
| |
| Keywords: | fatigue crack propagation stressratio |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《航空学报》浏览原始摘要信息 |
| 点击此处可从《航空学报》下载免费的PDF全文 |
|
