欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对飞机老龄化带来的结构安全问题,开展2A12-T4铝合金标准试样模拟不同停放日历年的加速环境试验和疲劳实验,计算得到细节疲劳额定强度（DFR）的变化规律,建立基于动态S-N曲线法的疲劳关键件性能退化计算模型,并与退役飞机同种材料试样疲劳寿命对比.结果表明,采用动态S-N曲线法和DFR法建立的寿命预测模型与真实值吻合较好,飞机疲劳关键件的疲劳性能会随着停放日历时间的延长而降低.
英文摘要：
To study the structure safety problem of aging aircraft, 2A12-T4 aluminium alloy specimens were used to simulate the accelerated environment test and fatigue test under different parking calendar years. The decrease rule of detail fatigue rating （DFR） was calculated, and the degeneration model for fatigue critical components was established based on dynamic S-N curve method. With the established model, the fatigue lives of specimens under different parking calendar years were compared with the fatigue life of the same specimen from retired aircraft. The result shows that the obtained predict fatigue life from life prediction model based on dynamic S-N curve and DFR method is in good agreement with the test, and the fatigue performance of aircraft cirtical components would declines with the extension of cumulative parking calnendar time.
同期刊论文项目
同项目期刊论文
期刊信息
位置：