摘要
用三点弯曲多试样方法对导弹推进剂贮箱主要材料LD10铝合金及其焊件的断裂韧性和疲劳性能进行了实验研究,得到了材料母材、热影响区和焊缝的断裂韧性J_(IC)和疲劳裂纹扩展速率da/dN的规律。结合无损检测信息可以对导弹推进剂贮箱进行安全性评定和剩余寿命评估。
Experimental study on fracture toughness and fatigue performance of aluminum alloy LD10 ann its welds is performed by using three point bend muhi-specimens. The fracture toughness Jicand fatigue crack propagation law da/dN for the matrix material, the heat affected zone and the welds are obtained. Safety evaluating and residual life estimating of missile propellent tanks can be carried out with these data coupling with non-destructive testing information.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2007年第2期70-72,共3页
Aerospace Materials & Technology
关键词
三点弯曲
J积分
剩余寿命
断裂韧度
裂纹扩展速率
Three point bend, J-Integral, Residual life, Fracture toughness, Crack propagation rate
