摘要
细节疲劳额定值法(DFR法)是基于概率疲劳的民机结构疲劳可靠性寿命分析方法之一。针对我国铸造TC4钛合金疲劳性能数据不全而不能满足新型民用涡扇支线飞机研发需要的现状,采用双点法和单点法对热等静压处理的铸造TC4钛合金的细节疲劳强度截至值DFRcutoff进行了对比研究。结果表明:双点法所测DFRcutoff=375.83MPa,单点法所测DFRcutoff=387.30MPa,两者之间的相对误差小于3.1%,试验结果准确可靠,可为新型涡扇支线飞机选材、疲劳设计和寿命评估以及民用飞机适航审查提供数据支持。
The detail fatigue rating （DFR） valued method is one of the design and prediction methods for fatigue reliability life based on probability fatigue for civil aircrafts. The casting TC4 alloy could not meet the development need for new-type civil turbofan regional aircraft owing to the data deficiency of its fatigue properties. So that the DFRcutoff values of casting TC4 alloy were measured and calculated by double-dot and single dot method, respectively, in this study. The results indicate that the DFRcutoff values are 375.83 MPa by the double-dot method and 387.30 MPa by the single dot method with a relative error lower than 3.1% between them. These test results were accurate and reliable, and can be used to select suitable materials from the fatigue strength design and fatigue life evaluation of the components for new-type turbofan aircraft and the navigability inspection of the civil aircraft.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第9期1530-1532,共3页
Rare Metal Materials and Engineering
