摘要
采用ANSYS软件进行模态分析和谐响应分析,确定钛合金(TC17)试样尺寸和试验加载频率。利用弯曲疲劳试验系统进行试样在室温20kHz条件下的超高周疲劳试验。通过分析试验数据,计算得到p-S-N曲线,发现在大于107循环时,试样不存在传统意义上的疲劳极限。运用Paris模型从理论上计算得到钛合金(TC17)试样裂纹扩展寿命,发现其不超过中值疲劳寿命的2.1%。
Titanium alloy （TC17） specimen＇ s dimension and testing frequency were studied with the method of modal analysis and harmonic analysis of ANSYS software. Then, the specimens were implemented with 20kHz bending fatigue testing system to process ul- tra-high-cycle fatigue experiment at room temperature. The p-S-N curve was calculated based on testing results, and it shows that the traditional fatigue limit of the specimen does not exist while the fatigue cycles exceed l0T. Paris model is used to calculate titanium alloy （TC17） specimen＇ s crack propagation life, which is under 2.1% of the median fatigue life.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2013年第3期92-96,共5页
Journal of Aeronautical Materials
基金
国家自然科学基金(50975284)
