摘要
就外物损伤对钛合金材料(TC4和TC11)高低周复合疲劳寿命的影响进行了试验研究.分别采用摆锤法和空气炮法模拟了叶片外物损伤,对比分析了两类损伤缺口的特征.进行了无损伤试样、损伤试样的疲劳试验,对比分析了外物损伤对钛合金疲劳寿命的影响.结果表明:摆锤冲击试验法模拟的损伤缺乏代表性,空气炮发射弹丸法模拟的损伤更接近真实情况;外物损伤导致钛合金高低周复合疲劳寿命严重下降,空气炮发射弹丸法模拟的损伤使钛合金的疲劳寿命从105下降到104量级.
The effects of high cycle fatigue-low fatigue life （HCF-LCF） on titanium alloy （TC4 and TC11） were researched experimentally with foreign object damage （FOD） simulation through pendulum method and air-gas gun method and the features of these two different damage notches were analyzed and compared. Fatigue tests on nondestructive and de- structive specimens were further conducted to analyze and compare the effects of FOD on the titanium alloy fatigue life. The conclusions show that： pendulum impact test method simulation lacks of representativeness, while air-gas gun projectile method simulation is much closer to the truth; FOD leads to severe decline of HCF-LCF life of titanium alloy, and air- gas gun projectile method simulation decreases the titanium alloy fatigue life from 105 to 104 order of magnitude.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2014年第1期74-80,共7页
Journal of Aerospace Power
关键词
合金材料
高低周复合疲劳
外物损伤
裂纹萌生
试验
alloy material
high cycle fatigue-low cycle fatigue （HCF-LCF）foreign object damage （FOD）
crack initiation
experiment
