摘要
本文研究了8090Al-Li合金穿透疲劳短裂纹的门槛值,测定了不同长度短裂纹的门槛值和裂纹闭合效应,探讨了该合金疲劳短裂纹门槛值、裂纹尾迹和裂尖屏蔽之间的关系,给出了该合金穿透疲劳短裂纹的上界值和理论最低门槛值。
Threshold of short through fatigue crack for an Al-Li 8090 alloy wasevaluated to be lower than that of long crack, and to decrease with the shorteningof the crack length. The correlation among the threshold, crack wake and crack tipshielding of the short fatigue crack was discussed. The critical length and lowesttheoretical threshold of short through fatigue crack were presented.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期A374-A377,共4页
Acta Metallurgica Sinica
关键词
AL-LI合金
疲劳
裂纹
门槛值
Al-Li alloy
short fatigue crack
threshold
crack closure effect
crack tip shielding
crack wake
