密布多孔构件的低周疲劳寿命予测和试验研究  

THE LOW-CYCLE-FATIGUE LIFE PREDICTION OF A MEMBER WITH HOLES

作　　者：饶寿期[1] 毛英勇 

机构地区：[1]北京航空航天大学405教研室,100083 [2]北京航空航天大学

出　　处：《航空动力学报》1992年第2期147-149,共3页Journal of Aerospace Power

摘　　要：The stress and strain field and the low cycle fatigue life of a structure member with holes are calculated theoretically and investigated experimentally.The calculated results show that it is reliable to calculate the stress and strain field of a member with holes by using the shell structural elasto plastic finite element program,which has been designed and developed by the author.The satisfactory results are obtained from LCF life prediction of a member with holes by the advanced local stress and strain method.The calculation and tests show that the stress concentration of the tensile plane member is intensified and the fatigue life reduces drastically when its holes are densified in the direction perpendicular to that of tensile;the stress concentration is mitigated slightly but the fatigue life is also shortened when they are densified in the tensile direction.The stress and strain field and the low cycle fatigue life of a structure member with holes are calculated theoretically and investigated experimentally.The calculated results show that it is reliable to calculate the stress and strain field of a member with holes by using the shell structural elasto plastic finite element program,which has been designed and developed by the author.The satisfactory results are obtained from LCF life prediction of a member with holes by the advanced local stress and strain method.The calculation and tests show that the stress concentration of the tensile plane member is intensified and the fatigue life reduces drastically when its holes are densified in the direction perpendicular to that of tensile;the stress concentration is mitigated slightly but the fatigue life is also shortened when they are densified in the tensile direction.

关 键 词：叶片 密布多孔构件 疲劳寿命 预测 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]