文档介绍：第 2 1 卷第 2 期机械强度 V o l. 21 N o. 2
1999 年 6 月 JOU RNAL O F M ECHAN ICAL STR EN GTH June 1999
●研究简报●
基于剪切形式的多轴疲劳寿命预测模型X
M ULTIAX IAL FATIGUE L IFE PRED ICTION MOD EL BASED SHEAR FORM
尚德广XX 姚卫星王德俊周志革

(南京航空航天大学飞行器系, 南京 210016) (东北大学机械工程学院, 沈阳 110006)
S ha ng D e gua ng Ya o W e ixing
(D ep artm ent of A ircraf t E ng ineering , N anj ing U niversity of A eronau tics and A stronau tics, N anj ing 210016, Ch ina)
W a ng D e jun Zhou Zhige
(M echanical E ng ineering Institu te,N ortheastern U niversity , S heny ang 110006, Ch ina)
摘要在多轴损伤临界面的基础上, 结合多轴疲劳损伤和裂纹萌生与扩展的特点, 提出一种剪切形式的多轴疲劳损
伤参量, 该参量不含有材料常数; 进而建立了一种新的多轴疲劳寿命预测模型。经多轴疲劳试验验证表明, 所建立的寿
命预测模型可同时适用于多轴比例与非比例循环加载。
关键词多轴疲劳临界面法剪切失效寿命预测
中图分类号 O 34612 TH 114
Abstract O n the basis of the critical p lane app roach fo r m ultiaxial fatigue dam age, a m ultiaxial fatigue dam age pa2
ram eter based on the shear fo rm is p resented bining the behavior of m ultiaxial fatigue dam age and the crack initia2
tion and p ropagation. T he p ropo sed m ultiaxial fatigue dam age param eter does no t contain the m aterial constant. o rd2
ing to the p resented m ultiaxial fatigue dam age param eter, a new m ultiaxial fatigue life p rediction model is established.
T he experimental verification show ed that the given m ultiaxial fatigue life p rediction model m igh t be used under bo th
p ropo rtional and nonp ropo