疲劳损伤演变方程与寿命估算──连续损伤力学的应用

EVOLUTION EQUATIONS OF FATIGUE DAMAGE AND ESTIMATEOF FATIGUE LIFE---APPLICATION OF CONTINUUM DAMAGE MECHANICS

基于连续损伤力学理论阐述了有关损伤和疲劳损伤的某些基本概念，包括连续性、损伤度、损伤演变和脆性破坏过程等。关于低周和高周疲劳，分别扼要说明了若干疲劳损伤理论模型与方程。最后，依据疲劳过程中损伤演变与残余强度关系，作者建立了实用的疲劳损伤演变方程（包括四种函数形式）。

Some basic concepts about damage and fatigue damage,such as continuity,damage measure,dam-age evoluation and brittle failure process as well,have been introduced based on Continuum Damage Mechanics inthis paper. Some of theoretical mode and corresponding equation of both the low-and the high-frequency fatiguedamage have also been explained respectively in brief. Finally, the fatigue damage evolution equations,includingfour function forms,from relations between the darnage propagation and the residual strength in the fatigue pro-eess have presented by authors.