摘要
为恰当描述介质的损伤状态,本文针对金属材料在交变载荷作用下其刚度不断下降的事实,建立了对于该现象的数学表达式,并据此,以及连续介质力学的客观性原理,讨论了使得金属材料的单变量疲劳损伤模型成立的充分必要条件,从而为该模型的有效性提供了理论基础与可行性判据。
Through a newly formed mathematical description of the stiffness reduction of metals subjected to cyclic loads, and the principle of material frame-indifference of continuum mechanics , this paper evaluates the sufficient and necessary condition of the single-variabled damage model for metals. Therefore, the rational basis and the availablity criterion of this model ,Which is usually applied by assumptions, are formulated.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1993年第2期68-74,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
疲劳
刚度
损伤
损伤力学
fatigue, stiff ness, damage , damage mechanics.
