摘要
提出了协同标度因子的概念，研究并指出了目前国际上广泛采用的两种疲劳断口分维测量方法（ＳＩＡ和ＦＰＭ）存在的一些实质性问题，认为正确表征断口特性的物理量应是断口的面分维和断口的分形阶数，而不是目前广泛采用的线分维．
The concept of concord scaling factor is suggested,two types of famouse fractal dimension measure methods(SIA and FPM), which are widely used in the world,on fracture surfaces are analyzed,and some principal disadvantages related to the above methods are pointed out. From the view point of energy dissipation,the physical mechanism of generating multifractal fracture surface is explained,and some important conclusions are drawn for the first time that ① the regeneration order as well as fractal dimension are the principal factors of dominating the fracture properties of materials. ②the correct measured object on the notch is its surface fractal dimension rather than its line fractal dimension.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1995年第2期28-32,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金
博士后基金
关键词
疲劳断裂
断口检查
分维测量
协同标度因子
fatigue fracture
fracture surface examination
dimensions
scaling property
fractal order
concord scaling factor
