摘要
对金属材料进行反复加卸载的拉伸试验后通过多参数综合判定法确定Kaiser效应点。对金属材料Kaiser效应点进行混沌特性分析,包括关联维数以及Kolmogorov熵值。经分析发现,Kaiser点信号在一定的时间范围内具有混沌特征,并且Kaiser效应点信号的关联维数及Kolmogorov熵计算值比其前后一段时间内的计算值都低,说明Kaiser点处关联维数及Kolmogorov熵的降低意味着主损伤的发生。
After a tensile test of metallic materials b y repeated loading and unloading wasperformed, the Kaiser point was determined by a multi-parameters m e t h o d. Analysis o n the Kaiser point signals in metal m a s s b y chaotic kinetics, including the correlation d i m e n s i o n a n d the K o l m o g o r o v e n t r o p y, w a s p e r f o r m e d. T h e results s h o w that the Kaiser point signals have chaotic characteristics, a n d the correlation d i m e n s i o n and the Kolmogrov entropy values of the Kaiser point is lower than that in the first and the back of the time. T h e decline of the correlation dimension and the Kolmogorov entropy values of the Kaiser point means the occurrence of the m a i n d a m a g e .
作者
刘婷
毛汉领
黄振峰
毛汉颖
LIU Ting MAO Harding HUANG Zhenfeng MAO Hanying(College of Mechanical Engineering, Guangxi University, Nanning 530004, China College of Automobile and Transportation, Guangxi University of Science and Technology, Liuzhou 542506, China)
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第12期50-54,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(51365006
51445013)
广西制造系统与制造技术重点实验室资助项目(12-071-11S10)
