摘要
从能量释放率理论出发，探讨了切削过程中钻头的受力分析和变形情况，给出了钻头裂纹扩展的推广Ｉｒｗｉｎ－Ｋｉｅｓ关系式。并由信号的时频特性，推出了钻头裂纹扩展或断裂声发射信号的数学模型。
On the basis of the theory of energy release ratio, the distribution of force and deformation of a drill during the cutting process are discussed, and the extended Irwin Kies formula for the description of relationship between the crack extension energy and the external load and its ratio of change and the compliance ratio with drill crack are presented.According to the time frequency characteristics of the signal, the mathe matical model for the acoustic emission of the drill crack is derived.This paper can provide a theoretical basis for an in depth study in the monitoring of a drill by means of the acoustic emission technology.
出处
《北京理工大学学报》
EI
CAS
CSCD
1997年第1期55-60,共6页
Transactions of Beijing Institute of Technology
基金
"八五"国防重点预研基金
