Experimental Study and Life Prediction of Bolt Loosening Life under Variable Amplitude Vibration

Table 4

Loosening D-N curve constant solution.

Item	Low cycle 90%	Low cycle 80%	Low cycle 70%	High cycle 90%	High cycle 80%	High cycle 70%
m	20.732	15.526	11.010	2.386	2.028	2.028
C	12.000	63.000	193.000	963.829	1674.943	1825.324