Experimental Research on Vibration Fatigue of CFRP and Its Influence Factors Based on Vibration Testing

Table 5

The test results of Group A.

Specimen	Resonant frequency
	Initial value (Hz)	Ultimate value (Hz)	Reduction (Hz)	The time of the last decrease (min)
A1	7.8906	7.6563	0.2343	183.25
A2	8.1250	7.8125	0.3125	181.33
A3	7.9688	7.5000	0.4688	101.75