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

Table 6

The test results of Group B&C.

Specimen	Resonant frequency
	Initial value (Hz)	Ultimate value (Hz)	Reduction (Hz)	The time of the last decrease (min)
B1	7.4158	7.1411	0.2747	159.33
B2	8.1482	7.8735	0.2747	166.75
B3	7.8906	7.6563	0.2343	183.25
C1	7.9651	7.5989	0.3662	130.33
C2	8.0566	7.7820	0.2746	171.83
C3	8.0469	7.8125	0.2344	181.33