Enhancing Fatigue Performance of Sandwich Composites with Nanophased Core

Table 3

Fatigue test data for neat and 1% CNF sandwich composites.

Material	Number of Cycles × 10^6
Neat PUF Sandwich Composite	90% 𝜏ultimate	80% 𝜏ultimate	70% 𝜏ultimate	60% 𝜏ultimate	50% 𝜏ultimate
	0.025	0.043	0.125	0.32	0.977
	0.028	0.039	0.134	0.34	1.003
	0.03	0.04	0.14	0.35	1.01
	𝐴𝑣𝑔.∶0.027±0.002	𝐴𝑣𝑔.∶0.041±0.002	𝐴𝑣𝑔.∶0.13±0.01	𝐴𝑣𝑔.∶0.37±0.02	𝐴𝑣𝑔.∶1.0±0.02
1% CNF PUF Sandwich Composite	0.029	0.092	0.217	0.453	1.095
	0.036	0.099	0.267	0.48	1.117
	0.043	0.105	0.303	0.53	1.113
	𝐴𝑣𝑒.∶0.04±0.01	𝐴𝑣𝑔.∶0.10±0.01	𝐴𝑣𝑔.∶0.26±0.04	𝐴𝑣𝑔.∶0.49±0.04	𝐴𝑣𝑔.∶1.11±0.01