Acid Aging of CFRP Composite Materials for Solar UAV Structure

Table 2

Empirical parameters of empirical models through nonlinear regression analysis.

Properties	Rajaram model
	(MPa)	(MPa)	(%)	(%)	Adj. -square
Hydrothermal aging	853.44	784.00	0.72	1.04	0.504
Acid aging	855.04	628.49	0.84	1.98	0.931
	Pritchard model
	a	b	c	d	Adj. -square
Hydrothermal aging	69.44	502.94	7.47	783.99	0.506
Acid aging	225.26	36.94	2.85	629.72	0.929