Lightweight Photovoltaic Composite Structure on Stratospheric Airships

Table 1

The results of the three-point bending test for solar cells.

The types of the solar cell	The maximum equivalent bending stress (MPa)	Maximum strain (%)	Deflection (mm)	The equivalent elastic modulus (GPa)
EVA encapsulation	27.45	0.79	6.1	3.48
Different directions of the honeycomb core	1.35	1.33	6.52	0.101
The same direction of the honeycomb core	1.22	1.46	8.42	0.084