Mechanical Behavior of Sandwich Panels with Hybrid PU Foam Core

Table 2

Summary of the test matrix and parameters of GHP specimens.

Specimen^1	Illustration	L (mm)	B (mm)	H (mm)	Core thickness (mm)	Core density
GHP-CON		1400	120	≈80	73	150
GHP-1-1		1400	120	≈80	23/46	150/150
GHP-2-1		1400	120	≈80	23/23/23	150/150/150
GHP-1-2		1400	120	≈80	23/46	350/150
GHP-2-2		1400	120	≈80	23/23/23	350/150/150
GHP-2-3		1400	120	≈80	23/23/23	350/250/150

¹GHP-a-b: a means the number of the horizontal GFRP layers, and b means the density number of the PU foam core.