Table 8.

The selected stiffnesses in SW models for different perforations and flute rotated by 15 degrees.

Stiffness	SW-0-F-15	SW-26-F-15	SW-44-F-15	SW-62-F-15
$A_{11}$ (MPa mm)	2127.2	2116.1	2082.1	2052.3
$A_{22}$ (MPa mm)	1751.6	1609.1	1267.7	885.12
$A_{33}$ (MPa mm)	699.26	681.92	608.30	524.18
$D_{11}$ (MPa mm3)	8313.4	8276.1	8166.4	8048.5
$D_{22}$ (MPa mm3)	5575.8	5290.9	4291.8	2877.2
$D_{33}$ (MPa mm3)	2425.2	2384.5	2216.7	1968.9
$R_{44}$ (MPa mm)	108.15	107.68	106.48	106.77
$R_{55}$ (MPa mm)	126.16	120.04	94.100	83.465