- E1 = 28 GPa
- E2 = 25 GPa
- G12 = 7.7 GPa
- nu12 = 0.158
- nu21 = 0.141
- nu13 = 0.430
- nu23 = 0.280
Measured with an Instron load frame in tension using three extensometers to measure the three experimental strains.
principal directions 1 and 2: in-plane
principal direction 3: through-plane
Ultrasonic velocities for the through-plane stiffnesses.
- v33 = 2.31 km/s
- v31 = 1.93 km/s
- v32 = 1.93 km/s
- density = 1.94 kg/m3
Resulting 3-D Stiffness Matrix (GPa)
| 1 | 2 | 3 | 4 | 5 | 6 | |
|---|---|---|---|---|---|---|
| 1 | 31.1 | 5.77 | 4.98 | |||
| 2 | 5.77 | 26.8 | 3.58 | |||
| 3 | 4.98 | 3.58 | 10.3 | |||
| 4 | 7.24 | |||||
| 5 | 7.24 | |||||
| 6 | 7.69 |