Two cylindrical pressure vessels made of the same unidirectional lamina but with different fiber orientations were loaded as shown in Fig. P4.43 gave the following strain readings.

Cylinder A

Diameter: D = 100mm

Thickness: h = 5mm

Hoop wound ( i.e. fibers in the circumferential direction)

Internal pressure: Measured strains: Cylinder B p = 20 MPa &, = 8 10, &=&= 2.75 x 10 Diameter: D = 100 mm Thickness: h= 5 mm Helically wound at 0 = 45 Axial load: P = 147 kN Measured strain: =7 x 10 Assuming V2 = 0.3, determine lamina moduli E, E, and G2- Cylinder A Cylinder B Fig. P4.43 45 +D+