Dynamic Resonance of Curved Panels in Adverse Hygrothermal Environment

Table 4

Elastic moduli of glass fiber/epoxy lamina at different moisture concentrations.

Elastic moduli	Moisture concentration in %
	0.0	0.25	0.5	0.75	1.0
𝐸1	7.9	7.6	7.5	7.3	7.2
𝐸2	7.4	7.4	7.3	7.1	7.0
𝐺12	2.9	2.9	2.8	2.7	2.6
𝜈12	0.4	0.4	0.4	0.39	0.39

𝛼₁=−0.3×10⁻⁶/°K; 𝛼₂=28.1×10⁻⁶/°K; 𝛽₁=0; 𝛽₂=0.44.