Dynamic Resonance of Curved Panels in Adverse Hygrothermal Environment

Table 3

Elastic moduli of glass fiber/epoxy lamina at different temperatures.

Elastic moduli	Temperature in (°K)
	300 K	325	350	375	400	425
𝐸1	7.9	7.6	7.1	6.7	6.5	6.3
𝐸2	7.4	6.8	6.4	6.2	5.9	5.7
𝐺12	2.9	2.6	2.3	2.1	1.8	1.6
𝜈12	0.4	0.43	0.41	0.35	0.36	0.35

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