PSI - Issue 70

Aamir Anwar Nezami et al. / Procedia Structural Integrity 70 (2025) 105–112

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(e) (f) Fig. 1: (1 , 1 ) Displacements, (1 ) Transverse shear stress ( σ ) from Constitutive equations and (1 ) transverse shear stress ( σ ) as obtained from integration of equilibrium equations for symmetric cross-ply four-layer laminated plate for ℎ = 4 3.5. Problem. 2: Numerical examples on five-layer sandwich plates with the symmetric angle-ply configuration A five-layer sandwich plate with the symmetric angle-ply configuration ( 30 ∘ /−30 ∘ / /−30 ∘ /30 ∘ ) simply supported on two opposite edges while infinitely long along -directions are adopted. The thickness of skin is ℎ =0.05ℎ and the thickness of core is ℎ =0.8ℎ . The size of the plate model: length along -axis is = 1000 , thickness is ℎ = 250 . The plate is subjected to sinusoidal distributed load ( , ) = 0 ( / ) , where 0 = 1 / 2 . The material constants for the face sheets (transversely orthotropic) and core (isotropic) are given below. The superscript and are used for face-sheets and core, respectively. 1 = 110000 , 2 = 7857 , 3 = 7857 , 1 2 = 3292 , 1 3 = 3292 , 2 3 = 1292 , 1 2 =0.33 , 1 3 =0.33 , 2 3 =0.49 , = 40.3 , = 12 , =0.30 3.2.1. Results for five-layer Sandwich plates with the symmetric angle-ply stacking sequence having ( /ℎ = 4)