Honeycomb Plate Properties
Define the following terms as
t = total face sheet thickness (both sheets together)
d = total core depth
E = Young's modulus of face sheets
nu = Poissons ratio (Greek letter)
g = material density of face sheet material
gc = material density of core
I' = bending mom. of inertia/width of plate
K = membrane stiffness of plate (composite)
D = bending stiffness of plate (composite)
w = weight per unit area of plate (composite)
From classical plate theory, considering only the face sheets to carry in-plane stresses:
membrane stiffness of plate (Eq. 1)
bending stiffness of plate (Eq. 2)
(NOTE: Shear flexibility of the plate is not included.)
Where I' is the bending moment of inertia of the honeycomb plate per unit width:
(Eq. 3)
The weight per unit area of the plate is
Thus, the stiffness to weight ratios (membrane and bending) are
Define nondimensional stiffness/weight ratios
membrane
bending
Instructions for creating a NASTRAN PSHELL card for honeycomb panels.
