3D	Three-dimensional
A	Section area of inertia of cell wall
b	Wall Heights
Es	Young’s modulus of raw materials used to make honeycomb structures
Ex	Equivalent elastic modulus in the x-direction
Ex/Es	Nondimensional elastic modulus in the x-direction
Ey	Equivalent elastic modulus in the y-direction
Ey/Es	Nondimensional elastic modulus in the y-direction
Ez	Equivalent elastic modulus in the z-direction
Ez/Es	Nondimensional elastic modulus in the z-direction
Gxy	Shear modulus of x-o-y plane
H	Wall length in the x-o-y plane
I	Section moment of inertia of cell wall
L	Wall length in the x-o-y plane
LA −B	Length between points A and B
Lxi	Original lengths between the marker points in the x-direction
L’xi	Lengths between the marker points in the x-direction
Lyi	Original lengths between the marker points in the y-direction
L’yi	Lengths between the marker points in the y-direction
M 1	Bending moment at endpoint 1
M 2	Bending moment at endpoint 1
N	Force of cell wall along the x-direction
N 1	Force parallel to cell wall at endpoint 1
N 2	Force perpendicular to cell wall at endpoint 1
NA −B	Number of pixels between points A and B
NPR	Negative Poisson’s ratios
PLC	Programmable Logic Controller
PPR	Positive Poisson’s ratios
SLS	Selective Laser Sintering technology
t	Wall thickness
ZPR	Zero Poisson’s Ratio
α	Nondimensional length, α = H/L
β	Nondimensional length, α = t/L
γ	Nondimensional length, α = b/L
γxy	Shear strain in the x-o-y plane
δx	Deflection under σx
Δx	Displacements in the x-direction at wall endpoints
Δy	Displacements in the y-direction at wall endpoints
εx	Normal strain in the x-direction
εy	Normal strain in the y-direction
η	Wall slope angle in the x-o-z plane
θ	Wall slope angle in the x-o-y plane
κ	Shear stress shape coefficient of the rectangular section
νxy	Poisson’s ratio in the x-o-y plane
σx	Stress in the x direction
τ	Pure shear stress
φ	Wall slope angle in the x-o-y plane
ω	Wall slope angle in the x-o-z plane