| A
|
[A] extensional stiffness matrix for CLT
|
lb/in
|
N/m
|
| A Inverse
|
[A] inverse extensional stiffness matrix for CLT
|
in/lb
|
m/N
|
| B
|
[B] coupling stiffness matrix for CLT
|
lb
|
N
|
| B Inverse
|
[B] inverse coupling stiffness matrix for CLT
|
1/lb
|
1/N
|
| b (subscript)
|
Denotes "bending"
|
|
|
| C
|
Distance to extreme fiber from neutral axis
|
in
|
m
|
| c (subscript)
|
Denotes "core" material
|
|
|
| CS Area
|
Cross-sectional area
|
in2
|
m2
|
| CTcr
|
Critical torque factor
|
|
|
| CTE
|
Coefficient of thermal expansion
|
in/in/°F
|
m/m/°C
|
| CME
|
Coefficient of moisture expansion
|
in/in/%moisture
|
m/m/%moisture
|
| dCell
|
Honeycomb core cell diameter
|
in
|
m
|
| D
|
[D] bending stiffness matrix for CLT
|
lb-in
|
N-m
|
| D Inverse
|
[D] inverse bending stiffness matrix for CLT
|
1/(lb-in)
|
1/(N-m)
|
| DEN
|
Density
|
lb/in3
|
g/m3
|
| DENc
|
Density of the core (not the density of the material the core is made from)
|
lb/in3
|
g/m3
|
| +e, +eps
|
Tensile strain
|
in/in
|
m/m
|
| -e, -eps
|
Compression strain
|
in/in
|
m/m
|
| E
|
Young's modulus
|
lb/in2
|
Pa
|
| Ec
|
Compressive modulus of a core material
|
lb/in2
|
Pa
|
| End Area
|
End area
|
in2
|
m2
|
| f (subscript)
|
Denotes "fiber" or "face sheet" for sandwich plates
|
|
|
| G
|
Shear modulus
|
lb/in2
|
Pa
|
| gage
|
Honeycomb core cell wall thickness
|
in
|
m
|
| gam
|
Shear strain
|
in/in
|
m/m
|
| GcL
|
Core shear modulus in a sandwich plate, x-direction
|
lb/in2
|
Pa
|
| GcW
|
Core shear modulus in a sandwich plate, y-direction
|
lb/in2
|
Pa
|
| I
|
Area moment of inertia of a beam cross-section
|
in4
|
m4
|
| J
|
Polar moment of inertia of a tube/beam cross-section
|
in4
|
m4
|
| K
|
Thermal conductivity
|
Btu/(hr-ft-°F)
|
W/(m-K)
|
| K
|
Torsional stiffness constant of a tube/beam cross-section
|
in4
|
m4
|
| k (subscript)
|
Denotes "curvature"
|
|
|
| L
|
Plate length in the x-direction, Beam length
|
in
|
m
|
| m (subscript)
|
Denotes "matrix"
|
|
|
| % m
|
Percent moisture content
|
%
|
%
|
| N
|
Percent moisture content
|
%
|
%
|
| NU
|
Poisson's ratio
|
|
|
| P
|
Concentrated point load
|
lb
|
N
|
| p
|
Uniform distributed load
|
lb/in2
|
Pa
|
| +S
|
Tensile strength
|
lb/in2
|
Pa
|
| -S
|
Compressive strength
|
lb/in2
|
Pa
|
| T
|
Thickness of face sheets or core material
|
in
|
m
|
| W
|
Plate width in the Y-direction
|
in
|
m
|
| W
|
Point load on a beam
|
lb
|
N
|
| w
|
Distributed load on a beam
|
lb/in
|
N/m
|
| X
|
X-direction of coordinate system
|
|
|
| x (subscript)
|
X-direction
|
|
|
| Y
|
Y-direction of coordinate system
|
|
|
| y (subscript)
|
Y-direction
|
|
|
| 1 (subscript)
|
Lamina 1-direction (i.e. fiber direction)
|
|
|
| 11 (subscript)
|
Lamina 1-direction (i.e. fiber direction)
|
|
|
| 2 (subscript)
|
Lamina 2-direction (i.e. transverse to fiber direction)
|
|
|
| 22 (subscript)
|
Lamina 2-direction (i.e. transverse to fiber direction)
|
|
|
| 12 (subscript)
|
Lamina 1 shear direction (i.e. in plane direction), or for NU12 denotes deflection in 2-direction due to load in 1-direction
|
|
|
| 21 (subscript)
|
For NU21 denotes deflection in 1-direction due to load in 2-direction
|
|
|