| 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" |
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| C |
Distance to extreme fiber from neutral axis |
in |
m |
| c (subscript) |
Denotes "core" material |
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| CS Area |
Cross-sectional area |
in2 |
m2 |
| CTcr |
Critical torque factor |
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| 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 |
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| 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 bam/tube cross-section |
in4 |
m4 |
| K |
Thermal conductivity |
Btu/(hr-ft-°F) |
W/(m-K) |
| k (subscript) |
Denotes "curvature" |
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| L |
Plate length in the x-direction, Beam length |
in |
m |
| m (subscript) |
Denotes "matrix" |
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| % m |
Percent moisture content |
% |
% |
| N |
Percent moisture content |
% |
% |
| NU |
Poisson's ratio |
|
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| 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 |
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| x (subscript) |
X-direction |
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| Y |
Y-direction of coordinate system |
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| y (subscript) |
Y-direction |
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| 1 (subscript) |
Lamina 1-direction (i.e. fiber direction) |
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| 11 (subscript) |
Lamina 1-direction (i.e. fiber direction) |
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| 2 (subscript) |
Lamina 2-direction (i.e. transverse to fiber direction) |
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| 22 (subscript) |
Lamina 2-direction (i.e. transverse to fiber direction) |
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| 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 |
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| 21 (subscript) |
For NU21 denotes deflection in 1-direction due to load in 2-direction |
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