Greek Symbols
| α |
Coefficient of thermal expansion / Fracture angle in LaRC |
| β | Coefficient of moisture expansion / Shearing angle in draping |
| γ |
Shear strain, shear angle |
| η |
Coefficient of influence |
| Δ |
Load change |
| ε |
Normal strain |
| ϑ |
Third coordinate of the modified cylindrical coordinate system |
| κ |
Curvature |
| ν |
Poisson's ratio |
| σ |
Normal stress |
| τ |
Shear stress |
| φ |
Misalignment angle |
| ϕ |
Second coordinate of the cylindrical coordinate system |
| ξ, η, ζ |
Principal stress/strain coordinate system |
Latin Symbols
|
Curve fitting parameter for Cuntze's failure criterion |
|
Components of the 3D stiffness matrix |
|
Young's modulus |
|
Coefficients in quadratic failure criteria, stress space |
|
Interaction coefficient in the Tsai-Wu criterion |
|
Failure criterion function |
|
Shear modulus |
|
Toughness ratio |
|
Moisture / humidity |
|
Thickness |
| IRF |
Inverse Reserve Factor |
| MoS |
Margin of safety |
|
Interaction exponent for Cuntze's failure criterion |
|
Slope parameter for Puck's action plane criterion |
|
Shear failure stress in the 23-plane/Wrinkling coefficient |
|
Shear failure stress in the 13-plane/Midplane curvature radius |
|
Fracture resistance in Puck's action plane criterion |
|
Radial ordinate R+z |
| rd |
Radius difference |
| RF |
Reserve Factor |
|
Shear failure stress/strain in the 12-plane |
|
Temperature |
|
In-plane displacement in x, y-direction |
|
Failure stress/strain for isotropic material |
|
Through-the-thickness displacement |
|
Failure stress/strain in the 1-direction |
|
Global x-coordinate |
|
Failure stress/strain in the 2-direction |
|
Global y- and longitudinal coordinate of the cylindrical coordinate system |
|
Thickness coordinate |
| 1, 2, 3 |
Ply principal coordinate system |
Subscripts
|
Core |
|
Compressive |
|
Delamination |
|
Exposure |
|
Effective |
|
Face sheet |
|
Bottom face sheet |
|
Top face sheet |
|
Fiber failure mode |
|
In-situ |
|
Matrix failure mode |
|
Supporting point number |
|
Tensile |
|
Perpendicular to fiber |
|
Parallel to fiber |
|
Wrinkling |
| , |
Derivative |
Superscripts
|
Midplane strain |
|
Action plane |
|
Under compression load |
|
Sum of temperature and moisture effects |
|
Longitudinal |
|
In misalignment frame coordinate system |
|
Under tension load / Transverse |
Acronyms
| FF |
Fiber Failure |
| IFF |
Inter-fiber Failure |
| INS |
Interlaminar Normal Stress |
| ISS |
Interlaminar Shear Stress |
| LSoE |
Linear System of Equations |
| UD |
Unidirectional |