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sci.laminate-ABD-stiffness Calculator
Calculates the ABD stiffness matrix for a composite laminate from ply stiffnesses and orientations: A (in-plane), B (coupling), D (bending). Symmetric laminates have B = 0 (no bend-stretch coupling) — quasi-isotropic laminates [0/±45/90]_S give in-plane isotropy.
Inputs
E1 Gpa
Reference formula or conversion factor shown for context.
E2 Gpa
Reference formula or conversion factor shown for context.
Nu12
Reference formula or conversion factor shown for context.
G12 Gpa
Reference formula or conversion factor shown for context.
T Mm
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
N Plies
Count of items or occurrences.
Results
laminate thickness H (mm)
The value at the specified point or condition.
A₁₁ extensional stiffness (MN/m)
The tensile force or stress — the pulling force that stretches the material. Must stay below the material's tensile strength.
A₂₂ extensional stiffness (MN/m)
The tensile force or stress — the pulling force that stretches the material. Must stay below the material's tensile strength.
D₁₁ bending stiffness (N·m)
Sample size or count used in the calculation.
CLT: A_ij = Σ Q_ij · t_k
Reference formula or conversion factor shown for context.