# Simple laminate stiffness
# Scope: Unidirectional longitudinal iso-strain rule of mixtures only; not laminate ABD theory.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

fiberFraction = 0.6
fiberModulus = 230 GPa
matrixModulus = 3 GPa

longitudinalModulus := fiberFraction*fiberModulus+(1-fiberFraction)*matrixModulus [GPa]

check fiber fraction physical: fiberFraction >= 0
check fiber fraction upper bound: fiberFraction <= 1

scenario alternative: fiberFraction = 0.48