# Specific stiffness and strength
# Scope: Material modulus-to-density ratio; no structural geometry comparison.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

modulus = 69 GPa
density = 2700 kg/m^3

specific := modulus/density [m^2/s^2]

check specific stiffness target: specific >= 20000000 m^2/s^2

scenario alternative: modulus = 55.2 GPa