The capstone keeps strain, elastic stress, and pressure force typed. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Reuse strain in the elastic stress check

The audit reuses strain 1/2 and modulus 12 Pa to source stress 6 Pa.

1212=612\cdot\frac{1}{2}=6
Solid-response source refsThe elastic stress source ref reuses the shear strain.1strainelastic stresspressure forceviscous stressflowtimeaccepted

Pressure force is a separate checked source

The pressure-force source is 18 N from 6 Pa over 3 square metres.

63=186\cdot3=18
Stress and force chainStress and pressure force remain typed source refs.1strainelastic stresspressure forceviscous stressflowtimeaccepted