calcresource

calcresource separates shape properties from beam-support and buckling tools. Its circular-tube worksheet takes outer diameter D and wall thickness t in a consistent unit system, then lists area, circumferences, centroidal and polar second moments, section moduli and radius of gyration. Digit and scientific-notation settings control presentation, and a Print action is available. The hollow-section model is distinct from a solid circle. Its accompanying elastic-bending discussion assumes linear material behavior and Euler–Bernoulli theory; section properties alone do not define a whole beam's loading and supports.