channel_section_aa2019_aula_v001.wxmx
dimostratore_warping_aa2019_v004.mfd
twist, free warp
twist, nowarp
no twist, corrective boundary out-of-plane plane shear
chapter_9_torsion_of_thin-walled_tubes.pdf
Curiosità: Griffith, A.A, Taylor, G.I., Use of Soap Films in Solving Torsion Problems, 1917