foglio maxima "ladder frame" a fine lezione del 7 marzo

foglio maxima "Channel section" a fine lezione precedente

estratto risultati foglio maxima "Channel section" lezione precedente

foglio maxima a fine lezione, limiti vari

foglio maxima a fine lezione, grafico dipendenza ts da spessore

command line for running Mentat

mentat2013.1 -ogl -glflush

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Open thin-walled rectangular cross section profile (a longitudinal cut is performed at the lateral wall center line, whose kerf (width) is negligible), 120x40mm outer dimensions, 2mm wall thickness. (Dimensions at the midsurface: 118x38mm), element size ranging from ~10mm to ~20mm.

sorgente ipe

At the A cross section, a skew-symmetry material continuity constraint is applied.

The kinematic constraint at the B point (sphere in cylinder joint) is a positioning constraint, along with the $w_A=0$ axial constraint in A.

A twist per unit length equaling 0.001 radiant/mm is imposed to the profile, i.e. a $\psi_B=0.001 \cdot l$ (it was, erroneously, $\psi_B=0.0005 \cdot l$) rotation is imposed at each end, where $l$ is the $z$ axial coordinate of the endpoints, being z=0 at the skew-symmetry plane.

The reaction moment associated with the constraint will determine the applied torque $T$.

modello iniziale

profile_in_torsion_v000.mud

profile_in_torsion_v002.mud

model, as at the end of the April, 17 lesson

profile_in_torsion_x16_v004.mud

model, as at the beginning of the May, 2 lesson

profile_in_torsion_l01_r01_open_v004.mud

profile_in_torsion_l01_r02_open_v004.mud

profile_in_torsion_l01_r04_open_v004.mud

spreadsheet for the analysis of the results

foglio_di_calcolo_rigidezza_torsionale_trave_ffcd2018_v002.ods

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Area stoccaggio file lezione corrente