Differenze

Queste sono le differenze tra la revisione selezionata e la versione attuale della pagina.

--- wikifemfuchde2018:lez_2018-03-28 [2018/05/02 05:45] – [Thin walled profile in torsion] ebertocchi
+++ wikifemfuchde2018:lez_2018-03-28 [2018/05/02 06:15] (versione attuale) – [Thin walled profile in torsion] ebertocchi
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+===== Ladder frame chassis - conclusions =====
+{{ :wikifemfuchde2018:quarter_ladder_frame_v003.wxmx | foglio maxima "ladder frame" a fine lezione del 7 marzo}}
+{{ :wikifemfuchde2018:channel_section_v006.wxmx |foglio maxima "Channel section" a fine lezione precedente}}
+{{ :wikifemfuchde2018:channel_section_results.wxmx | estratto
+risultati foglio maxima "Channel section" lezione precedente}}
+{{ :wikifemfuchde2018:quarter_ladder_frame_v004.wxmx | foglio maxima a fine lezione, limiti vari}}
+{{ :wikifemfuchde2018:quarter_ladder_frame_v005.wxmx | foglio maxima a fine lezione, grafico dipendenza ts da spessore}}
+command line for running Mentat
+  mentat2013.1 -ogl -glflush
+----
+===== Thin walled profile in torsion =====
+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.
+{{:wikifemfuchde2018:analisi_sezione_a_torsione.png?nolink|}}
+{{:wikifemfuchde2018:analisi_sezione_a_torsione.pdf |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
+{{ :wikifemfuchde2018:profile_in_torsion_v000.mud |}}
+{{ :wikifemfuchde2018:profile_in_torsion_v002.mud |}}
+model, as at the end of the April, 17 lesson
+{{ :wikifemfuchde2018:profile_in_torsion_x16_v004.mud |}}
+model, as at the beginning of the May, 2 lesson
+{{ :wikifemfuchde2018:profile_in_torsion_l01_r01_open_v004.mud |}}
+{{ :wikifemfuchde2018:profile_in_torsion_l01_r02_open_v004.mud |}}
+{{ :wikifemfuchde2018:profile_in_torsion_l01_r04_open_v004.mud |}}
+spreadsheet for the analysis of the results
+{{ :wikifemfuchde2018:foglio_di_calcolo_rigidezza_torsionale_trave_ffcd2018_v002.ods |}}
+----
+[[https://box.ing.unimo.it/owncloud/index.php/s/DDAaFPbfykHdaYG|Area stoccaggio file lezione corrente]]