Differenze

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

--- wikifemfuchde2019:lez_2019-03-18 [2019/03/19 08:45] – 163097
+++ wikifemfuchde2019:lez_2019-03-18 [2019/03/26 07:29] (versione attuale) – 163097
@@ Linea 1: / Linea 1: @@
+===== 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
+{{ :wikifemfuchde2019:profile_in_torsion_a2019_v000.mfd | profile geometry alone}}
+{{ :wikifemfuchde2019:marc_element_classes.pdf |}}
+{{ :wikifemfuchde2019:profile_in_torsion_a2019_v001.mfd |}}
+{{ :wikifemfuchde2019:profile_in_torsion_a2019_v002.mfd |}}
+{{ :wikifemfuchde2019:profile_in_torsion_a2019_v003.mfd |}}
+----
+{{ :wikifemfuchde2019:profile_in_torsion_a2019_v00x.zip |nolimetangere}}