Indice

Progettazione Assistita di Organi di Macchina, primavera 2022

Virtual CdM lab 2021+ shortcut.

Lecture Notes

lecture notes, as of 2021-09-07 (big endian).

:!: Errata corrige. :!:

Formulario reso disponibile in sede d'esame.

Planar beam structure i.p. and o.o.p. loadings

The beam structure centroidal axis lies on a plane, which is also a symmetry plane for the cross-sections.

Symmetric and skew-symmetric loads with respect to such a plane are called in-plane and out-of-plane loads, respectively.

If the superposition of effects holds (e.g., if the structure behaves linearly) each load set only induces an associated subset of the possible components of internal action, see

Symmetric and skew-symm. parts of a general load

(ipe source)

A general load is applied to a symmetric structure in a); in b), c) the loads applied on each half structure is treated separately. In d), e) the action on the loaded portion is halved, and symmetrically propagated to the other portion; those symmetric actions are accumulated in the symmetric part of the load f). In g), h) the action on the loaded portion is halved, and skew-symmetrically propagated on the unloaded portion; those skew-symmetric actions are accumulated in the skew-symmetric part of the load i).

Rollbar-like frame

Maxima worksheets: v0001, v0003, v0004, v0005, v0006, v0007, controllo, v0008, v0009, v0010 - finale.

Quarter ladder frame chassis

quarter_ladder_frame_paom2022a.wxmx

quarter_ladder_frame_paom2022b.wxmx

quarter_ladder_frame_paom2022c.wxmx

quarter_ladder_frame_paom2022d.wxmx

proprietà sezione di riferimento

quarter_ladder_frame_paom2022z.wxmx

struttura simil Halo

halo_paom2022a.wxmx

halo_paom2022b.wxmx

halo_paom2022c.wxmx

schemi statici per la determinazione dei momenti flettenti e torcenti

halo_v004.mud halo_v007.mud halo_v008.mud

Other stuff

caveat_castigliano.wxmx

Principal orientations for beam flexure. This gif animation presents the axial stress component map as a function of the bending moment vector orientation, as evidenced by the rotating needle. It clearly appears that, for a generic (vs. e.g. circular) cross section, the neutral axis may significantly deviate from the moment vector orientation; those two directions become parallel only in correspondence of the principal directions for bending (located at [18.4°-18.5°]+N·90° for the cross section under scrutiny). The bending moment rotates of 0.1° each increment.

foglio Maxima per calcolo risultanti momento e curvature in un esempio di piastra inflessa (provino a flessione a quattro punti).

modi_piastra_mindlin_v002b.pdf

Instabilità, euler_beam_buckling_2022_noplv.wxmx, 400mm_supported_bar_v2022a.mfd …b.mfd …c.mfd

Videos

primavera 2022

primavera 2021

Turni d'esame

https://cdm.ing.unimo.it/dokuwiki/restricted/turni_esame_pt_pasm_paom