Indice
Lecture Notes
lecture notes, as on 20220317 (big endian), 135% scaled version. Porzioni corrette:
Virtual lab
Videos
Video delle lezioni, autunno 2023.
Video delle lezioni di "Progettazione assistita di strutture meccaniche" primavera 2023.
Roba sparsa
Reference L-shaped cross section, to verify the coupled bending formulas: maxima worksheet, Oxy and G12 oriented MSC.Marc/Mentat linear models. Large rotation, animated hiE lowE models, gif animation.
Moti elementari per l'elemento piastra alla Mindlin.
Colonne matrice S secondo paragrafo matrice massa, modello marc monoelem_piastra_motielementari_singolidof.mfd
Diverso set di modi elementari di deformazione, più ragionati in termini di stato deformativo indotto. quad4 Mindlin plate elementary modes, drilling_modes_for_shear_locking.pdf.
Patch test for the plate element maxima worksheet, mentat model, reference paper from literature.
Roller bearing questionable modeling
RBE2 vs. RBE3
Dynamics related stuff
On the relevance of constraining in dynamic analyses back view side view relevance of (improper) constraints on the dynamic behaviour of a structure. Design is reliable in actual operational conditions (link). Added constraints stiffen up the structure, thus increasing natural frequencies. However, a 0 Hz rigid body mode natural frequency may rise to a finite value due to added positioning constraints; the associate natural mode may be excited in resonance by dynamic loads.
Poor man dynamic response animated view
MSC.Mentat procedure for creating poor man harmonic response animations
MSC.Mentat procedure for creating poor man natural mode animations
Structural damping references
structural_damping_values_jdstevenson.pdf
damping_cross-reference_and_material_properties.pdf
f_orban_damping_of_materials_and_members_in_structures.pdf
tom_irvine_damping_in_bolted_and_welded_joints.pdf
estratto vol. 2, sezione 8 di Soovere, J., and M. L. Drake. Aerospace Structures Technology Damping Design Guide.LOCKHEED-CALIFORNIA CO BURBANK, 1985.
Instabilità
Piede di biella 2d - contatti
Modello base: piede2d_meshed.mfd
Contatto piede-bronzina: interferenza radiale 0.03 mm (corpi discretizzati in accoppiamento nominale senza gioco né interferenza)
Contatto bronzina-spinotto: gioco radiale 0.05 mm (corpi discretizzati con tale gioco di accoppiamento).
Carico sullo spinotto: 28.8kN, da distribuirsi su area diametrale 20,9×60 mm^2.