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Indice
Lecture Notes
lecture notes, as od 20220317 (big endian), 135% scaled version.
Il materiale didattico relativo alle lezioni della prof. Mantovani è reperibile su piattaforma Teams al link, previa autenticazione.
Virtual lab
Videos
Roba sparsa
quad4 Mindlin plate elementary modes.
monoelem_piastra_motielementari_singolidof.mfd
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
Euler column buckling
base model: 400mm_supported_bar.mfd 400mm_supported_bar_worked.mfd perturbed400mm_supported_bar.mfd perturbed400mm_supported_bar_worked.mfd
buckling load theoretical evaluation: 400mm_supported_bar.wxmx
steps:
- nonlinear loadcase, unperturbed (N-R method)
- preloaded structure natural modes
- nonlinear loadcase, perturbed
- linearized pre-buckling analysis
Flexural-torsional buckling example
simplisupportedprofile_v000.mud
simplisupportedprofile_v001.mud
profile made in s235jr steel
thickness:
| thickness | |
|---|---|
| flanges | 4 mm |
| web | 2mm |
| gusset plates at supports | 4 mm |
simply supported in the vertical (y) direction the at gusset plate - lower flange intersection nodes (support_me node set).
100kN load, uniformly distributed along the intersection line between the upper flange and the web spanning from support to supports (load_me node set).
Please note that in MSC.Marc the supplied point load value is applied to each associated node.
Evaluate the peak equivalent von Mises stress along the structure according to the linear elastic modeling.
Due to the compressive state of the profile web, a check with respect to buckling is also required.