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--- wikifemfuchde2020:buckling [2020/06/04 10:20] – [Euler column buckling] ebertocchi
+++ wikifemfuchde2020:buckling [2021/06/07 15:09] (versione attuale) – [Flexural-torsional buckling example] ebertocchi
@@ Linea 1: / Linea 1: @@
+====== Buckling in FE simulations ======
+[[https://en.wikipedia.org/wiki/Euler%27s_critical_load|Buckling what?]]
+===== Euler column buckling =====
+base model: {{ :wikifemfuchde2019:400mm_supported_bar.mfd |}}
+{{ :wikifemfuchde2020:400mm_supported_bar_worked.mfd |}}
+{{ :wikifemfuchde2020:perturbed400mm_supported_bar.mfd |}}
+{{ :wikifemfuchde2020:perturbed400mm_supported_bar_worked.mfd |}}
+buckling load theoretical evaluation: {{ :wikifemfuchde2019:400mm_supported_bar.wxmx |}}
+steps:
+  * nonlinear loadcase, unperturbed ([[https://en.wikipedia.org/wiki/Newton%27s_method|N-R method]])
+  * preloaded structure natural modes
+  * nonlinear loadcase, perturbed
+  * linearized pre-buckling analysis
+===== Flexural-torsional buckling example =====
+{{ :wikifemfuchde2019:simplisupportedprofile_v000.mud |}}
+{{ :wikifemfuchde2020:simplisupportedprofile_v001.mud |}}
+profile made in s235jr steel
+thickness:
+{{tablelayout?rowsHeaderSource=Auto}}
+^                            ^ 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).
+kN 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.
+===== Post-buckling analysis of a complex structure =====
+{{ :wikipaom2018:piramide_buckling_base.mfd |}}
+{{ :wikipaom2018:piramide_buckling_neotiranti.mfd |}}
+{{ :wikipaom2018:piramide_buckling_neopannelli.mfd |}}