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--- wikifemfuchde2020:singularities [2020/06/04 05:02] – creata ebertocchi
+++ wikifemfuchde2020:singularities [2020/06/04 05:06] (versione attuale) – [spot welding on a thin walled profile in torsion] ebertocchi
@@ Linea 1: / Linea 1: @@
+====== Singularities ======
+===== References =====
+review papers on stress singularity identification and characterization, GB Sinclair et al.:
+  * {{:wikipaom2016:sinclair_i.pdf|}}
+  * {{:wikipaom2016:sinclair_ii.pdf|}}
+  * {{:wikipaom2016:sinclair_et_al_practical_convergence_divergenze_checks_for_stresses_from_fea.pdf|}}
+===== FEM Examples =====
+==== Singular/nonsingular behaviour transition in a cantilever beam ====
+slight perturbations of the theoretical clamped/free limit angle
+{{:wikipaom2016:test_singolarita_clamped-free_v2005r3.mud|}}
+Figure 2d, p.6 sinclair_ii pdf, κ=2; actually plane strain, $\nu=0.3$, critical angle from eq. (2.19).
+==== A questionable ball bearing modeling for axle support ====
+{{:wikipaom2015:singolarita_cuscinetti_tensioni.gif?400|}}
+{{:wikipaom2015:singolarita_cuscinetti_cedimenti.gif?400|}}
+{{:wikipaom2016:singolarita_cuscinetti_dubbia_modellazione.mud| modello marc/mentat}}
+==== spot welding on a thin walled profile in torsion ====
+steel, 80x80mm square section, 2.5 mm thickness.
+modeled portion: 40mm in the axial direction, with 1 spot weld whose nominal diameter is 4mm.
+file:
+  * {{ :wikifemfuchde2020:spotweldedprofile_singular.mfd | single node spot weld}}
+  * {{ :wikifemfuchde2020:spotweldedprofile_rbe2.mfd | rbe2 "distributed" spot weld}}
+  * {{ :wikifemfuchde2020:spotweldedprofile_results.xls |collected results}}