Free vibration and Ljapounov stability of compressed open thin-walled beams with a cross-section reduction are studied by a in-house finite differences numerical code, based on a refined direct beam model and allowing for investigating elastic stability of non-trivial equilibrium paths in a dynamic setting. The benchmark is a beam with doubly symmetric cross-section and non-zero warping rigidity, under free, semi-, and fully restrained warping at its ends. In all cases, the results of the direct model are compared to finite element and/or experimental ones. The reduction in the cross-section rigidity induces a weakening that may model a local damage; thus, the present investigation may be useful with an outlook to damage monitoring and identification.
|Titolo:||Vibration and buckling of open TWBs with local weakening|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||10.1016/j.proeng.2017.09.012|
|Appare nelle tipologie:||1.1 Articolo in rivista|