On the divergence and flutter instabilities of some constrained two-degree-of-freedom systems
Sur les instabilités par divergence et par flottement de systèmes contraints à deux degrés de liberté
Nicot, F. ; Lerbet, J. ; Darve, F.
Type de document
Article de revue scientifique à comité de lecture
Affiliation de l'auteur
IRSTEA GRENOBLE UR ETGR FRA ; UNIVERSITE D'EVRY VAL D'ESSONNE IBISC FRA ; GRENOBLE INP UNIVERSITE DE GRENOBLE I CNRS UMR 5521 L3SR LABORATOIRE SOLS SOLIDES STRUCTURES RISQUES SAINT MARTIN D'HERES FRA
Résumé / Abstract
It is now well ascertained that a variety of instability modes can appear before the conventional plastic limit condition is met. In this note, both flutter and divergence instability modes are investigated. First, the criterion for detecting their occurrence is established, and the case of kinematically constrained discrete systems is investigated. Based on an illustration example, the competition between the occurrences of each of these instability modes is then analyzed, showing that the prevalence of a given mode is strongly related to both the loading conditions and the stiffness properties of the material system in hand.
Journal of Engineering Mechanics-ASCE, vol. 140, num. 1, p. 47 - 52