Tehnički vjesnik, Vol. 19 No. 3, 2012.
Prethodno priopćenje
Linear and nonlinear buckling and post buckling analysis of a bar with the influence of imperfections
Stipica Novoselac
; AVL-AST d.o.o., Avenija Dubrovnik 10, 10000 Zagreb, Croatia
Todor Ergić
; Josip Juraj Strossmayer University of Osijek, Faculty of Mechanical Engineering in Slavonski Brod, Trg Ivane Brlić-Mažuranić 2, 35000 Slavonski Brod, Croatia
Pavo Baličević
; Josip Juraj Strossmayer University of Osijek, Faculty of Agriculture, Trg Kralja Petra Svačića 1d, 31000 Osijek, Croatia
Sažetak
This paper presents a linear and nonlinear buckling and post buckling numerical analysis of a bar with the influence of imperfections. In the first step, we used an approach of analytic and numerical linear buckling analysis of a bar with linear-elastic material. After linear buckling analysis of the bar, we performed nonlinear buckling analysis with the Riks method. Since the nonlinear analysis was performed in the case of ideal loading, to get correct and more realistic information of post buckling response, imperfections and plastification of material must be considered. In this case, the imperfections are eccentrical loads. This paper finally shows that the post buckling behaviour becomes unstable even for a very small value of eccentrical load in nonlinear analysis with elasto-plastic behaviour of material. Numerical analysis was performed in software Abaqus 6.10.
Ključne riječi
influences of imperfections; linear buckling; nonlinear buckling; numerical analysis; post buckling
Hrčak ID:
86748
URI
Datum izdavanja:
19.9.2012.
Posjeta: 33.670 *