Interactive buckling of wide plates made of Functionally Graded Materials with rectangular stiffeners
Artykuł w czasopiśmie
MNiSW
140
Lista 2021
| Status: | |
| Autorzy: | Teter Andrzej, Kołakowski Zbigniew |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2022 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 171 |
| Numer artykułu: | 108750 |
| Strony: | 1 - 14 |
| Web of Science® Times Cited: | 6 |
| Scopus® Cytowania: | 7 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| A phenomenon of multimodal buckling of wide stiffened plates made of Functionally Graded Materials (FGM) subject to uniform compression in the elastic range is considered. This phenomenon occurs only when the eigenvalues corresponding to the global mode and the lowest local mode are comparable. Dimensions of wide plates with rectangular stiffeners were selected to make the eigenvalues close to one another. All simulations were conducted with the finite element method, where the behavior of a single segment of the stiffened plate was modeled. Symmetry conditions were assumed along the edges connecting the segments, whereas modified boundary conditions were assumed at both the ends to fulfill strictly the conditions of free support of the plate. A nonlinear problem was solved with the Riks algorithm to trace stable and unstable equilibrium paths. Values of the ultimate load-carrying capacity determined in ultimate points, plate modes in the ultimate state and under considerable overloading were analyzed. It was found that the cases of plates with stiffeners of the stiffness comparable to the stiffness of the skin were dangerous in particular, as the stiffener stability loss decreased significantly the ultimate load-carrying capacity of the whole structure. If the local mode of “stiffener buckling” is neglected by considering the corresponding imperfection, a considerable overestimation of the load-carrying capacity of the structure can take place, regardless of the fact if it is the lowest eigenmode. Strong over-rigidity of the stiffener causes that only the plate skin is subject to buckling and, thus, the load-carrying capacity of the whole structure improves. In the extreme situation, it leads to one-mode buckling. Thermal loads are neglected in this study. |
