Optimization of Thin-Walled Beams Subjected to Bending in Respect of Local Stability and Strenght

• Autorzy: Gałkiewicz T. , Królak M. , Kubiak T.
• Języki publikacji: EN

Abstrakty

EN

A method for optimization (with some limitations) of thin-walled beams with a trapezoidal cross-section is presented in the paper. Beams are subjected to bending. They undergo local buckling in the elastic range. The dimensions of beam cross-section walls are optimized. Two cases was consider. In the first one the smallest weight of the beam (the smallest area cross-section) for given critical buckling moment was calculated. In the second case the maximum critical moment for given area of the cross-section was calculated. Next, the ultimate bending moment in the postcritical state is found for the optimized beams.

Słowa kluczowe

EN

thin walled beams; buckling; optimization; postbucling state; ultimate load limit

PL

belka cienkościenna; wyboczenie

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2007
• Tom: Vol. 11, nr 1
• Strony: 37--48
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Gałkiewicz T.

autor

Królak M.

autor

Kubiak T.

• Technical University of Łódź, Department of Strength of Materials and Structures Stefanowskiego 1/15, 90-924 Łódź, Poland

Bibliografia

• [1] Królak M. (Ed.), Postcritical states and the limit load-carrying capacity of thin-walled girders with flat walls, PWN, Warsaw-Łódź, 1990 (in Polish)
• [2] Kołakowski Z., Kowal-Michalska K., Selected problems of instabilities in composite structures, Technical University of Łódź, Łódź, 1999
• [3] Wolmir A. S., Stability of deformable structures, Nauka, Moscow, 1967 (in Russian)
• [4] Gałkiewicz T., Approximate stability analysis of rib walls of the box girder subjected to bending with compression or tension, Proceedings of Symposium on Stability of Structures, Łódź, 1979 (in Polish)
• [5] Magnucki K., Oswald M., Stability and optimization of three-layer structures, Institute for Sustainable Technologies, Radom, 2002 (in Polish)