Laminated optimization of non-uniform I-shaped beams under transversely loading with clamped-free boundary conditions

نویسندگانمعصومه سلطانی,سیدرضا ابوالقاسمیان عطاآبادی,احمدرضا قاسمی,محسن شفیعی راد,زهره عباسی,امیرحسین امیری مهرا
نشریهStructures
شماره صفحات1524
شماره مجلد47
ضریب تاثیر (IF)4.01
نوع مقالهFull Paper
تاریخ انتشار2023
رتبه نشریهعلمی - پژوهشی
نوع نشریهالکترونیکی
کشور محل چاپایران
نمایه نشریهSCOPUS ,JCR

چکیده مقاله

This paper intends to predict the best lamination stacking sequences for the web and both flanges of cantilever double-tapered beam exposed to an externally uniformly distributed force to achieve the maximum lateral buckling capacity with optimized mass and material cost. Vlasov’s model along with the classical laminated plate theory is utilized for extracting the variational formulation in terms of lateral displacement and angle of rotation due to torsion. Considering a specific member, the Ritz method is employed to derive an analytical expression for the transverse buckling load as an explicit function of stiffness components. Through the technique of genetic algorithm, the optimum design of a lightweight multi-layer fibrous composite I-shaped beam with varying cross- sections that can sustain the maximum lateral buckling load is finally attained. The numerical results reveal that the endurable lateral buckling load of a selected model increases by about 56% via the proposed optimization process.

tags: Optimum stacking sequences, Lateral stability strength, Composite non-prismatic beam, I-shaped cross-section