Prediction of the stress level and stress concentration in cellular beams with circular openings

Abstract

In the work on base of calculations by FEM of cellular I-beams with circular openings the approximate relation for evaluation of stress level in vicinity of open-ings under transverse bending was obtained. Calculation of simply supported cellular I-beams under action of one concentrated force applied in mid-span and two symmetri-cally applied forces was performed. Proposed relation for equivalent stresses on Mises near openings was applied for beams with different thickness of web and different rela-tive width of web-posts. Relative height of openings in all cases was equal to 0.667. It was also calculated stress con-centration factor for case of pure bending.