Stress concentration in castellated I-beams under transverse bending
Keywords:stress concentration factor, castellated I-beams, hexagonal openings, von Mises stress, FEM, experiment.
In the work on base of calculations by FEM of castellated I-beams the approximate relations for evaluation of stress level and stress concentration factor in vicinity of hexagonal fillet openings under transverse bending are derived. Calculation of simply supported castellated I-beams under action of one concentrated force applied in mid-span and two symmetrically applied forces was performed. Proposed relation for equivalent stress near openings differentiate role of each force factor V and М and allow determine level of stresses in castellated beams in wide diapason of the opening parameters under different length ratio with engineering accuracy. Obtained results were verified with experiment test on steel castellated beam with 4 m length.