STRESS DISTRIBUTION AND CONCENTRATION IN CASTELLATED BEAMS WITH SINUSOIDAL WALL PERFORATION

Vestnik MGSU

Misnik Aleksandr Vladislavovich¹  Pritykin Aleksej Igorevich² 

[1] Immanuel Kant Baltic Federal University, 14 A. Nevskogo str., Kaliningrad;Kaliningrad State Technical University, 1 Sovetskij prospekt, Kaliningrad;

关键词: castellated beam;    FEM;    stress concentration factor;    empirical relation;    equivalent stresses;    sinusoidal openings;   

DOI  :  10.22227/1997-0935.2017.8.876-884

来源: DOAJ

【 摘 要 】

N wide spread beams with hexagonal openings, the stress concentration level is rather high. Aiming to reduce the stress level by means of rounding corner openings brings to introduction of beams with sinusoidal perforation (BSP). However, the studies of stress level in such beams depending on perforation parameters are not known. Development of empirical relation for estimation of stress level in castellated beams with sinusoidal perforation was fulfilled on the base of analysis of the results of BSP calculation by the finite element method. Results of study have allowed to establish the empirical relation for estimation of distribution regularities of equivalent stresses on Mises in castellated beams with sinusoidal perforation useful for engineering calculations. The established relation differentiates the role of every force factor: transverse force V and constant bending moment M. Calculation of hinged beams are performed under action of one pointed load applied in the mid-span and also under simple bending. The developed relation allows to determine the level of stress build-up in perforated double-tee beams with sinusoidal openings under constant transverse force V and constant bending moment M. Application of established relation to calculation of stresses in beams with the same perforation pattern was verified when varying the height of openings. The value of rounding corner radius remained unchanged. FEM calculations have shown that under constant transverse force and lineally changing bending moment, the maximum values of equivalent stresses on Mises near the contour of openings along the beam length are also changing lineally. The obtained empirical relation, in spite of its simplicity, allows to estimate the level and stress buildup in the openings zone under constant transverse force and simple bending depending on parameters of beam perforation.

【 授权许可】

Unknown