STRESS INTENSITY FACTORS OF H-SHAPED STEEL BEAMS WITH SYMMETRICAL FLANGE CRACKS

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Akhrawat Lenwari
Kittichai Kanngam

Abstract

This paper presents the finite element analysis of stress intensity factor (SIF) values for I-shaped steel beams with symmetric flange cracks subjected to tension or bending. A comparison with the previous study showed that the current analysis results are in good agreement with the previous results. A parametric study showed that the flange-to-web area ratio affects the SIF values at both flange and web crack tips, while the depth-to-width ratio affects only the SIF value at the web crack tip. In addition, the SIF equations are proposed for I-shaped steel beams with symmetric flange cracks subjected to tension or bending.  The SIF equations were developed by analyzing the database of SIF values obtained from the finite element analysis with the genetic programming.

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