Stress intensity factor investigation on crack simple I-beam using finite element analysis

Sangar Raj, Saravanan (2022) Stress intensity factor investigation on crack simple I-beam using finite element analysis. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Stress intensity factor value has become a most essential value in engineering aspect and also in our daily life because of its contribution in a lot of industries. Crack is a very common phenomena and it can be observed in our daily life. In order to get a sound understanding of the crack that has occurred on a plate or a beam in any industry, the mode of fracture causing the crack and also the stress intensity factor value of the crack need to be obtained. In this thesis, a specimen has been selected and the crack on the specimen has been studied. Simple I-beam specimen made up of mild steel has been selected as the specimen in this research. Simple I-beam has been selected because it is widely used in many industries because of its application that can reduce the manufacturing and shipping costs in a significant way. Mild steel has been selected as the type of material of the simple I-beam because steel is a commonly used as ductile known for its versatility and its strength.Calculation on the selected specimen according to its own dimension has been carried out because every simple I-beam will have its very own dimension.Therefore, calculation of certain values of the specimen prior to the stress intensity factor value estimation need to be done. There are several methods of estimating the stress intensity factor value of a crack and finite element analysis is chosen because it gives a better accuracy and a better visualization of the crack that has occured. Stress intensity factor value estimation for different sizes of crack subject to bending on the simple I-beam specimen has been identified through the finite element analysis of calculation using the Finite Element software. The values obtained are then tabulated to compare and analyse. SIF values against the different sizes of crack subject to bending has been plotted and compared against the SIF value graphs obtained in the engineering books or articles.

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