student profile: Mr Bac Mai


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Thesis work

Thesis title: FRACTURE MODELLING IN COLD-FORMED STEEL CONNECTIONS

Supervisors: Cao Hung PHAM , Giang NGUYEN, Gregory HANCOCK

Thesis abstract:

High strength steel is frequently applied in practice not only in the mechanic field but also in construction because of its many advantages. In structural engineering, cold-formed steel (CFS) is used increasingly in place of hot-rolled steel. Two of its clear positive aspects is its lightness and higher strength that makes it easier to transport and erect. This enables both time-saving and labour-saving. However, this material also has its disadvantages. Two of the most changeling issues when using CFS are buckling and premature fracture. The first problem often relates to its high slenderness as a result of the large ratio between the width and the thickness of the components. This has been the subject of considerable academic research and practical application over a long time. The second problem involves the cold-rolling process that dramatically increases the material’s strength, but it can also lead to premature fracture of the material. It can be seen that this issue leads to risks for the whole structure. However, the problem has not received as much attention from both researchers and designers. The more we understand about the fracture of the cold-rolled material, the better we can employ it.

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