Steel structural members such as pylon members are galvanized in a bath of molten zinc after manufacturing by welding in order to increase the corrosion resistance and reduce the maintenance costs. During galvanization, there occur thermal stresses in the pylon member due to nonuniform temperature distribution, which cause elastoplastic deformation with damage. Tensile strain concentration near the hole for bolts may cause cracking on the hole surface. One of the causes of cracking is the embrittlement of steel surfaces due to contact with molten zinc. In the present study, a computational mechanics approach has been conducted for the purpose of solving numerically the physical mechanism of occurence of high tensile strains and damage due to thermal stresses, considering only the mechanical aspects of the phenomenon.
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