|Autors: Nikolov, N. D., Lazov, L. D.|
Title: Numerical analyses of the feeder number influence on the residual stress in a steel casting
Keywords: feeder, finite element method, residual stress, sand casting, steel
Abstract: In the present article, the residual stresses, formed during the cooling of a steel sand casting, are achieved by computer simulation. The casting is a real industrial product - an elevator brake wheel made of low carbon steel. Calculations have been made for four different types of casting feedings - using one, two, three, and four main feeders. The distribution of the three principle stresses and the equivalent stresses in the one main feeder version have been shown. The maximum residual stress zones have been defined and the stress values in them have been specified. The formation of the stresses in these zones has been explained as well as the origin of the corresponding stress state. For two of the high value residual stress zones the formation course of the stresses during the casting cooling process has been shown. A comparison has been made between the casting residual stresses in the four considered versions.
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