부산대학교 도서관

In this work, we use computer simulation methods to study crack formation in the refractory lining of steel ladles when the molten metal is poured into a ladle. The aim was to determine thermal and mechanical conditions under which cracks might appear in the lining elements and to predict the direction and length of such cracks. Numerical studies were performed using finite and discrete element methods. Local fracture analysis was carried based on the criteria that take various elementary fracture mechanisms into account. Typical cases of the working lining layer functioning under different mechanical constraints and temperature conditions at the back face, which are determined by specific features of the buffer and heat-insulating lining layers, were considered. General patterns of crack initiation in different areas of lining elements under thermal shock caused by pouring the molten metal into the ladle are specified. The presence of a temperature gradient parallel to the hot face can lead to deviations in the crack trajectory mainly in the direction of the hot area of lining elements. [ABSTRACT FROM AUTHOR]