Thermal stresses and their influence on the character of fracture in the rollers of continuous steel-casting installations

Autor: Denisov, Yu. V., Komissarova, M. L., Konstantinov, G. V., Niskovskikh, V. M.
Zdroj: Strength of Materials; May 1977, Vol. 9 Issue: 5 p575-580, 6p
Abstrakt: Conclusions 1.We have obtained an analytical solution to the boundary problem of thermoelasticity with time-dependent boundary conditions. At the internal points of the region the temperature and stresses have periodic components determining the transient nature of the fields in question as t?8. For a numerical calculation of the temperature and stresses we have set up programs in the FORTRAN language and executed calculations in the BÉSM-6 computer.2.The influence of the periodic components of the temperature and stress fields is mainly restricted to the surface layer. The thickness of this layer depends very greatly on the angular velocity, varying from 1% at ?=14.3 sec-1 to 15% at ?=0.062 sec-1. The high values of the stress tensor components are located in the layer of periodic temperature and stress variation.3.The existence of a temperature field changes the character of the stressed state and the character of the fracture. From soft forms of stressed state and fracture by shear there is a transition to hard forms of loading and fracture by tearing (detachment).
Databáze: Supplemental Index
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