Transient Thermal Stress in Slab of which Surfaces are Heated by Heat Transfer

Abstract

This paper is concerned with the thermal stresses in a restrained-in-bending slab suddenly heated and cooled from both sides with a finite heat transfer coefficient. Such cases are very common in industries, so non-dimensional thermal stresses are calculated by computer with various Biot numbers at both sides of the slab. From these analyses the following results are obtained. (1) The thermal stresses are more influenced by the degree of heat transfer on heated side than by that on cooled side. (2) At the same temperature difference the thermal stresses become greater with better heat transfer. (3) Transient maximum thermal stress, which is a thermal shock, and the final residual thermal stress, which is a steady thermal stress, are compared with each other for various cases, and the former is shown to be important in the case where the heat transfer on heated surface becomes high.