Thermal stresses in composite structures under high temperatures

Abstract

Since many stress-strain problems for elements of structures made of ablative compositesmay be considered as axisymmetric, the thermomechanics problem is set in terms of both stresses and displacements for the axisymmetric case. The purpose of the present chapter is to investigate processes of internal heat-masstransfer and the appearance of thermal stresses in composite structures of heatenergetic systems and also in composite structures under gas-dynamical heating, aerodynamical heating and local heating by radiation, within the scope of an axisymmetric (two-dimensional) statement of the problem. Computed results exhibit the effect of composite characteristics on durability of the composite structure and show that tensile tangential and transverse stresses are the most dangerous ones for laminated ablative composites.