A comprehensive analysis algorithm for ablation, temperature fields, and thermal stresses of the carbon-base nosetips

In this paper, the principle of synthetic analysis calculation and some treatment techniques about reentry thermal environment, ablation, conduction, and thermal stresses of vehicles are described briefly. The thermochemical ablation calculation for chemical reactions on the ablating surface of carbon-base materials is simplified by using selective calculation results. The temperature fields are calculated by means of three level explicit difference schemes for both constant and unconstant space steps within the total region. The thermostresses are calculated by the finite element method, which is based on noncomplete generalized potential energy variational principles under the supposed condition of linear elasticity. The calculation method of the effects for various displacement boundary conditions is provided. An automatic mesh dividing technique is realized in the comprehensive analysis procedure, and selective calculations for shapes can be conveniently made with this technique.