Abstract
A method for developing a mathematical model for numerical calculation of the stress-strain state of a ceramic rod of a cooled gas turbine engine blade in the ceramic rod-ceramic shell form system is described. The ESI ProCAST finite element analysis software package is used for numerical calculation of plastic deformation values in the ceramic rod-ceramic shell form system during pre-calcination. The task of mathematical modeling is to determine the dependence of the stress-strain state (VAT) of a ceramic rod during pre-calcination of the casting block before pouring on the calcination mode. To solve this problem, a finite element grid is generated with a size that provides optimal calculation accuracy. After constructing the grid and optimizing it, the boundary conditions are set. In this case, the boundary conditions are the thermal load, the standard earth gravity, the restriction of movement, and the integral coefficient of the degree of blackness of the body. Analysis of the calculated data obtained is presented as a dependence of the VAT values in the ceramic rod on the calcination mode. The developed calculation scheme allows you to predict the deformation of the ceramic rod during pre-calcination of the casting block and adjust the values of the parameters of the calcination mode of the casting block to reduce scrap and increase the yield of suitable cast blanks.
Keywords
Mathematical model, ceramics, deformation, ProCAST, rod, blade, calcining.