Realization of the solution of viscoelasticity’ problems for a pipe from a functional gradient material

The stress-strain state of a viscoelastic tube made of inhomogeneous materials under the action of internal pressure is determined. The main dependences for the calculation of pipes made of heterogeneous materials are presented. On the basis of the received formulas for finding deformations the computer program of calculation of deformations in a pipe changing in time is created. The implementation of calculations of the stress-strain state in the pipe and the parameters of creep and relaxation nuclei is presented.