Stress State of the Solid Fuel of a Rocket Engine Supported by the Shell Under Pulse Loading

The stress state of the solid fuel and the shell of the rocket cylindrical engine demonstration version under impulse normal loading on the internal or external surfaces is investigated in the axisymmetric statement. The fuel material is assumed to be an isotropic linearly viscoelastic material. The solution methodology is based on the approximate Schapery method. The problem is solved by FEM in combination with the Newmark method of time integration. The maximum tensile stresses at the fuel–shell interface and maximum tensile and compressive stresses in the shell in the transient wave process are obtained.