Influence of anisotropy and viscosity on propagation on waves in multilayer cylinders

A study is presented of the influence of viscosity and anisotropy of the material of several layers of a cylinder of finite length on the propagation of waves caused by the application of an axisymmetrical pressure pulse. The equations of motion of the solid deformed body are integrated by the method of finite differences. An analysis is presented of the influence of the direction of the fibers of an orthotropic layer on the distribution of stresses, as well as the viscosity properties of the layers on wave attenuation. It is shown that the use of outer layers of viscous materials can significantly decrease the stress level in inner layers. This effect increases with a decrease in the duration of loading. For short load pulses which cannot influence the dynamics of the entire structure, the direction of fibers along the line of action of the load increases strength.