Temperature stress accumulation in polymer composite shells under cyclic temperature impact

The object of research is a polymer composite based on thermosetting epoxy binder and EZ-200 fiberglass fabric. Its behavior in the operating conditions of industrial chimneys, which include high temperatures, long-term operation, cyclic mechanical and temperature impact, and prolonged thermal aging, is yet to be determined. Viscoelasticity of polymer matrix leads to several possible effects. One is the accumulation of temperature stresses due to non-stationary temperature effects. This work aims to evaluate the possibility of such an effect and assess it. It required us to conduct cyclic heating tests and FE shell calculations.