The Equations of State of Carbon-Fiber Composite, Epoxy Resin, and Carbon and the Principle of Additivity at High Pressures

The equations of state of epoxy resin, carbon-fiber composite, and carbon at high pressures of the megabar range have been developed. The principle of additivity for calculating of the mixed shock adiabat of carbon-fiber composite based on the shock adiabats of epoxy resin and the high-pressure carbon phase is considered. It is concluded that the additivity principle is applicable for calculating the shock adiabats of polymer composite materials in the entire studied pressure range.