Effect of electrons on equation of state of porous materials

TL;DR

This paper introduces a new equation of state for porous materials that explicitly accounts for electron contributions, accurately modeling their shock behavior across various porosities and matching experimental results.

Contribution

It presents a novel EOS for porous materials that includes electron effects, improving the prediction of shock and Hugoniot behavior over a wide porosity range.

Findings

EOS accurately predicts Hugoniot of copper and aluminium

Electron contribution is significant for porosity ≥ 2

Shock and particle velocity curves match experimental data

Abstract

A new equation of state (EOS) is developed for porous materials in which contribution of electrons is considered explicitly. This EOS describes anomalous behaviour of hugoniot of porous substances as observed experimentally. Using this EOS, hugoniot of copper and aluminium are evaluated for different porosities and the agreement with experimental data is good. The present EOS is valid over a wide range of porosities (1 to 10). The contribution of electrons is significant for porosity greater than equal to 2. Also, shock and particle velocity curves obtained using this EOS agree well with experimental data.