Shock response of open-cell nanoporous Cu foams: Effects of porosity and specific surface area

WR Jian and B Li and L Wang and XH Yao and SN Luo, JOURNAL OF APPLIED PHYSICS, 118, 165902 (2015).

DOI: 10.1063/1.4934244

We investigate the effects of porosity or relative mass density and specific surface area on shock response of open-cell nanoporous Cu foams with molecular dynamics simulations, including compression, shock velocity-particle velocity, and shock temperature curves, as well as shock-induced melting. While porosity still plays the key role in shock response, specific surface area at nano-scales can have remarkable effects on shock temperature and pressure, but its effects on shock velocity and specific volume are negligible. Shock-induced melting of nanofoams still follows the equilibrium melting curve for full-density Cu, and the incipient and complete melting temperatures are established as a function of both relative mass density and specific surface area. (C) 2015 AIP Publishing LLC.

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