About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
G-13: Nanoscale Liquid Infiltration – an Ultra-fast Deformation Mechanism for Energy Mitigation |
Author(s) |
Mingzhe Li, Weiyi Lu |
On-Site Speaker (Planned) |
Weiyi Lu |
Abstract Scope |
Inspired by the capillary effect, forced liquid infiltration into hydrophobic nanopores has been employed as an advanced energy absorption mechanism in liquid nanofoam (LN) systems. The energy dissipating mechanism is to force a non-wetting liquid to flow into hydrophobic nanopores, converting the external mechanical energy into solid-liquid interaction energy and heat. However, under dynamic impacts whether liquid infiltration can be fully activated is fundamentally unanswered. To this end, we have experimentally investigated the competition between liquid infiltration and pore crushing at the nanoscale.
Under a wide range of strain rates from quasi-static compression to dynamic impact, our results show that the nanopores in LN remain undeformed, as demonstrated by the strain rate-independent liquid infiltration behavior. These findings offer a mechanistic explanation for the ultra-fast energy dissipation rate and high energy absorption efficiency of LN at high strain rate impact and blast scenarios. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Nanotechnology |