A super energy mitigation nanostructure at high impact speed based on buckyball system

Area of Science:

• Materials Science
• Nanotechnology
• Computational Physics

Background:

• Fullerenes, particularly buckyballs, exhibit unique mechanical properties.
• Understanding energy absorption mechanisms in nanomaterials is crucial for impact mitigation.

Purpose of the Study:

• To investigate the energy mitigation capabilities of fullerene-based structures using molecular dynamics simulations.
• To compare the performance of C60 and C720 buckyballs in energy dissipation.

Main Methods:

• Molecular dynamics (MD) simulations were employed.
• A one-dimensional chain model of granular fullerene particles (C60 and C720) was utilized.
• A dissipative contact model was developed for C60 simulations.

Main Results:

• C60 buckyball chains mitigated over 90% of impact energy through wave propagation, van der Waals forces, and potential/kinetic energy dissipation.
• C720 buckyball chains, with non-recoverable deformation, mitigated over 99% of kinetic energy, outperforming C60.
• Energy mitigation performance was systematically analyzed concerning impactor properties and fullerene chain characteristics.

Conclusions:

• One-dimensional fullerene chains, especially C720, demonstrate high-efficiency energy mitigation.
• These findings offer insights for designing advanced materials for impact absorption, particularly for high-speed, low-mass impactors.