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Ultrahigh Strain Rates

LAMMPS tutorials on the simulations of shock wave propagation and ballistic impact

Submitted by Nuwan Dewapriya on
research
Ballistic Impact Response
Ultrahigh Strain Rates
Shock Wave Propagation
molecular dynamics
Spallation

We are currently investigating the shock response of materials using molecular dynamics (MD). This project showed us that the preparation of properly equilibrated MD models can be very challenging even for someone with a strong background in molecular modeling. Therefore, we thought of sharing some of our recent MD models with the research community. We would like to share the LAMMPS input and data files required to run MD simulation of shock wave propagation and ballistic impacts. The two MD models are shown above.

Energy absorption mechanisms of nanoscopic multilayer structures under ballistic impact loading

Submitted by Nuwan Dewapriya on
research
Ultrahigh Strain Rates
Adiabatic Shock Heating
Shock Wave Propagation
Shock Hugoniot
Spallation
molecular dynamics

 

Our latest article on the ballistic performance of polymer/metal nanostructures is freely available for 50 days from today: https://authors.elsevier.com/a/1cy9c3In-urcWx

Atomic-Scale Investigation on the Mechanical Behavior of Ultrathin Multilayers Under Shock Loading

Submitted by Nuwan Dewapriya on
research
Ballistic Impact Response
Ultrahigh Strain Rates
Adiabatic Shock Heating
Shock Wave Propagation
Shock Hugoniot
Spallation
Ballistic Limit Velocity
molecular dynamics
DFT

Recent advances in microprojectile impact tests have opened a new route to explore the behaviors of nanomaterials under extreme dynamic conditions. For example, impact tests have revealed that the specific penetration energies of ultrathin polymer films are remarkably high compared to the energies of conventional protective materials. The current experimental techniques are, however, unable to elucidate some of the complex atomistic mechanisms associated with the penetration process, which can only be realized through atomistic simulations.

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