Molecular Dynamics Simulations Of The Mechanical Behavior Of Graphene Under Impact By Fullerene

The excellent mechanical properties of graphene make it an ideal material in the field of impact protection.It is significant to study the deformation mechanism of graphene under a high velocity impact.Due to difficulties in experiments and calculations,the mechanical behavior of graphene under the action of a projectile is rarely studied.Thus,molecular dynamics simulations are used in this paper to study the mechanical behavior of single-layer and rotating double-layer graphene under a high velocity impact.The AIREBO potential is widely used in molecular dynamics simulations in this paper.This research provides a basic understanding of the deformation mechanism and perforation dynamics of graphene under impact,show that graphene has potential applications in the field of impact protection materials,and achieves the following research results:1.The stress wave propagation of single-layer graphene is studied,and the velocities of cone waves and axial waves are calculated.The simulation results show that the higher cone and axial wave velocities show that single-layer graphene can perform well in the impact process.The ground dissipates the impact energy.2.We study the coefficient of restitution of double-layer graphene under different impact angles and impact velocity.Based on the calculated value of the restitution coefficient of double-layer graphene,our simulation results show that for low-angle and high-speed incidence,the double-layer graphene has a better energy reduction effect in the vertical direction.Next,we monitor the impact and rebound kinetic energy of the projectile under the impact simulation of the double-layer graphene with different rotation angles.3.The perforation behavior of graphene under the impact of a higher velocity projectile is studied,the displacement,velocity,and kinetic energy of the fullerene projectile are monitored,and the different failure modes of graphene are analyzed.