Mechanism based Integrative model for projectile impact simulation of materials

The integrative model “integrates” various mechanisms at the continuum level which can possibly be developed within the target material subjected to projectile impact. The possible mechanisms that can be developed within the material include evolution of the initial cracks which has been modeled based on micromechanics concepts of Eshelby as well as nucleation and evolution of amorphization, subgrain plasticity and granular flow. Mie Gruniessen Equation of state has been defined to relate the pressure and temperature in the system. The choice of the target material along with the type of loading scenario defines the type of mechanisms that are activated within the target material. Complex canonical loading conditions such as spherical impact on a cylinder, spherical impact on a confined cylinder, rod impact on a cylinder as well as edge on impact conditions have been simulated and activation of different mechanisms have been demonstrated in this study. It is anticipated that the mechanism based simulation framework will be used for design of ceramic materials for projectile impact situations. Within the “design of material” framework, the model is able to provide predictive recommendation to a manufacturing person with regards to choice of material along with this flaw distribution, size, orientation as well as provide recommendation to a structural component designer with regards to thickness of the target, backing and confinement of the target.