[SY-O7] Symposium O-7

[SY-O7] A new damage implementation for Smooth Particle Hydrodynamics and its application to simulating the wear response of metals.

^○Alban de Vaucorbeil, Christopher Hutchinson (Monash University, Australia)

Simulations of materials and structures submitted to wear, machining, forming, forging, and impacts, to name but a few, often involve large deformations, damage, and failure. These phenomena are challenges for usual computational tools such as finite element modeling. When large deformations occur, finite element methods have limitations due to the need to remesh which is computationally expensive and sometimes fails. Therefore, mesh-free methods such as Smooth Particle Hydrodynamics (SPH) are more suitable for these applications.

The use of SPH for the simulations of wear, tribology, and impacts problems in solids has recently gained momentum as large deformations and instability phenomena such as damage and fracture could be easily handled. However, little work exists on the implementation of damage in SPH. This is thought to be due to the approximation problems around surfaces. As damage and fracture develops in solids, this creates new surfaces around which the SPH approximation breaks down.

In this presentation, we present the results of simulations of wear response to show case a new implementation of damage in SPH that solves some of the problems due to the approximation break-downs close to surfaces. This implementation is built as an upgrade of the SPH package for solids available within LAMMPS called Smooth Mach Dynamics.