About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Multi-mechanism Models for Impact on Ceramics |
Author(s) |
Nilanjan Mitra, Weixin Li, K T Ramesh |
On-Site Speaker (Planned) |
Nilanjan Mitra |
Abstract Scope |
Ceramics are typically brittle, and fracture and fragmentation can lead to disintegration into a granular material under conditions such as impact. However, these materials demonstrate numerous mechanisms depending on the stress state and the timescales. The initial material usually contains defects such as stacking faults, inclusions and voids, and descriptions of the global behavior require a micromechanics based approach coupled with an equation of state model. Associated mechanisms include amorphization, dislocation-based plasticity, fracture, damage, fragmentation, and granular flow. We have developed a multi-mechanism model within a finite deformation framework that can be used across a wide range of loading conditions. We describe the model, and discuss spherical and cylindrical projectile impact on thin plates and thick cylinders of boron carbide and silicon carbide to demonstrate the capabilities of the model. This work was developed as part of the MEDE program, funded by the US Army Research Laboratory. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Modeling and Simulation, |