| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Calibrating Empirical and Micromechanical Constitutive Models beyond 10^6 s^-1 |
| Author(s) |
Xuchen Wang, Mostafa Hassani |
| On-Site Speaker (Planned) |
Mostafa Hassani |
| Abstract Scope |
Recent advances in resolving impact-induced deformation of microprojectiles travelling at ~100 m/s to ~1 km/s have opened new and unique opportunities for studies of materials response under dynamic loading in a relatively less explored regime of strain rates, i.e., beyond 106 s-1. This regime is particularly relevant to the conditions experienced in ballistic impacts, impulsive loadings, blasts, as well as some of the kinetic energy-based processes such as cold spray coating. Here we implement a number of constitutive models from empirical to micromechanical into a finite element code and study plastic deformation of spherical metallic microparticles impacting rigid substrates at a few hundred m/s. Linking our finite element simulations to real time observations of plastic deformation through an optimization framework, we show that we can accurately calibrate the constitutive models and discuss the underlying deformation mechanisms in the 106-109 s-1 strain rate regime. |
| Proceedings Inclusion? |
Undecided |