About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Shock Response of Single-crystal Boron Carbide along Orientations with Extreme Elastic Moduli: MD Simulations and Experimental Comparison |
Author(s) |
Ghatu Subhash, Amith Adoor Cheenady |
On-Site Speaker (Planned) |
Ghatu Subhash |
Abstract Scope |
The influence of planar shock loading on boron carbide single crystal along orientations with the highest and lowest elastic moduli have been simulated using molecular dynamics simulations. Shock loading along the stiffest orientation generates an elastic precursor and a plastic wave while along the most compliant orientation, an elastic precursor is followed by two plastic waves. At particle velocities above 2.5 km/s a reduction in shear strength is observed along both orientations compared to those below 2.5 km/s. For Up > 2.5 km/s, overlapping Hugoniot states and release isentropes were observed due to shock induced temperature exceeding the melting point. Thus an invariance in the Hugoniot state of boron carbide with crystal orientation at high shock intensities is noted. The simulation-derived Hugoniot and hydrostatic curves align well with experimental data up to 140 GPa, while the Us-Up relationships agree with experimental measurements. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Computational Materials Science & Engineering, Mechanical Properties |