| About this Abstract |
| Meeting |
Materials Science & Technology 2010
|
| Symposium
|
High Strain Rate Behaviors of Composites and Heterogeneous Materials: Experiments, Modeling, and Simulation
|
| Presentation Title |
Edge-on Impact Investigations of Stress and Damage Propagation in Sapphire Single Crystal Plates |
| Author(s) |
Elmar Strassburger, Parimal Patel, James W McCauley |
| On-Site Speaker (Planned) |
James W McCauley |
| Abstract Scope |
This paper will review work carried out with a unique, fully instrumented Edge-on Impact (EOI) facility at the Ernst-Mach-Institute (EMI), using a Cranz-Schardin high speed camera, modified for dynamic photoelasticity, to quantify stress wave propagation, damage nucleation and propagation during high velocity impacts. The experimental technique has been used to examine monolithic single crystal sapphire plates (100x100x10 mm) in crystallographically controlled directions impacted at about 400 m/s with both steel solid cylinders and spheres. The plates were impacted as follows: 100X100 large surface r-plane parallel to the a-axis; large surface a-plane parallel and perpendicular to the c-axis; large surface c-plane parallel to a-axis; and impacting perpendicular to r-plane small surface. In certain orientations damage propagation is clearly by macro-cleavage with significant cleavage branching. Damage and cleavage propagation velocities will be presented. |
| Proceedings Inclusion? |
Definite: A CD-only volume |