About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Materials for Harsh Environments
|
| Presentation Title |
Incipient Deformation and Fracture of Metals and Ceramics During Dynamic Loading and Ballistic Impact |
| Author(s) |
Brian E. Schuster, Brian E. Schuster |
| On-Site Speaker (Planned) |
Brian E. Schuster |
| Abstract Scope |
We will review the development and application of small-scale dynamic and integrative experiments that have been used to guide materials-based design efforts for metallic and ceramic armor materials. We have employed time-resolved synchrotron-based X-ray phase contrast imaging and diffraction at the Dynamic Compression Sector (Sector 35) at the Advanced Photon Source on critical loading paths to elucidate the incipient deformation and fracture mechanisms. We imaged the fracture behavior of structural ceramics in the first microsecond after impact, measured the stresses required for the onset of penetration, and estimated the target strengths after the onset of penetration. The above techniques have been applied widely to a range of different candidate materials including monolithic and engineered ceramic composites. While some frequently point to optimizing the strength to weight ratio of ceramics (or hardness to density ratio), the results from these studies suggest the tensile strength and inelastic response on a 1-D strain loading path are the most important descriptors of the ability of a material to resist the onset of penetration in simplified rod impact experiments. |