Determination of the Dynamic Unload/Reload Characteristics of Ceramics
Abstract
Ballistic impacts on ceramics give rise to many complex phenomena. Common features of many aspects of target response include compressive failure, followed by shear and/or tensile failure, followed by bulk motion (flow) of damaged material. As a leader in both shock physics and terminal ballistic research, the University of Dayton Research Institute (UDRI) performed the study of the behavior of ceramics subjected to these unusual loading conditions which is the subject of this report. To investigate these phenomena we developed, modified, and/or improved a set of impact tests to exercise ceramics in stress states and stress histories that are-characteristic of ballistic impact. This set included the transverse gauge technique, bar impacts, reverberation technique, unload/reload technique, etc. We used these experiments to gain insight into the behavior of ballistic ceramics important to DARPA research groups. Included in the ceramics studied were TiB2 B4C, AIN. We developed correlations, based upon empirical data, between the material properties and the ballistic properties of ceramics. The correlations included the relation of Tate target strength (Rt) to the Hugoniot elastic limit (HEL) and the relation of the loss of shear strength to the ballistic performance of brittle solids.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1992
- Accession Number
- ADA253513
Entities
People
- D. Jurick
- G. Abfalter
- N. Brar
Organizations
- University of Dayton