Identification of NDE Methods for Inspection Multi-Layer Ceramic Composite Armor
TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
Pagination or Media Count:
In order to establish a preferred NDE method for quantifying damage within multi-layered ceramic composite armor, an Effects of Defects project has been established using a series of 84 16-inch square by 2-inch thick, tiles together with an array of various NDE methods. Some of the armor tiles have had designed defects built in during manufacture, mainly delaminations, inserted within the interior and selectively positioned between various layers. All samples are planned to be ballistically tested at the Aberdeen Army Research Laboratory, ARL, and are to be inspected by an array of NDE methods before and after ballistic testing. The planned outcome of this project is to identify which NDE modality might best be used to quantify ballistically-induced damage in composite ceramic armor. NDE modalities to be used include 1 immersion phased array ultrasonics, 2- through-transmission, direct-digital x-ray imaging, 3-non-contact scanning microwaves, 4-air-coupled ultrasound and 5-immersion, through transmission and pulse-echo single-transducer ultrasound. At this time, all of the 84 samples have been prepared, have been inspected and ballistic testing completed. This paper will discuss the overall project and includes the test samples planned, the test schedule planned, an overview of the NDE techniques to be used and will briefly discuss results obtained.