BRAZILIAN TEST DINAMICO PER LA CARATTERIZZAZIONE DI PROTEZIONI BALISTICHE IN MATERIALE CERAMICO

The aim of this work is to perform Brazilian tests in order to identify the tensile strength of alumina (Corbit98). In this kind of test, generally used for brittle material in static field, a cylindrical specimen is diametrical compressed. As widely discussed in the technical literature, starting from a linear elastic hypothesis, the triaxial stress field generated in the disc has an unique positive component perpendicular to the loading diameter. For the materials with compression strength greater of some order of size respect in tension, the positive component, which is known, leads to the disc failure for separation along the loading diameter. The test is been adapted to dynamic conditions using a setup based on the Split Hopkinson Pressure Bar