Ceramic materials are used extensively in armor applications for both solider and vehicle protection. Certain ceramics, such as silicon carbide, exhibit piezoelectricity, however the coupling between mechanical and electrical fields is not currently utilized. This paper highlights a unique experimental methodology that measures the in-situ electromechanical response of single crystal 4H and 6H silicon carbide (SiC) under dynamic compression using a Kolsky (split-Hopkinson) bar at strain rates of 10~3 s~(-1). Both damage evolution and electric charge during rapid loading and fragmentation of these two polytypes is presented and discussed in the context of the wurtzite crystal structure.
展开▼
