The fracture behavior of a piezoelectric ceramic under an applied electric field was studied using the modified small punch (MSP) test technique. The MSP energy and maximum strain energy density were calculated to qualitatively account for the effect of electric field on fracture initiation load obtained by the MSP test. The analysis was carried out by assuming a polarization switching model for the specimen material. A finite element model was developed to simulate the relation between MSP energy and applied electric field. The results show that the measured fracture initiation loads and calculated maximum strain energy density are sensitive to the change in the applied electric field and polarization switching.
ASJC Scopus subject areas
- Physics and Astronomy(all)