抄録
In this work, the study on the influence of the root radius of the notch (ρ) on fracture load of piezoelectric ceramics under various electric fields was carried out through three point bending test. And the linear finite element analysis (FEA) applied the concept of Crack Energy Density (CED) as a possible fracture parameter in piezoelectricity was also performed. As the results, the fracture loads were decreased according to decreasing of the root radius of the notch but, in contrast to the results of FEA, the fracture loads in case of the crack with ρ=0 were increased. Finally, the possibilities of CEDs as the governing fracture parameter were discussed.
