TY - JOUR
T1 - Flexoelectric Fracture-Ratchet Effect in Ferroelectrics
AU - Cordero-Edwards, Kumara
AU - Kianirad, Hoda
AU - Canalias, Carlota
AU - Sort, Jordi
AU - Catalan, Gustau
PY - 2019/4/2
Y1 - 2019/4/2
N2 - © 2019 American Physical Society. The propagation front of a crack generates large strain gradients and it is therefore a strong source of gradient-induced polarization (flexoelectricity). Herein, we demonstrate that, in piezoelectric materials, a consequence of flexoelectricity is that crack propagation is helped or hindered depending on whether it is parallel or antiparallel to the piezoelectric polar axis. The discovery of crack propagation asymmetry proves that fracture physics cannot be assumed to be symmetric in polar materials, and indicates that flexoelectricity should be incorporated in any realistic model.
AB - © 2019 American Physical Society. The propagation front of a crack generates large strain gradients and it is therefore a strong source of gradient-induced polarization (flexoelectricity). Herein, we demonstrate that, in piezoelectric materials, a consequence of flexoelectricity is that crack propagation is helped or hindered depending on whether it is parallel or antiparallel to the piezoelectric polar axis. The discovery of crack propagation asymmetry proves that fracture physics cannot be assumed to be symmetric in polar materials, and indicates that flexoelectricity should be incorporated in any realistic model.
UR - http://www.mendeley.com/research/flexoelectric-fractureratchet-effect-ferroelectrics
U2 - 10.1103/PhysRevLett.122.135502
DO - 10.1103/PhysRevLett.122.135502
M3 - Article
C2 - 31012630
SN - 0031-9007
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
M1 - 135502
ER -