@Article{icces.2023.09368,
AUTHOR = {Yong Zhang, Jie Wang},
TITLE = {Phase Field Modeling of Coupling Evolution of Polarization, Fracture and  Dielectric Breakdown in Ferroelectric Materials},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n1/54090},
ISSN = {1933-2815},
ABSTRACT = {Ferroelectric materials have been widely used in various electromechanical devices such as sensors, 
actuators, transducers and energy storage devices due to their distinguished electromechanical coupling 
properties. Ferroelectric materials usually bear large mechanical loads and high electric fields in order to 
give full play to their potential. The interaction between fracture and dielectric breakdown is able to occur 
since the filler inside a crack will change the dielectric behaviors around it and dielectric breakdown can 
change the local mechanical properties of dielectric materials because of its weakening of chemical bonds. 
Therefore, a comprehensive and in-depth understanding of the fracture and dielectric breakdown behavior 
of ferroelectric materials and their interaction is very important for the advanced and reliable application 
of ferroelectric materials. A phase field model was developed to investigate the coupling evolution behavior 
of polarization, fracture and dielectric breakdown in ferroelectric materials subjected to both mechanical 
and electrical loadings. Driving forces for fracture and dielectric breakdown were analysed based on the 
generalized configurational forces. The phase field simulations showed that dielectric breakdown can be 
induced by the concentrated electric field at impermeable crack tips. At the same time, the dielectric 
breakdown can influence the stress distribution around the crack tip as well as the driving force for crack 
propagation. The attraction of fracture to breakdown path and the deflection of breakdown to fracture path 
were observed during the coupling evolution of fracture and breakdown. The developed model framework 
can be employed to investigate more complex coupling failure behaviours of ferroelectric and dielectric 
materials.},
DOI = {10.32604/icces.2023.09368}
}