摘要
Comsidering the fact there are no systematic study on crack effected by large-scale near--tip nonlinearitiesup to now, a nonlinear finite element formulation accounting for nonlinearities and elasticity coupled with piezoelectricity is derived and a finite element program is developed. Numerical examples are presented to show the effect of nonlinear fracture characteristics on fracture resistance. It is found that an electric field may give a negative driving forceto prevent crack propagation.
Comsidering the fact there are no systematic study on crack effected by large-scale near--tip nonlinearitiesup to now, a nonlinear finite element formulation accounting for nonlinearities and elasticity coupled with piezoelectricity is derived and a finite element program is developed. Numerical examples are presented to show the effect of nonlinear fracture characteristics on fracture resistance. It is found that an electric field may give a negative driving forceto prevent crack propagation.
