Effect of mechanical load on resultant composite piezomodules

A mathematical model has been developed and, on its basis, analytical solutions have found for the resulting "reduced" electroelastic characteristics, in particular, deformation (shear) piezomodules and dielectric permeabilities of a transversal-isotropic piezoelectric material (composite), taking into account corrections due to presence mechanical axial stresses electrodeformational reorientation axis symmetry properties under action an electric field. In initial configuration, tensile and/or compressive do not result shear strains material, shifts are initiated by application field "amplified" configuration. The effect increasing values from was revealed. applied exceed loss stability (elements structure general, composite), which causes preservation also alternating results numerical modeling obtained polymer composite "silicone/PZT-4" with unidirectional fibers circular cross section as partial (limit) case oriented ellipsoidal inclusions using known "generalized singular approximation" based method Green functions statistical mechanics composites calculating tensors effective current Deformation anisotropy calculated through coordinates guide vector - orientation direction composite. It that most significant is manifested fibrous low-modulus matrix at small volume fraction rigid longitudinal stress.