This paper presents the effect of piezoelectric interphase thickness on the nonlinear behavior of multiphase magneto–electro–elastic (MMEE) fibrous composite plates. A layer-wise shear deformation theory has been considered for the kinematics of the MMEE plate integrated with the principle of virtual work in a three-dimensional finite element (FE) formulation. To incorporate the effect of piezoelectric interphase thickness on the nonlinear behavior of the plate, the multiphase fibrous composite substrate considered for the evaluation is consists of carbon fibers surrounded by a thin coating of piezoelectric fiber (PZT-7A) embedded in piezomagnetic (cobalt ferrite-CoFe₂O₄) matrix material. The influence of piezoelectric and piezomagnetic coupled fields on the stiffness and nonlinear behavior of MMEE (CoFe₂O₄/PZT-7A/Carbon) composites considerably varies with PZT-7A interphase thickness. Thus, the transient response, nonlinear frequency ratio, and nonlinear deflection of the structure remarkably changes. Besides, the variation of fiber/matrix volume fraction and interphase thickness exhibits tremendous influence on the nonlinear behavior of the MMEE fibrous composite plate. Further attention has been paid to investigate the influence of boundary conditions, aspect ratio, volume fraction, and coupled fields on the nonlinear behavior of the MMEE fibrous composite plate.

本文介绍了压电相间厚度对多相磁电弹性纤维复合板非线性行为的影响。对于MMEE板的运动学，已经考虑了分层剪切变形理论，并结合了三维有限元（FE）公式中的虚拟功原理。为了整合压电相间厚度对板的非线性行为的影响，评估中考虑使用的多相纤维复合基材由碳纤维组成，该碳纤维被包裹在压电体（钴铁氧体中）的压电纤维薄涂层（PZT-7A）包围钴铁₂ O ₄）基质材料。压电和压电耦合场对MMEE（CoFe ₂ O ₄ / PZT-7A / Carbon）复合材料的刚度和非线性行为的影响随PZT-7A相间厚度的不同而有很大差异。因此，结构的瞬态响应，非线性频率比和非线性挠度显着变化。此外，纤维/基体体积分数和相间厚度的变化对MMEE纤维复合板的非线性行为也显示出极大的影响。为了研究边界条件，长宽比，体积分数和耦合场对MMEE纤维复合材料板非线性行为的影响，人们已经给予了更多关注。