And free vibration frequencies of simple layer a electro - elastic plates re given . electro - elastic plates accompanied with normal material plates : firstly using the theories of simply supported and multilayered magneto - electro - elastic plates , without considering the magneto and electric effect , the general solution formulation of simply supported and multilayered plates are given 对于简支压电复合材料层合板问题，首先由简支压电压磁弹性层合板问题的理论推导，不考虑其磁、电耦合效应，可以得到一般层合板的状态变量表达式。
The interaction effects between circular interfacial cracks or rigid line inclusions and a screw dislocation located either outside or inside inhomogeneity under antiplane shear , the electroelastic interaction between a piezoelectric screw dislocation located either outside or inside inhomogeneity and circular interfacial cracks and rigid lines under longitudinal mechanical and inplane electrical loads in linear piezoelectric materials and the elastic interaction between an edge dislocation located either outside or inside inhomogeneity and interfacial crack along a circular inhomogeneity are dealt with in this paper 本文首次对位错与圆形弹性夹杂界面典型缺陷的力、电干涉进行研究，解决了无穷远反平面剪切作用下螺型位错与含界面裂纹或界面刚性线圆形夹杂的弹性干涉问题；无穷远纵向剪切和面内电场共同作用下压电螺型位错与含界面裂纹或界面刚性线圆形压电夹杂的力电耦合效应问题：刃型位错与含界面裂纹圆形弹性夹杂的干涉问题。
An anomalies in the dielectric constants and loss tangent have been observed experimentally in the ferroelectromagnet near the antiferromagnetic transition temperature , indicative of a coupling between the ferroelectric and magnetic ordering , but the nature of the mechanism of magnetoelectric coupling and the form of interaction is still an important and debated issue 而另一类是铁电磁体，它除了具有一般磁电体的性质外，还由于固有的本征磁有序和铁电有序的耦合使之存在自发的磁电效应。实验上已经发现了由于自发的磁电耦合导致的介电异常和损失正切。
By magnetoelectric coupling , the application of an electric field or ferroelectric polarization can change one or more of the parameters governing the ma gnetic behavior of the system . correspondingly , being possible magnetostrictive effect or electron - phonon interaction , the fluctuation of spin ordering may lead to a dielectric anomaly and ferroelectric relaxation 通过磁电耦合，铁电有序或外电场可导致自旋的再分布而改变系统的磁性性质，同样由于自旋有序的涨落通过磁致伸缩或可能的电-声子作用可导致铁电弛豫或介电异常。
The self - consistent method based on hill ' s theory is extended to be applicable to ferroelectrics . the introduction of global iteration and local iteration under loading of electric and / or stress fields calculate the nonlinear electromechanical coupling behavior . ( 3 ) the electro - mechanical coupling behavior of layer - structured ferroelectric composites is investigated and predicted ? ?通过采用基于hill理论的扩展的自洽计算方法，将其从一般多晶材料、复合材料的纯力学性能描述，扩展到具有力电耦合的复杂情况，建立其整体迭代和局部迭代的计算方法，得到铁电多晶材料的非线性力电耦合关系的描述。
