涂层对复合材料电-磁-弹性性能的影响

研究带界面层的双周期排列电磁弹性纤维复合材料在远场反平面机械载荷和面内电磁载荷作用下的电-磁-弹性响应,结合本征广义应变(本征应变、本征电场、本征磁场)的概念和双准周期Rimann边值问题理论为其发展了一个严格的解析分析方法.解答可用于对胞元内电磁弹性场量进行精细分析,也可对复合材料有效电磁弹性模量做出准确预测.以纯弹性环氧树脂涂层为例,分析了涂层对应力集中系数和有效电磁弹性模量的影响.本文结果可作为一个"基准",用以评价有限元等数值与近似方法的精度.

EFFECTS OF COATING ON ELECTRO-MAGNETO-ELASTIC PROPERTIES OF COMPOSITES

The electro-magneto-elastic composites containing a doubly periodic parallelogrammic array of fibers with interphase are dealt with under antiplane shear load coupled with inplane electromagnetic load,a rigorous analytical method is developed by using the generalized eigenstrain (eigenstrain,eigen-elec-tric-field and eigen-magnetic-field) concepts integrated with the doubly quasiperiodic Riemann boundary value problem theory. The present solution can be used to analyze electro-magneto-elastic fields in unit cell and predict the macroscopic electro-magneto-elastic effective moduli of composites exactly. Illustrative examples show the effects of epoxy coating on the stress concentration factor and electro-magneto-elastic effective moduli. The present method can provide benchmark results for other numerical and approximate methods.