Abstract: To reveal the internal correlation between material microstructure and electromagnetic field effect by incident electromagnetic wave quantitatively, with Poynting vector which can characterize the direction and size of energy flow, the numerical calculations are realized by means of program and finite element. The finite element model of numerical simulation for analysis on electromagnetic field effect of material microstructure is established. In the numerical calculations, the absorption, transmission and reflection effect in the direction of wave source are obtained by that the Poynting vector is orthogonal decomposed into three directions. The reflection of any direction is calculated by the component of Poynting vector in the reflection direction. The research method is suitable for any microstructures.

Key words: metallic materials, electromagnetic field effect, numerical simulation, material microstructure, Poynting vector

摘要： 为了定量揭示材料微结构与入射电磁波引起的材料内电磁场效应之间的内在关联性，借助可以表征能量流动方向和大小的Poynting矢量，通过程序设计结合有限元数值模拟的方法实现了材料微结构电磁场效应的计算。建立了材料微结构电磁场效应数值分析有限元模型。在数值计算中，将Poynting矢量正交分解为三个不同方向分量，计算了材料微结构的吸收、透射和波源方向反射效应；根据Poynting矢量在反射方向的分量，计算了任意反射方向的反射效应。研究方法对任意微结构均具有适用性。

关键词: 金属材料, 电磁场效应, 数值模拟, 材料微结构, Poynting矢量