Electrical Field and Plasticity for Polar Materials
For polar materials, the polar molecular will rotate locally when electrical field is applied. When the electrical field is big enough, the fractures will appear in material. In this paper, the material composed by rigid polar molecular is studied. The elastoplastic deformation under electrical field is theoretically formulated to explain the relation between micro geometry and macro geometry. The macro geometry is defined by the traditional strain. The micro geometry is described the base vector transformation of material coordinators. The research shows that there are the two basic plastic configurations of macro geometry. They are named as type-I and type-II elastoplasticity. The type-I elastoplasticity is characterized with plastic contraction on the normal plane of electrical field. The type-II elastoplasticity is characterized with plastic expansion on the electrical field direction. The critical field strength is expressed by the material yield-stress. When the electrical field is bigger than the critical value, the volume ratio of voids or cracks is expressed by the filed strength.
Jianhua Xiao
Henan Polytechnic University,Jiaozuo,Henan 454000,China
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-5
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）