Kanan Anas, Vasilev Aleksandr, Breitkopf Cornelia, Kaliske Michael
Institute for Structural Analysis, Technische Universität Dresden, 01062 Dresden, Germany.
Chair of Technical Thermodynamics, Technische Universität Dresden, 01062 Dresden, Germany.
Materials (Basel). 2022 Jan 20;15(3):783. doi: 10.3390/ma15030783.
In this contribution, a computational thermo-electro-mechanical framework is considered, to simulate coupling between the mechanical, electrical and thermal fields, in nonhomogeneous electro-active materials. A thermo-electro-mechanical material model and a mixed Q1P0 finite element framework are described and used for the simulations. Finite element simulations of the response of heterogeneous structures consisting of a soft matrix and a stiff incluison are considered. The behavior of the composite material is studied for varying initial temperatures, different volume fractions and various aspect ratios of the inclusion. For some of the examples, the response of the structure beyond a limit point of electro-mechanical instability is traced. Regarding the soft matrix of the composite, thermal properties of silicone rubber at normal conditions have been obtained by molecular dynamics (MD) simulations. The material parameters obtained by MD simulations are used within the finite element simulations.
在本论文中，考虑了一个计算热-电-力学框架，用于模拟非均匀电活性材料中机械、电和热场之间的耦合。描述了一个热-电-力学材料模型和一个混合Q1P0有限元框架，并将其用于模拟。考虑了由软基体和硬夹杂组成的非均质结构响应的有限元模拟。研究了复合材料在不同初始温度、不同体积分数和夹杂的各种纵横比下的行为。对于一些例子，追踪了结构在机电失稳极限点之后的响应。关于复合材料的软基体，通过分子动力学（MD）模拟获得了正常条件下硅橡胶的热性能。通过MD模拟获得的材料参数用于有限元模拟。
