Electromagnetic-mechanical-thermal fully coupled model for Terfenol-D devices
Electromagnetic-mechanical-thermal fully coupled model for Terfenol-D devices
复制标题
Terfenol-D 器件的电磁-机械-热全耦合模型
DOI：
10.1063/1.4916810
复制
发表时间：
2015-05-07
影响因子：
3.2
通讯作者：
Wang, Bowen
中科院分区：
文献类型：
--
作者：
Huang, Wenmei;Deng, Zhangxian;Wang, Bowen
This paper presents a fully coupled, nonlinear electromagnetic-mechanical-thermal model for Terfenol-D devices which include active magnetostrictive materials and passive components. The model includes two parts: (1) a material-level discrete energy-averaged model (DEAM) to describe the magnetomechanical coupling and thermal effect of Terfenol-D and (2) a system-level finite element model formulated in weak form using Maxwell's equations, Newton's law, and heat transfer equations. The objective is to describe the electromagnetic, mechanical, and thermal dynamics of the device. The system finite element model is constructed in COMSOL Multiphysics, and the nonlinear behavior of Terfenol-D is coupled through lookup tables generated by the DEAM. Preliminary results of the output capacity of a Terfenol-D actuator with respect to ambient temperature are presented in terms of blocked force, free displacement, and output power. The blocked force and free displacement decrease by 8.0% and 29.8%, respectively, for ...
