| 考虑记忆效应及尺寸效应窄长薄板的磁-热弹性耦合动态响应 |
| |
| 引用本文： | 马永斌,李东升. 考虑记忆效应及尺寸效应窄长薄板的磁-热弹性耦合动态响应[J]. 应用数学和力学, 2022, 43(8): 888-900. DOI: 10.21656/1000-0887.420200 |
| |
| 作者姓名： | 马永斌 李东升 |
| |
| 作者单位： | 兰州理工大学 理学院，兰州 730050 |
| |
| 基金项目： | 国家自然科学基金（12062011；11972176） |
| |
| 摘 要： | 引入记忆依赖微分的双相滞后热弹性理论能较完善地描述非Fourier导热现象，然而迄今尚未发现该理论综合考虑微尺度效应和磁、热、弹等多场耦合效应对材料力学行为的影响.通过考虑记忆依赖效应和非局部效应修正了双相滞后广义热弹性理论，基于改进后的理论研究了受周期性变化热源作用时窄长薄板的磁-热弹性耦合问题.首先建立问题的控制方程；然后结合边界条件与初值条件，利用Laplace变换和反变换技术对该问题进行求解；最后分别考察了磁场、相位滞后、时间延迟因子、核函数、非局部效应、时间对各无量纲量的影响，为微尺度材料的动态响应提供了有力参考依据.
|
| 关 键 词： | 双相滞后热弹性理论 非局部效应 记忆依赖微分 多场耦合 Laplace变换 动态响应 |
| 收稿时间： | 2021-07-13 |
Magneto-Thermoelastic Coupling Dynamic Responses of Narrow Long Thin Plates Under Memory Effects and Size Effects |
| |
| Affiliation: | School of Science, Lanzhou University of Technology, Lanzhou 730050, P.R.China |
| |
| Abstract: | The dual-phase-lag thermoelasticity theory with the memory-dependent differential can perfectly describe the phenomenon of non-Fourier heat conduction, nevertheless, it has not been comprehensively considered: the mechanical responses of materials under the size-dependent effects and the multiphysics coupling effects such as magnetic, thermal and elastic fields. A modified dual-phase-lag thermoelasticity theory with memory-dependent effects and non-local effects was established. Based upon this theory, the magneto-thermoelastic coupling problem of narrow long thin plates subjected to cyclical heat sources was investigated. First, the governing equations for the problem were formulated. Then with the boundary conditions and initial conditions, the solution to the problem was obtained through the Laplace transform and the inverse transform techniques. Finally, the influences of the magnetic field, the phase lag, the time-delay, the kernel function, non-local effect and the time on the dimensionless quantities were investigated respectively. The work provides a powerful reference for the dynamic responses of micro-scale materials. |
| |
| Keywords: | |
|
| 点击此处可从《应用数学和力学》浏览原始摘要信息 |
|
点击此处可从《应用数学和力学》下载免费的PDF全文 |
