Transmitting multiple high-frequency phonons across length scales using the concurrent atomistic–continuum method
Transmitting multiple high-frequency phonons across length scales using the concurrent atomistic–continuum method
复制标题
使用并发原子连续谱方法跨长度尺度传输多个高频声子
DOI:
10.1016/j.commatsci.2022.111702
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发表时间:
2022
影响因子:
3.3
通讯作者:
Agrawal, Vinamra
中科院分区:
文献类型:
--
作者:
Davis, Alexander S.;Agrawal, Vinamra
Coupled atomistic–continuum methods can describe large domains and model dynamic material behavior for a much lower computational cost than traditional atomistic techniques. However, these multiscale frameworks suffer from wave reflections at the atomistic–continuum interfaces due to the numerical discrepancy between the fine-scaled and coarse-scaled models. Such reflections are non-physical and may lead to unfavorable outcomes such as artificial heating in the atomistic region. In this work, we develop a technique to allow the full spectrum of phonons to be incorporated into the coarse-scaled regions of a periodic concurrent atomistic–continuum (CAC) framework. This scheme tracks phonons generated at various time steps and thus allows multiple high-frequency wave packets to travel between the atomistic and continuum regions. Simulations performed with this method demonstrate the ability of the technique to preserve the coherency of waves with a range of wavevectors as they propagate through the domain. This work has applications for systems with defined boundary conditions and may be extended to more complex problems involving waves randomly nucleated from an impact within a multiscale framework.
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DOI:
10.1016/j.cma.2021.114360
发表时间:
2021-08
影响因子:
7.2
作者:
Alexander S. Davis;J. Lloyd;V. Agrawal
通讯作者:
Alexander S. Davis;J. Lloyd;V. Agrawal
影响因子:
4.4
作者:
Youping Chen
通讯作者:
Youping Chen
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Liming Xiong;Youping Chen
通讯作者:
Youping Chen
影响因子:
4.1
作者:
Xiang Chen;Adrian Diaz;Liming Xiong;D. McDowell;Youping Chen
通讯作者:
Youping Chen
DOI:
10.1051/jp4:2005125116
发表时间:
2005
期刊:
Journal De Physique Iv
影响因子:
--
作者:
Gang Chen;Ronggui Yang;Xiaoyuan Chen
通讯作者:
Xiaoyuan Chen