Multi-displacement continuum model for discrete systems

Jia-Lin Tsai, Hsin Haou Huang*, C. T. Sun

*此作品的通信作者

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

A first-order multi-displacement microstructure continuum model is introduced to represent a discrete diatomic lattice system. This model is developed based on a two-term Taylor series expansion of the local displacement of the lattice. It is found that the multi-displacement continuum model obtained by keeping two terms in the Taylor series yields, in general, a better representation of the lattice system than the effective modulus model. However, this microstructure continuum model cannot characterize the negative group velocity of an optical mode of harmonic wave motion in the diatomic lattice. To capture the negative group velocity, a higher-order multi-displacement continuum model is necessary.

原文English
頁(從 - 到)1767-1771
頁數5
期刊International Journal of Mechanical Sciences
52
發行號12
DOIs
出版狀態Published - 1 12月 2010

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