重庆大学学报2018，Vol.41Issue(1)：1-8,8.DOI:10.11835/j.issn.1000-582X.2018.01.001
原子尺度上的波
Wave at the atomic scale
摘要
Abstract
With proposing identical particle and virtual particle hypothesis,the control condition of twodimensional velocity is derived,and the propagation of linear waves is described at the atomic scale with using interatomic potential functions.Furthermore,the generation mechanism of the second-order nonlinear waves is studied by considering the effects of lattice anharmonicity and dislocation.The study shows that the lattice distortion caused by lattice anharmonicity and dislocation induces high-order virtual particles,which are the key factor in generating the high-order nonlinear waves,and early-stage nonlinearities or micro-damages,e.g.,dislocation,lead to the increase of the high-order virtual particles,which induces obvious high-order nonlinear waves.Therefore,the early-stage micro-damages can be identified by detecting the high-order nonlinear waves.关键词
弹性波/原子势函数/晶格非谐性/位错/二次非线性波/结构或材料的非线性评价Key words
elastic wave/interatomic potential function/lattice anharmonicity/dislocation/second-order nonlinear wave/evaluation of early-stage nonlinearities or micro-damages instructuresand materials分类
数理科学引用本文复制引用
孙晓强,刘瑶璐,胡宁..原子尺度上的波[J].重庆大学学报,2018,41(1):1-8,8.基金项目
国家自然科学基金资助项目(11372104,11332013,11372363) （11372104,11332013,11372363）
重庆市自然科学基金资助项目(CSTC2015JCYJA50021).Supported by National Natural Science Foundation of China (11372104,11332013,11372363) and Natural Science Foundation of Chongqing (CSTC2015JCYJA50021). （CSTC2015JCYJA50021）
