Determining the effects of surface elasticity and surface stress by measuring the shifts of resonant frequencies | |
Liu Y; Zhang Y(张吟) | |
2016 | |
会议名称 | 23rd International Congress on Sound and Vibration (ICSV) |
会议日期 | JUL 10-14, 2016 |
会议地点 | Athens, GREECE |
关键词 | ELASTICITY SENSOR MASS |
通讯作者 | Zhang, Y (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China. |
中文摘要 | As a structure size scales down to the order of a micron or smaller, there can be a significant changes in the mechanical properties as compared to its macroscopic ones. The nonlocal theories were developed to explain those changes, in which several material constants are involved. Those material constants are (assumed to be) related with the lattice length, grain size, inclusion and defects such as crack, dislocation and void, etc. However, there is still no a clear physical picture for those constants. Various experiments have been conducted to determine those material constants, which always use several specimens and often result in controversial data. Here we propose to use only one specimen and the shifts of its resonant frequencies to determine those material constants. The mechanical properties of a submicron structure is very sensitive to the defects, which is a main reason for the inconclusive results of the above experiments with several specimens. The presence of the material constants can have significant influence on the micro/nanostructure resonant frequencies. By measuring the shifts of resonant frequencies for one specimen, we determine those material constants by solving an inverse problem. Physically, the inverse problem can be solved because the material constants impact on one resonant frequency differently and the shifts of different resonant frequencies are different to one another. This inverse problem solving method gives not only a new but also a more reliable approach of experimentally determining the material constants. |
收录类别 | CPCI-S |
会议主办者 | The research was supported by the National Natural Science Foundation of China (NSFC no. 11372321). |
会议网址 | 10.1098/rspa.2013.0449 |
会议录 | PROCEEDINGS OF THE 23RD INTERNATIONAL CONGRESS ON SOUND AND VIBRATION: FROM ANCIENT TO MODERN ACOUSTICS |
语种 | 英语 |
ISBN号 | 978-960-99226-2-3 |
WOS记录号 | WOS:000388480403116 |
内容类型 | 会议论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/60186] |
专题 | 力学研究所_非线性力学国家重点实验室 |
推荐引用方式 GB/T 7714 | Liu Y,Zhang Y. Determining the effects of surface elasticity and surface stress by measuring the shifts of resonant frequencies[C]. 见:23rd International Congress on Sound and Vibration (ICSV). Athens, GREECE. JUL 10-14, 2016.10.1098/rspa.2013.0449. |
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